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  • Reloading Apache httpd on Windows - error 'No installed service named "Apache2.2".'

    - by user143228
    This is a variant of How do I restart Apache on Windows? "Apache -k restart" gives error "No installed service named "Apache2"; I have Apache httpd 2.2.22 on Windows, not running as a service (our product's uber-service starts httpd as a console app). I'm trying to get httpd to reload its configuration; Apache's Windows docs suggest httpd -k restart from any console window. When I do that, I get PS C:\apache\bin> .\httpd.exe -k restart [Mon Oct 29 14:06:56 2012] [error] (OS 2)The system cannot find the file specified. : No installed service named "Apache2.2". How do I convince it Apache's not running as a service?

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  • Debian 5 server is randomly shutting down.

    - by revofreak
    My debian 5 vps is suffering from random shutdowns. I reinstalled it several times, the hosts moved me to a different physical box, check the install image and said everyone else also uses it and is fine. Heres the output from syslog Mar 27 00:19:19 noobintraining-1 -- MARK -- Mar 27 00:32:01 noobintraining-1 shutdown[18142]: shutting down for system halt Mar 27 00:32:06 noobintraining-1 init: Switching to runlevel: 0 Mar 27 00:32:06 noobintraining-1 xinetd[15907]: Exiting... Mar 27 00:32:07 noobintraining-1 named[15865]: received control channel command 'stop -p' Mar 27 00:32:07 noobintraining-1 named[15865]: shutting down: flushing changes Mar 27 00:32:07 noobintraining-1 named[15865]: stopping command channel on 127.0.0.1#953 Mar 27 00:32:07 noobintraining-1 named[15865]: stopping command channel on ::1#953 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on ::#53 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on 127.0.0.1#53 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on 89.238.172.132#53 Mar 27 00:32:07 noobintraining-1 named[15865]: exiting Mar 27 00:32:07 noobintraining-1 exiting on signal 15 Any help is most appreciated!

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  • Debian 5 is randomly shutting down.

    - by revofreak
    My debian 5 vps is suffering from random shutdowns. I reinstalled it several times, the hosts moved me to a different physical box, check the install image and said everyone else also uses it and is fine. Heres the output from syslog Mar 27 00:19:19 noobintraining-1 -- MARK -- Mar 27 00:32:01 noobintraining-1 shutdown[18142]: shutting down for system halt Mar 27 00:32:06 noobintraining-1 init: Switching to runlevel: 0 Mar 27 00:32:06 noobintraining-1 xinetd[15907]: Exiting... Mar 27 00:32:07 noobintraining-1 named[15865]: received control channel command 'stop -p' Mar 27 00:32:07 noobintraining-1 named[15865]: shutting down: flushing changes Mar 27 00:32:07 noobintraining-1 named[15865]: stopping command channel on 127.0.0.1#953 Mar 27 00:32:07 noobintraining-1 named[15865]: stopping command channel on ::1#953 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on ::#53 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on 127.0.0.1#53 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on 89.238.172.132#53 Mar 27 00:32:07 noobintraining-1 named[15865]: exiting Mar 27 00:32:07 noobintraining-1 exiting on signal 15 Any help is most appreciated!

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  • Session memory – who’s this guy named Max and what’s he doing with my memory?

    - by extended_events
    SQL Server MVP Jonathan Kehayias (blog) emailed me a question last week when he noticed that the total memory used by the buffers for an event session was larger than the value he specified for the MAX_MEMORY option in the CREATE EVENT SESSION DDL. The answer here seems like an excellent subject for me to kick-off my new “401 – Internals” tag that identifies posts where I pull back the curtains a bit and let you peek into what’s going on inside the extended events engine. In a previous post (Option Trading: Getting the most out of the event session options) I explained that we use a set of buffers to store the event data before  we write the event data to asynchronous targets. The MAX_MEMORY along with the MEMORY_PARTITION_MODE defines how big each buffer will be. Theoretically, that means that I can predict the size of each buffer using the following formula: max memory / # of buffers = buffer size If it was that simple I wouldn’t be writing this post. I’ll take “boundary” for 64K Alex For a number of reasons that are beyond the scope of this blog, we create event buffers in 64K chunks. The result of this is that the buffer size indicated by the formula above is rounded up to the next 64K boundary and that is the size used to create the buffers. If you think visually, this means that the graph of your max_memory option compared to the actual buffer size that results will look like a set of stairs rather than a smooth line. You can see this behavior by looking at the output of dm_xe_sessions, specifically the fields related to the buffer sizes, over a range of different memory inputs: Note: This test was run on a 2 core machine using per_cpu partitioning which results in 5 buffers. (Seem my previous post referenced above for the math behind buffer count.) input_memory_kb total_regular_buffers regular_buffer_size total_buffer_size 637 5 130867 654335 638 5 130867 654335 639 5 130867 654335 640 5 196403 982015 641 5 196403 982015 642 5 196403 982015 This is just a segment of the results that shows one of the “jumps” between the buffer boundary at 639 KB and 640 KB. You can verify the size boundary by doing the math on the regular_buffer_size field, which is returned in bytes: 196403 – 130867 = 65536 bytes 65536 / 1024 = 64 KB The relationship between the input for max_memory and when the regular_buffer_size is going to jump from one 64K boundary to the next is going to change based on the number of buffers being created. The number of buffers is dependent on the partition mode you choose. If you choose any partition mode other than NONE, the number of buffers will depend on your hardware configuration. (Again, see the earlier post referenced above.) With the default partition mode of none, you always get three buffers, regardless of machine configuration, so I generated a “range table” for max_memory settings between 1 KB and 4096 KB as an example. start_memory_range_kb end_memory_range_kb total_regular_buffers regular_buffer_size total_buffer_size 1 191 NULL NULL NULL 192 383 3 130867 392601 384 575 3 196403 589209 576 767 3 261939 785817 768 959 3 327475 982425 960 1151 3 393011 1179033 1152 1343 3 458547 1375641 1344 1535 3 524083 1572249 1536 1727 3 589619 1768857 1728 1919 3 655155 1965465 1920 2111 3 720691 2162073 2112 2303 3 786227 2358681 2304 2495 3 851763 2555289 2496 2687 3 917299 2751897 2688 2879 3 982835 2948505 2880 3071 3 1048371 3145113 3072 3263 3 1113907 3341721 3264 3455 3 1179443 3538329 3456 3647 3 1244979 3734937 3648 3839 3 1310515 3931545 3840 4031 3 1376051 4128153 4032 4096 3 1441587 4324761 As you can see, there are 21 “steps” within this range and max_memory values below 192 KB fall below the 64K per buffer limit so they generate an error when you attempt to specify them. Max approximates True as memory approaches 64K The upshot of this is that the max_memory option does not imply a contract for the maximum memory that will be used for the session buffers (Those of you who read Take it to the Max (and beyond) know that max_memory is really only referring to the event session buffer memory.) but is more of an estimate of total buffer size to the nearest higher multiple of 64K times the number of buffers you have. The maximum delta between your initial max_memory setting and the true total buffer size occurs right after you break through a 64K boundary, for example if you set max_memory = 576 KB (see the green line in the table), your actual buffer size will be closer to 767 KB in a non-partitioned event session. You get “stepped up” for every 191 KB block of initial max_memory which isn’t likely to cause a problem for most machines. Things get more interesting when you consider a partitioned event session on a computer that has a large number of logical CPUs or NUMA nodes. Since each buffer gets “stepped up” when you break a boundary, the delta can get much larger because it’s multiplied by the number of buffers. For example, a machine with 64 logical CPUs will have 160 buffers using per_cpu partitioning or if you have 8 NUMA nodes configured on that machine you would have 24 buffers when using per_node. If you’ve just broken through a 64K boundary and get “stepped up” to the next buffer size you’ll end up with total buffer size approximately 10240 KB and 1536 KB respectively (64K * # of buffers) larger than max_memory value you might think you’re getting. Using per_cpu partitioning on large machine has the most impact because of the large number of buffers created. If the amount of memory being used by your system within these ranges is important to you then this is something worth paying attention to and considering when you configure your event sessions. The DMV dm_xe_sessions is the tool to use to identify the exact buffer size for your sessions. In addition to the regular buffers (read: event session buffers) you’ll also see the details for large buffers if you have configured MAX_EVENT_SIZE. The “buffer steps” for any given hardware configuration should be static within each partition mode so if you want to have a handy reference available when you configure your event sessions you can use the following code to generate a range table similar to the one above that is applicable for your specific machine and chosen partition mode. DECLARE @buf_size_output table (input_memory_kb bigint, total_regular_buffers bigint, regular_buffer_size bigint, total_buffer_size bigint) DECLARE @buf_size int, @part_mode varchar(8) SET @buf_size = 1 -- Set to the begining of your max_memory range (KB) SET @part_mode = 'per_cpu' -- Set to the partition mode for the table you want to generate WHILE @buf_size <= 4096 -- Set to the end of your max_memory range (KB) BEGIN     BEGIN TRY         IF EXISTS (SELECT * from sys.server_event_sessions WHERE name = 'buffer_size_test')             DROP EVENT SESSION buffer_size_test ON SERVER         DECLARE @session nvarchar(max)         SET @session = 'create event session buffer_size_test on server                         add event sql_statement_completed                         add target ring_buffer                         with (max_memory = ' + CAST(@buf_size as nvarchar(4)) + ' KB, memory_partition_mode = ' + @part_mode + ')'         EXEC sp_executesql @session         SET @session = 'alter event session buffer_size_test on server                         state = start'         EXEC sp_executesql @session         INSERT @buf_size_output (input_memory_kb, total_regular_buffers, regular_buffer_size, total_buffer_size)             SELECT @buf_size, total_regular_buffers, regular_buffer_size, total_buffer_size FROM sys.dm_xe_sessions WHERE name = 'buffer_size_test'     END TRY     BEGIN CATCH         INSERT @buf_size_output (input_memory_kb)             SELECT @buf_size     END CATCH     SET @buf_size = @buf_size + 1 END DROP EVENT SESSION buffer_size_test ON SERVER SELECT MIN(input_memory_kb) start_memory_range_kb, MAX(input_memory_kb) end_memory_range_kb, total_regular_buffers, regular_buffer_size, total_buffer_size from @buf_size_output group by total_regular_buffers, regular_buffer_size, total_buffer_size Thanks to Jonathan for an interesting question and a chance to explore some of the details of Extended Event internals. - Mike

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  • B2B and B2C Commerce are alike… but a little different – Oracle Commerce named Leader in Forrester B2B Commerce Wave

    - by Katrina Gosek
    We weren’t surprised to see Oracle Commerce positioned as a Leader in Forrester’s first Commerce Wave focused on B2B, released earlier this month. The reports validates much of what we’ve heard from our largest customers – the world’s largest distribution, manufacturing and high-tech customers who sell billions of dollars of goods and services to other businesses through their Web channels. More importantly, the report confirms something very important: B2B and B2C Commerce are alike… but a little different. B2B and B2C Commerce are alike… Clearly, B2C experiences have set expectations for B2B. Every B2B buyer is a consumer at home and brings the same expectations to a website selling electronic components, aftermarket parts, or MRO products. Forrester calls these rich consumer-based capabilities that help B2B customers do their jobs “table stakes”: search & navigation, promotions, cross-channel commerce and mobile: “Whether they are just beginning to sell online or are in the late stages of launching a next-generation site, B2B eCommerce operations today must: offer a customer experience standard comparable to what leading b2c sites now offer; address the growing influence that mobile devices are having in the workplace; make a qualitative and quantitative business case that drives sustained investment.” Just five years ago, many of our B2B customers’ online business comprised only 5-10% of their total revenue. Today, when we speak to those same brands, we hear about double and triple digit growth in their online channels. Many have seen the percentage of the business they perform in their web channels cross the 30-50% threshold. You can hear first-hand from several Oracle Commerce B2B customers about the success they are seeing, and what they’re trying to accomplish (Carolina Biological, Premier Farnell, DeliXL, Elsevier). This momentum is likely the reason Forrester broke out the separate B2B Commerce Wave from the B2C Wave. In fact, B2B is becoming the larger force in commerce, expected to collect twice the online dollars of B2C this year ($559 billion). But a little different… Despite the similarities, there is a key and very important difference between B2C and B2B. Unlike a consumer shopping for shoes, a business shopper buying from a distributor or manufacturer is coming to the Web channel as a part of their job. So in addition to a rich, consumer-like experience this shopper expects, these B2B buyers need quoting tools and complex pricing capabilities, like eProcurement, bulk order entry, and other self-service tools such as account, contract and organization management.  Forrester also is emphasizing three additional “back-end” tools and capabilities their clients say they need to drive growth in their B2B online channels: i) product information management (PIM), which provides a single system of record for large part lists and product catalogs; ii) web content management (WCM), needed to manage large volumes of unstructured marketing information, and iii) order management systems (OMS), which manage and orchestrate the complex B2B order life cycle from quote through approval, submission to manufacturing, distribution and delivery.  We would like to expand on each of these 3 areas: As Forrester highlights, back-end PIM is definitely needed by B2B Commerce providers. Most B2B companies have made significant investments in enterprise-grade PIMs, given the importance of product data management for aggregation and syndication of content, product attribution, analytics, and handling of complex workflows. While in principle it may sound appealing to have a PIM as part of a commerce offering (especially for SMBs who have to do more with less), our customers have typically found that PIM in a commerce platform is largely redundant with what they already have in-place, and is not fully-featured or robust enough to handle the complexity of the product data sets that B2B distributors and manufacturers usually handle. To meet the PIM needs for commerce, Oracle offers enterprise PIM (Product Hub/Fusion PIM) and a robust enterprise data quality product (EDQP) integrated with the Oracle Commerce solution. These are key differentiators of our offering and these capabilities are becoming even more tightly integrated with Oracle Commerce over time. For Commerce, what customers really need is a robust product catalog and content management system for enabling business users to further enrich and ready catalog and content data to be presented and sold online.  This has been a significant area of investment in the Oracle Commerce platform , which continue to get stronger. We see this combination of capabilities as best meeting the needs of our customers for a commerce platform without adding a largely redundant, less functional PIM in the commerce front-end.   On the topic of web content management, we were pleased to see Forrester recognize Oracle’s unique functional capabilities in this area and the “unique opportunity in the market to lead the convergence of commerce and content management with the amalgamation of Oracle Commerce with WebCenter Sites (formally FatWire).” Strong content management capabilities are critical for distributors and manufacturers who are frequently serving an engineering audience coming to their websites to conduct product research in search of technical data sheets, drawings, videos and more. The convergence of content, commerce, and experience is critical for B2B brands selling online. Regarding order management, Forrester notes that many businesses use their existing back-end enterprise resource planning (ERP) systems to manage order life cycles.  We hear the same from most of our B2B customers, as they already have an ERP system—if not several of them—and are not interested in yet another one.  So what do we take away from the Wave results? Forrester notes that the Oracle Commerce Platform “has always had strong B2B commerce capabilities and Oracle has an exhaustive list of B2B customers using the solution.”  What makes us excited about developing leading B2B solutions are the close relationships with our customers and the clear opportunity in the market – which we’ll address in an exciting new release in the coming months. Oracle has one of the world’s largest B2B customer bases, providing leading solutions across key business-to-business functions – from marketing, sales automation, and service to master data management, and ERP.  To learn more about Oracle’s Commerce product vision and strategy, visit our website and check out these other B2B Commerce Resources: - 2013 B2B Commerce Trends Report - B2B Commerce Whitepaper: Consumerization, Complexity, Change - B2B Commerce Webcast: What Industry Trend Setters Do Right - Internet Retailer, Web Drives Sales for B2B Companies - Internet Retailer, The Web Means Business: B2B Companies Beef Up Their Websites, borrowing from b2c retailers and breaking new ground - Internet Retailer, B2B e-Commerce is poised for growth ----------THIS DOCUMENT IS FOR INFORMATIONAL PURPOSES ONLY AND MAY NOT BE INCORPORATED INTO A CONTRACT OR AGREEMENT 

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  • B2B and B2C alike… but a little different – Oracle Commerce named Leader in Forrester B2B Commerce Wave

    - by Katrina Gosek
    We weren’t surprised to see Oracle Commerce positioned as a Leader in Forrester Research, Inc.’s first Commerce Wave focused on B2B, “The Forrester Wave™: B2B Commerce Suites, Q4 2013,” released earlier this month. We believe that the report validates much of what we’ve heard from our largest customers – the world’s largest distribution, manufacturing and high-tech customers who sell billions of dollars of goods and services to other businesses through their Web channels. More importantly, we feel that the report confirms something very important: B2B and B2C Commerce are alike… but a little different. B2B and B2C Commerce are alike… Clearly, B2C experiences have set expectations for B2B. Every B2B buyer is a consumer at home and brings the same expectations to a website selling electronic components, aftermarket parts, or MRO products. Forrester calls these rich consumer-based capabilities that help B2B customers do their jobs “table stakes”: front-office content, community, and commerce features that meet customer expectations for 24x7x365 ordering, real-time customer service, and expedited shipping — both online and on mobile devices: “Whether they are just beginning to sell online or are in the late stages of launching a next-generation site, B2B eCommerce operations today must: offer a customer experience standard comparable to what leading b2c sites now offer; address the growing influence that mobile devices are having in the workplace; make a qualitative and quantitative business case that drives sustained investment.” Just five years ago, many of our B2B customers’ online business comprised only 5-10% of their total revenue. Today, when we speak to those same brands, we hear about double and triple digit growth in their online channels. Many have seen the percentage of the business they perform in their web channels cross the 30-50% threshold. You can hear first-hand from several Oracle Commerce B2B customers about the success they are seeing, and what they’re trying to accomplish (Carolina Biological, Premier Farnell, DeliXL, Elsevier). It seems that this market momentum is likely the reason Forrester broke out the separate B2B Commerce Wave from the B2C Wave. In fact, B2B is becoming the larger force in commerce, expected to collect twice the online dollars of B2C this year ($559 billion). But a little different… Despite the similarities, there is a key and very important difference between B2C and B2B. Unlike a consumer shopping for shoes, a business shopper buying from a distributor or manufacturer is coming to the Web channel as a part of their job. So in addition to a rich, consumer-like experience this shopper expects, these B2B buyers need quoting tools and complex pricing capabilities, like eProcurement, bulk order entry, and other self-service tools such as account, contract and organization management. Forrester also is emphasizing three additional “back-end” tools and capabilities their clients say they need to drive growth in their B2B online channels: i) product information management (PIM), which provides a single system of record for large part lists and product catalogs; ii) web content management (WCM), needed to manage large volumes of unstructured marketing information, and iii) order management systems (OMS), which manage and orchestrate the complex B2B order life cycle from quote through approval, submission to manufacturing, distribution and delivery. We would like to expand on each of these 3 areas: As Forrester suggests, back-end PIM is definitely needed by B2B Commerce providers. Most B2B companies have made significant investments in enterprise-grade PIMs, given the importance of product data management for aggregation and syndication of content, product attribution, analytics, and handling of complex workflows. While in principle it may sound appealing to have a PIM as part of a commerce offering (especially for SMBs who have to do more with less), our customers have typically found that PIM in a commerce platform is largely redundant with what they already have in-place, and is not fully-featured or robust enough to handle the complexity of the product data sets that B2B distributors and manufacturers usually handle. To meet the PIM needs for commerce, Oracle offers enterprise PIM (Product Hub/Fusion PIM) and a robust enterprise data quality product (EDQP) integrated with the Oracle Commerce solution. These are key differentiators of our offering and these capabilities are becoming even more tightly integrated with Oracle Commerce over time. For Commerce, what customers really need is a robust product catalog and content management system for enabling business users to further enrich and ready catalog and content data to be presented and sold online.  This has been a significant area of investment in the Oracle Commerce platform , which continue to get stronger. We see this combination of capabilities as best meeting the needs of our customers for a commerce platform without adding a largely redundant, less functional PIM in the commerce front-end.  On the topic of web content management, we were pleased to see Forrester cite Oracle’s differentiated digital experience capability in this area and the “unique opportunity in the market to lead the convergence of commerce and content management with the amalgamation of Oracle Commerce with WebCenter Sites (formally FatWire).” Strong content management capabilities are critical for distributors and manufacturers who are frequently serving an engineering audience coming to their websites to conduct product research in search of technical data sheets, drawings, videos and more. The convergence of content, commerce, and experience is critical for B2B brands selling online. Regarding order management, Forrester notes that many businesses use their existing back-end enterprise resource planning (ERP) systems to manage order life cycles.  We hear the same from most of our B2B customers, as they already have an ERP system—if not several of them—and are not interested in yet another one. So what do we take away from the Wave results? Forrester notes that the Oracle Commerce Platform “has always had strong B2B commerce capabilities and Oracle certainly has an exhaustive list of B2B customers using the solution.”  What makes us excited about developing leading B2B solutions are the close relationships with our customers and the clear opportunity in the market – which we'll address in an exciting new release planned for the next 12 months. Oracle has one of the world’s largest B2B customer bases, providing leading solutions across key business-to-business functions – from marketing, sales automation, and service to master data management, and ERP. To learn more about Oracle’s Commerce product vision and strategy, visit our website and check out these other B2B Commerce Resources: -       2013 B2B Commerce Trends Report -       B2B Commerce Whitepaper: Consumerization, Complexity, Change -       B2B Commerce Webcast: What Industry Trend Setters Do Right -       Internet Retailer, Web Drives Sales for B2B Companies -       Internet Retailer Article, The Web Means Business: B2B Companies Beef Up Their Websites,        borrowing from b2c retailers and breaking new ground -       Internet Retailer Article, B2B e-Commerce is poised for growth

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  • ImportError: No module named _socket? WSGI Deployment into Apache

    - by Sxkaur
    I am using WSGI 3.3 for python 2.7.3 (32bit) for Apache 2.2. I got the binary WSGI from http://code.google.com/p/modwsgi/downloads/detail?name=mod_wsgi-win32-ap22py27-3.3.so. I have been trying to deploy an application but keep on receiving the ImportError: no module named _socket. I have included my wsgi and error logs. APACHE config: #LoadModule vhost_alias_module modules/mod_vhost_alias.so LoadModule wsgi_module modules/mod_wsgi.so <Directory C:/Users/xxxxd/Documents/cahd> AllowOverride None Options None Order deny,allow Allow from all </Directory> WSGIScriptAlias / C:/Users/xxxxd/Documents/cahd/cahd/django.wsgi import os, sys sys.path.append('C:/Users/xxxxd/Documents) sys.path.append('C:/Users/xxxxd/Documents/cahd/') os.environ['DJANGO_SETTINGS_MODULE'] = 'cahd.settings' import django.core.handlers.wsgi application = django.core.handlers.wsgi.WSGIHandler() The error was: [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] Traceback (most recent call last): [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1 ]File "C:/Users/xxxxd/Documents/cahd/django.wsgi", line 10, in <module> [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] import django.core.handlers.wsgi [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] File "C:\\django\\Django-1.4.1\\django\\core\\handlers\\wsgi.py", line 8, in <module> [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] from django import http [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] File "C:\\django\\Django-1.4.1\\django\\http\\__init__.py", line 11, in <module> [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] from urllib import urlencode, quote [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] File "C:\\Python27\\Lib\\urllib.py", line 26, in <module> [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] import socket [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] File "C:\\Python27\\Lib\\socket.py", line 47, in <module> [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] import _socket [Mon Nov 19 09:44:17 2012] [error] [client 127.0.0.1] ImportError: No module named _socket

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  • Anonymous function vs. separate named function for initialization in jquery

    - by Martin N.
    We just had some controversial discussion and I would like to see your opinions on the issue: Let's say we have some code that is used to initialize things when a page is loaded and it looks like this: function initStuff() { ...} ... $(document).ready(initStuff); The initStuff function is only called from the third line of the snippet. Never again. Now I would say: Usually people put this into an anonymous callback like that: $(document).ready(function() { //Body of initStuff }); because having the function in a dedicated location in the code is not really helping with readability, because with the call on ready() makes it obvious, that this code is initialization stuff. Would you agree or disagree with that decision? And why? Thank you very much for your opinion!

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  • Is it possible to mix a named pipe with select in perl?

    - by Haiyuan Zhang
    I need to write a daemon that supposed to have one TCP socket and one named pipe. Usually if I need to implement a multi IO server with "pure" sockets, the select based multi-IO model is always the one I will choose. so does anyone of you have ever used named pipe in select or you can just tell me it is impossible. thanks in advance.

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  • How to create a named temporary file in memory?

    - by conradlee
    I would like to use Python's tempfile module to create a temporary file that I will use for communication between processes (use of pipes is awkward). The documentation I've linked to above shows two functions that almost do what I want: tempfile.NamedTemporaryFile # For creating named tempfiles tempfile.SpooledTemporaryFile # For creating tempfiles in memory but actually I want a tempfile that is both named AND in memory. Any ideas?

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  • [Python] How to create a named temporary file in memory?

    - by conradlee
    I would like to use Python's tempfile module to create a temporary file that I will use for communication between processes (use of pipes is awkward). The documentation I've linked to above shows two functions that almost do what I want: tempfile.NamedTemporaryFile # For creating named tempfiles tempfile.SpooledTemporaryFile # For creating tempfiles in memory but actually I want a tempfile that is both named AND in memory. Any ideas?

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  • What prevents an attack on Postfix through its named pipes?

    - by Met?Ed
    What prevents an attack on Postfix through its named pipes by writing bogus data to them? I see on my system that they permit write access to other. I wonder if that opens Postfix to DoS or some other form of attack. prw--w--w- 1 postfix postdrop 0 Nov 28 21:13 /var/spool/postfix/public/pickup prw--w--w- 1 postfix postdrop 0 Nov 28 21:13 /var/spool/postfix/public/qmgr I reviewed the pickup(8) man page, and searched here and elsewhere, but failed to turn up any answers.

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  • DNS server not functioning correctly

    - by Shamit Shrestha
    I have setup a DNS server which isnt working properly. My domain is accswift.com which has glued to two name servers ns1.accswift.com and ns2.accswift.com for the same IP address - 203.78.164.18. On domain end everything should be fine. Please check -http://www.intodns.com/accswift.com I am sure its the problem with the linux server. Can anyone help me find where the problem is for me? Below is the settings that I have in the server. ====================== DIG [root@accswift ~]# dig accswift.com ; << DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6_4.6 << accswift.com ;; global options: +cmd ;; Got answer: ;; -HEADER<<- opcode: QUERY, status: NOERROR, id: 11275 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2 ;; QUESTION SECTION: ;accswift.com. IN A ;; ANSWER SECTION: accswift.com. 38400 IN A 203.78.164.18 ;; AUTHORITY SECTION: accswift.com. 38400 IN NS ns1.accswift.com. accswift.com. 38400 IN NS ns2.accswift.com. ;; ADDITIONAL SECTION: ns1.accswift.com. 38400 IN A 203.78.164.18 ns2.accswift.com. 38400 IN A 203.78.164.18 ;; Query time: 1 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Wed Nov 6 20:12:16 2013 ;; MSG SIZE rcvd: 114 ============== IP Tables settings vi /etc/sysconfig/iptables *filter :FORWARD ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A FORWARD -o eth0 -j LOG --log-level 7 --log-prefix BANDWIDTH_OUT: -A FORWARD -i eth0 -j LOG --log-level 7 --log-prefix BANDWIDTH_IN: -A OUTPUT -o eth0 -j LOG --log-level 7 --log-prefix BANDWIDTH_OUT: -A INPUT -i eth0 -j LOG --log-level 7 --log-prefix BANDWIDTH_IN: -A INPUT -p udp -m udp --sport 53 -j ACCEPT -A OUTPUT -p udp -m udp --dport 53 -j ACCEPT COMMIT Completed on Fri Sep 20 04:20:33 2013 Generated by webmin *mangle :FORWARD ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :PREROUTING ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] COMMIT Completed Generated by webmin *nat :OUTPUT ACCEPT [0:0] :PREROUTING ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] COMMIT ====DNS settings vi /var/named/accswift.com.host $ttl 38400 @ IN SOA ns1.accswift.com. root.ns1.accswift.com. ( 1382936091 10800 3600 604800 38400 ) @ IN NS ns1.accswift.com. @ IN NS ns2.accswift.com. accswift.com. IN A 203.78.164.18 accswift.com. IN NS ns1.accswift.com. www.accswift.com. IN A 203.78.164.18 ftp.accswift.com. IN A 203.78.164.18 m.accswift.com. IN A 203.78.164.18 ns1 IN A 203.78.164.18 ns2 IN A 203.78.164.18 localhost.accswift.com. IN A 127.0.0.1 webmail.accswift.com. IN A 203.78.164.18 admin.accswift.com. IN A 203.78.164.18 mail.accswift.com. IN A 203.78.164.18 accswift.com. IN MX 5 mail.accswift.com. ====Named.conf vi /etc/named.conf options { listen-on port 53 { 127.0.0.1; }; listen-on-v6 port 53 { ::1; }; directory "/var/named"; dump-file "/var/named/data/cache_dump.db"; statistics-file "/var/named/data/named_stats.txt"; memstatistics-file "/var/named/data/named_mem_stats.txt"; allow-query { any; }; recursion yes; allow-recursion { localhost; 192.168.2.0/24; }; dnssec-enable yes; dnssec-validation yes; dnssec-lookaside auto; /* Path to ISC DLV key */ bindkeys-file "/etc/named.iscdlv.key"; managed-keys-directory "/var/named/dynamic"; forward first; forwarders {192.168.1.1;}; }; logging { channel default_debug { file "data/named.run"; severity dynamic; }; }; zone "." IN { type hint; file "named.ca"; }; include "/etc/named.rfc1912.zones"; include "/etc/named.root.key"; zone "accswift.com" { type master; file "/var/named/accswift.com.hosts"; allow-transfer { 127.0.0.1; localnets; 208.73.211.69; }; }; zone "ns1.accswift.com" { type master; file "/var/named/ns1.accswift.com.hosts"; }; ==================================== Can anybody find any flaw in this? I am still unable to reach accswift.com from any other ISP. But it is browsable from the same network though. Thanks in advance.

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  • compiling openss7

    - by deddihp
    hello, i got an error while compiling openss7. Do you know what happen ? Thanks.... gcc -DHAVE_CONFIG_H -I. -I. -I. -DLFS=1 -imacros ./config.h -imacros ./include/sys/config.h -I. -I./include -I./include -nostdinc -iwithprefix include -DLINUX -D__KERNEL__ -I/usr/src/linux-headers-lbm-2.6.28-11-generic -I/lib/modules/2.6.28-11-generic/build/include -Iinclude2 -I/lib/modules/2.6.28-11-generic/build/include -I/lib/modules/2.6.28-11-generic/build/arch/x86/include -include /lib/modules/2.6.28-11-generic/build/include/linux/autoconf.h -Iubuntu/include -I/lib/modules/2.6.28-11-generic/build/ubuntu/include -I/lib/modules/2.6.28-11-generic/build/arch/x86/include/asm/mach-default '-DKBUILD_STR(s)=#s' '-DKBUILD_BASENAME=KBUILD_STR('`echo libLfS_specfs_a-specfs.o | sed -e 's,lib.*_a-,,;s,\.o,,;s,-,_,g'`')' -DMODULE -D__NO_VERSION__ -DEXPORT_SYMTAB -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -O2 -m32 -msoft-float -mregparm=3 -freg-struct-return -mpreferred-stack-boundary=2 -march=i586 -mtune=generic -Wa,-mtune=generic32 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -fno-stack-protector -fno-omit-frame-pointer -fno-optimize-sibling-calls -Wdeclaration-after-statement -Wno-pointer-sign -fwrapv -ffreestanding -c -o libLfS_specfs_a-specfs.o `test -f 'src/kernel/specfs.c' || echo './'`src/kernel/specfs.c In file included from src/kernel/specfs.c:123: src/kernel/strspecfs.c: In function ‘specfs_init_cache’: src/kernel/strspecfs.c:1406: warning: passing argument 5 of ‘kmem_cache_create’ from incompatible pointer type src/kernel/strspecfs.c:1406: error: too many arguments to function ‘kmem_cache_create’ In file included from src/kernel/specfs.c:126: src/kernel/strlookup.c: In function ‘cdev_lookup’: src/kernel/strlookup.c:508: warning: format not a string literal and no format arguments src/kernel/strlookup.c:514: warning: format not a string literal and no format arguments src/kernel/strlookup.c:521: warning: format not a string literal and no format arguments src/kernel/strlookup.c: In function ‘cdrv_lookup’: src/kernel/strlookup.c:562: warning: format not a string literal and no format arguments src/kernel/strlookup.c: In function ‘fmod_lookup’: src/kernel/strlookup.c:604: warning: format not a string literal and no format arguments src/kernel/strlookup.c: In function ‘cdev_search’: src/kernel/strlookup.c:709: warning: format not a string literal and no format arguments src/kernel/strlookup.c:716: warning: format not a string literal and no format arguments src/kernel/strlookup.c: In function ‘fmod_search’: src/kernel/strlookup.c:768: warning: format not a string literal and no format arguments src/kernel/strlookup.c: In function ‘cmin_search’: src/kernel/strlookup.c:823: warning: format not a string literal and no format arguments src/kernel/strlookup.c:830: warning: format not a string literal and no format arguments src/kernel/strlookup.c:840: warning: format not a string literal and no format arguments src/kernel/strlookup.c:848: warning: format not a string literal and no format arguments In file included from src/kernel/specfs.c:129: src/kernel/strattach.c: In function ‘check_mnt’: src/kernel/strattach.c:131: error: ‘struct vfsmount’ has no member named ‘mnt_namespace’ src/kernel/strattach.c:131: error: ‘struct task_struct’ has no member named ‘namespace’ src/kernel/strattach.c: In function ‘do_fattach’: src/kernel/strattach.c:200: error: ‘struct nameidata’ has no member named ‘dentry’ src/kernel/strattach.c:200: error: ‘struct nameidata’ has no member named ‘mnt’ src/kernel/strattach.c:200: error: ‘struct nameidata’ has no member named ‘dentry’ src/kernel/strattach.c:203: error: ‘struct nameidata’ has no member named ‘mnt’ src/kernel/strattach.c:208: error: ‘struct nameidata’ has no member named ‘mnt’ src/kernel/strattach.c:208: error: ‘struct nameidata’ has no member named ‘mnt’ src/kernel/strattach.c:208: error: ‘struct nameidata’ has no member named ‘dentry’ src/kernel/strattach.c:226: error: implicit declaration of function ‘path_release’ src/kernel/strattach.c: In function ‘do_fdetach’: src/kernel/strattach.c:253: error: ‘struct nameidata’ has no member named ‘dentry’ src/kernel/strattach.c:253: error: ‘struct nameidata’ has no member named ‘mnt’ src/kernel/strattach.c:255: error: ‘struct nameidata’ has no member named ‘mnt’ src/kernel/strattach.c:257: error: ‘struct nameidata’ has no member named ‘dentry’ src/kernel/strattach.c:262: error: ‘struct nameidata’ has no member named ‘mnt’ src/kernel/strattach.c:265: error: ‘struct nameidata’ has no member named ‘mnt’ In file included from src/kernel/specfs.c:132: src/kernel/strpipe.c: In function ‘do_spipe’: src/kernel/strpipe.c:372: warning: assignment discards qualifiers from pointer target type make[4]: *** [libLfS_specfs_a-specfs.o] Error 1 make[4]: Leaving directory `/home/deddihp/dev/source/openss7-0.9.2.G/streams-0.9.2.4' make[3]: *** [all-recursive] Error 1 make[3]: Leaving directory `/home/deddihp/dev/source/openss7-0.9.2.G/streams-0.9.2.4' make[2]: *** [all] Error 2 make[2]: Leaving directory `/home/deddihp/dev/source/openss7-0.9.2.G/streams-0.9.2.4' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/deddihp/dev/source/openss7-0.9.2.G' make: *** [all] Error 2

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  • AppFabric named cache, what happens if you lose a cache host?

    - by Liam
    I'm getting my head around how app fabric clustering works and there's something I'm not sure about. Given a structure where we have one named cache, with two lead hosts and (say) three cache hosts and high availability turned off and the lead host(s) performing the management role. When one cache host goes down do you loose the data that was on that cache host? In this MSDN article it states: Data on the non-lead hosts would be lost (assuming high availability was not enabled), but the rest of the cluster could continue serving and storing data But I was unsure if redundancy is built into the system. Would you loose x amount of data or would one of the other cache hosts store this data also and pick up the slack?

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  • How to include named capture groups in java regex?

    - by jrummell
    I'm new to regex in Java and I can't figure out how to include named capture groups in an expression. I'm writing a ScrewTurn Image Converter for Confluence's Universal Wiki Converter. This is what I have: String image = "\\[image(?<align>auto)?\\|\\|{UP\\(((?<namespace>\\w+)\\.)?(?<pagename>[\\w-]+)\\)}(?<filename>[\\w- ]+\\.[\\w]+)\\]"; Pattern imagePattern = Pattern.compile(image, Pattern.CASE_INSENSITIVE); It's throwing this exception in Pattern.comiple(): java.util.regex.PatternSyntaxException: Unknown look-behind group near index 19 \[image(?<align>auto)?\|\|{UP\(((?<namespace>\w+)\.)?(?<pagename>[\w-]+)\)}(?<filename>[\w- ]+\.[\w]+)\] ^ I've used named capture groups like this before in C# (?<namedgroup>asdf), but not in Java. What am I missing?

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  • Is my dns server being attacked? And what should I do about it?

    - by Mnebuerquo
    I've been having some intermittent dns problems with a web server, where certain isp's dns servers don't have my hostnames in cache and fail to look them up. At the same time, queries to opendns for those hostnames resolve correctly. It's intermittent, and it always works fine for me, so it's hard to identify the problem when someone reports connectivity problems to my site. In trying to figure this out, I've been looking at my logs to see if there are any errors I should know about. I found thousands of the following messages in my logs, from different ip's, but all requesting similar dns records: May 12 11:42:13 localhost named[26399]: client 94.76.107.2#36141: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:13 localhost named[26399]: client 94.76.107.2#29075: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:13 localhost named[26399]: client 94.76.107.2#47924: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:13 localhost named[26399]: client 94.76.107.2#4727: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:14 localhost named[26399]: client 94.76.107.2#16153: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:14 localhost named[26399]: client 94.76.107.2#40267: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:43:35 localhost named[26399]: client 82.209.240.241#63507: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:43:35 localhost named[26399]: client 82.209.240.241#63721: query (cache) 'burningpianos.org/MX/IN' denied May 12 11:43:36 localhost named[26399]: client 82.209.240.241#3537: query (cache) 'burningpianos.com/MX/IN' denied I've read of Dan Kaminski's dns cache poisoning vulnerability, and I'm wondering if these log records are an attempt by some evildoer to attack my dns server. There are thousands of records in my logs, all requesting "burningpianos", some for com and some for org, most looking for an mx record. There are requests from multiple ip's, but each ip will request hundreds of times per day. So this smells to me like an attack. What is the defense against this?

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  • How does one properly redefine self while avoiding the "Multiple methods named ..." warning?

    - by Elise van Looij
    In Apple's The Objective-C Programming Language: Defining a Class the section named "Redifining self" recommends that that class methods allocate and return instances use 'self' only to allocate an instance and then refer only to that instance. Thus, I have a number of subclasses, that have class methods along the lines of: + (id)scrollViewWithFrame: (NSRect)rectFrame { id newInstance = [[[self alloc] initWithFrame:rectFrame] autorelease]; [newInstance setHasHorizontalScroller: YES]; [newInstance setHasVerticalScroller: YES]; [newInstance setBorderType: NSNoBorder]; [newInstance setAutoresizingMask: (NSViewWidthSizable | NSViewHeightSizable)]; return newInstance; } The above is, of course, a subclass of NSScrollView. Unfortunately, Xcode 3.x all these NSView subclasses now raise warnings: "Warning: Multiple methods named '-setAutoresizingMask' found". I believe it has something to do with GCC 4.2, the settings of which I have not changed. The warning is correct, of course, since NSView and its various subclasses all implement setAutoresizingMask, but it is also unnecessary. Since they're only warnings, I ignore them but there is a risk that in between the thirty or so unnecessary ones, a really useful warning lurks which I simply don't see. So, what to do? I do want to adhere to good coding practices and I want to build warning-free apps -- how can I do both?

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  • How can I dynamically call the named route in a :partial in rails?

    - by Angela
    I have the following partial. It can be called from three different times in a view as follows: <%= render :partial => "contact_event", :collection => @contacts, :locals => {:event => email} %> Second time: <%= render :partial => "contact_event", :collection => @contacts, :locals => {:event => call} %> Third time: <%= render :partial => "contact_event", :collection => @contacts, :locals => {:event => letter} %> In each instance, call, email, letter refer to a specific instance of a Model Call, Email, or Letter. Here is what I tried to do and conceptually what I'd like to do: assign the route based on the class name that has been passed to the :event from the :partial. What I did was create what the actual url should be. The 'text' of it is correct, but doesn't seem to recognize it as a named route. <% url = "skip_contact_#{event.class.name.tableize.singularize}_url" % <%= link_to_remote "Skip #{url} Remote", :url = skip_contact_email_url(contact_event, event), :update = "update-area-#{contact_event.id}-#{event.id}" % ' My challenge: skip_contact_email_url only works when the event refers to an email. How can I dynamically define skip_contact_email_url to be skip_contact_letter_url if the local variable is letter? Even better, how can I have a single named route that would do the appropriate action?

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  • How to send messages between c++ .dll and C# app using named pipe?

    - by Gal
    I'm making an injected .dll written in C++, and I want to communicate with a C# app using named pipes. Now, I am using the built in System.IO.Pipe .net classes in the C# app, and I'm using the regular functions in C++. I don't have much experience in C++ (Read: This is my first C++ code..), tho I'm experienced in C#. It seems that the connection with the server and the client is working, the only problem is the messaged aren't being send. I tried making the .dll the server, the C# app the server, making the pipe direction InOut (duplex) but none seems to work. When I tried to make the .dll the server, which sends messages to the C# app, the code I used was like this: DWORD ServerCreate() // function to create the server and wait till it successfully creates it to return. { hPipe = CreateNamedPipe(pipename,//The unique pipe name. This string must have the following form: \\.\pipe\pipename PIPE_ACCESS_DUPLEX, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_NOWAIT, //write and read and return right away PIPE_UNLIMITED_INSTANCES,//The maximum number of instances that can be created for this pipe 4096 , // output time-out 4096 , // input time-out 0,//client time-out NULL); if(hPipe== INVALID_HANDLE_VALUE) { return 1;//failed } else return 0;//success } void SendMsg(string msg) { DWORD cbWritten; WriteFile(hPipe,msg.c_str(), msg.length()+1, &cbWritten,NULL); } void ProccesingPipeInstance() { while(ServerCreate() == 1)//if failed { Sleep(1000); } //if created success, wait to connect ConnectNamedPipe(hPipe, NULL); for(;;) { SendMsg("HI!"); if( ConnectNamedPipe(hPipe, NULL)==0) if(GetLastError()==ERROR_NO_DATA) { DebugPrintA("previous closed,ERROR_NO_DATA"); DisconnectNamedPipe(hPipe); ConnectNamedPipe(hPipe, NULL); } Sleep(1000); } And the C# cliend like this: static void Main(string[] args) { Console.WriteLine("Hello!"); using (var pipe = new NamedPipeClientStream(".", "HyprPipe", PipeDirection.In)) { Console.WriteLine("Created Client!"); Console.Write("Connecting to pipe server in the .dll ..."); pipe.Connect(); Console.WriteLine("DONE!"); using (var pr = new StreamReader(pipe)) { string t; while ((t = pr.ReadLine()) != null) { Console.WriteLine("Message: {0}",t); } } } } I see that the C# client connected to the .dll, but it won't receive any message.. I tried doing it the other way around, as I said before, and trying to make the C# send messages to the .dll, which would show them in a message box. The .dll was injected and connected to the C# server, but when It received a message it just crashed the application it was injected to. Please help me, or guide me on how to use named pipes between C++ and C# app

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