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• deploying war on tomcat fails to start

  - by Asghar

  i have a java application which uses JAX_WS when i deployed on my tomcat5 server . it is deployed successfully. but it fails to start SEVERE: WSSERVLET11: failed to parse runtime descriptor: java.lang.IllegalArgumentException: prefix cannot be "null" when creating a QName java.lang.IllegalArgumentException: prefix cannot be "null" when creating a QName at javax.xml.namespace.QName.<init>(xml-commons-apis-1.3.02.jar.so) at gnu.xml.stream.XMLParser.getAttributeName(libgcj.so.7rh) at com.sun.xml.ws.util.xml.XMLStreamReaderFilter.getAttributeName(XMLStreamReaderFilter.java:228) at com.sun.xml.ws.streaming.XMLStreamReaderUtil$AttributesImpl.<init>(XMLStreamReaderUtil.java:355) at com.sun.xml.ws.streaming.XMLStreamReaderUtil.getAttributes(XMLStreamReaderUtil.java:198) at com.sun.xml.ws.transport.http.DeploymentDescriptorParser.parseAdapters(DeploymentDescriptorParser.java:204) at com.sun.xml.ws.transport.http.DeploymentDescriptorParser.parse(DeploymentDescriptorParser.java:147) at com.sun.xml.ws.transport.http.servlet.WSServletContextListener.contextInitialized(WSServletContextListener.java:124) at org.apache.catalina.core.StandardContext.listenerStart(catalina-5.5.23.jar.so) at org.apache.catalina.core.StandardContext.start(catalina-5.5.23.jar.so) at org.apache.catalina.manager.ManagerServlet.start(catalina-manager-5.5.23.jar.so) at org.apache.catalina.manager.HTMLManagerServlet.start(catalina-manager-5.5.23.jar.so) at org.apache.catalina.manager.HTMLManagerServlet.doGet(catalina-manager-5.5.23.jar.so) at javax.servlet.http.HttpServlet.service(tomcat5-servlet-2.4-api-5.5.23.jar.so) at javax.servlet.http.HttpServlet.service(tomcat5-servlet-2.4-api-5.5.23.jar.so) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(catalina-5.5.23.jar.so) at org.apache.catalina.core.ApplicationFilterChain.doFilter(catalina-5.5.23.jar.so) at org.apache.catalina.core.StandardWrapperValve.invoke(catalina-5.5.23.jar.so) at org.apache.catalina.core.StandardContextValve.invoke(catalina-5.5.23.jar.so) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(catalina-5.5.23.jar.so) at org.apache.catalina.core.StandardHostValve.invoke(catalina-5.5.23.jar.so) at org.apache.catalina.valves.ErrorReportValve.invoke(catalina-5.5.23.jar.so) at org.apache.catalina.core.StandardEngineValve.invoke(catalina-5.5.23.jar.so) at org.apache.catalina.connector.CoyoteAdapter.service(catalina-5.5.23.jar.so) at org.apache.coyote.http11.Http11Processor.process(tomcat-http-5.5.23.jar.so) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(tomcat-http-5.5.23.jar.so) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(tomcat-util-5.5.23.jar.so) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(tomcat-util-5.5.23.jar.so) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(tomcat-util-5.5.23.jar.so) at java.lang.Thread.run(libgcj.so.7rh)

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• Substiting a line through PHP in SSH

  - by Asad Moeen

  I've already setup SSH usage in PHP and most of the things work. Now what I want to do is that I'm looking to edit a line in a file and replace it back. It works directly on the server but can't seem to get it working with PHP files. Here is what I'm trying. $new_line1 = 'Line $I want to add - The $I has to go into the file as it is'; $new_line2 = 'Ending $text of the line - $text again goes into file; $query = "Addition to line"; $exec1= 'cd /root; perl -pe "s/.*/' ; $exec2= '/ if $. == 37" Edit.sh > Edited.sh'; $new="$exec1$new_line1$query$new_line2$exec2"; $edit="cd /root/mp; cp Edited.sh Edit.sh"; echo $ssh->exec($new); echo $ssh->exec($edit); Now the thing is that running the perl command directly in SSH works without any errors but when I run this through PHP I get the error: Substitution replacement not terminated at -e line 1. I want to know why would it work this way and not that?

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• android geting data from sql

  - by sagar

  Hello i m new to android. i wont to connect to sql server for store and get data so so me one can help me sending code of android for do it.. i had tried to do tht with java nd it was workink but now i wont to create a aplication for android my java code is :: import java.sql.*; public class MysqlTest { public static void main (String[] args) { Connection conn = null; try { String userName = "pietro"; //change it to your username String password = "pietro"; //change it to your password String url = "jdbc:mysql://192.168.0.67:3306/registro"; Class.forName("com.mysql.jdbc.Driver").newInstance(); conn = DriverManager.getConnection(url, userName, password); Statement s = (Statement) conn.createStatement(); // code for create a tabel in server s.execute("create table School2 (rolno integer,sub text)"); // code for create a tabel in server s.execute("insert into School2(rolno,sub)values(10,'java')"); //code for add value in tabel s.execute("select rolno,sub from School2");//code for add value in tabel s.close(); System.out.println("Database connection established"); } catch (Exception e) { System.err.println("Cannot connect to database server"); } finally { if (conn != null) { try { conn.close (); System.out.println("Database connection terminated"); } catch (Exception e) { /* ignore close errors */ } } } } }

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• Tomcat6 getting crashed at regular intervals installed in Ubuntu

  - by Milesh Rout

  I have installed Tomcat6 in Ubuntu OS and when I run my web application the server gets crashed at regular intervals. I have tried a lot but not getting the solution. I have increased the memory upto 2048mb but still getting such error. Following is the error I am getting. Any help would be really appreciated. org.apache.tomcat.util.http.Parameters processParametersINFO: Invalid chunk starting at byte [312] and ending at byte [312] with a value of [null] ignoredException in thread "Timer-1" Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0" Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2" Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1" Exception in thread "Timer-2" Exception in thread "http-8080-4" Exception in thread "http-8080-8" Exception in thread "http-8080-17" Exception in thread "org.hibernate.cache.StandardQueryCache.data" Exception in thread "org.hibernate.cache.UpdateTimestampsCache.data" Exception in thread "org.hibernate.cache.StandardQueryCache.data" Exception in thread "org.hibernate.cache.StandardQueryCache.data" Exception in thread "org.hibernate.cache.UpdateTimestampsCache.data" Exception in thread "org.hibernate.cache.StandardQueryCache.data" Exception in thread "org.hibernate.cache.StandardQueryCache.data" Exception in thread "org.hibernate.cache.UpdateTimestampsCache.data" Exception in thread "com.safenet.usermgmt.User.data" Exception in thread "http-8080-7" Exception in thread "http-8080-12" Exception in thread "http-8080-16" Exception in thread "http-8080-14" Exception in thread "http-8080-13" Exception in thread "http-8080-15" Exception in thread "http-8080-6" OpenJDK Client VM warning: Exception java.lang.OutOfMemoryError occurred dispatching signal SIGTERM to handler- the VM may need to be forcibly terminated

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• How to use a home network patch panel?

  - by Torben Gundtofte-Bruun

  I'm planning a home network in a house that's not built yet. One recommendation is to add network sockets in various rooms and have them all end in a central place, where it all connects using a network switch. So far so good. Another recommendation says to not connect everything directly to the switch, but to a patch panel which in turn is connected to the switch. I'm unsure why this is good. Is there any practical advantage of using a patch panel if you're not planning to re-wire things very often? How does a patch panel actually work? Let's say it has 24 ports. Does it have another 24 ports on the backside that go to the switch, or what? Wikipedia isn't helpful on this. Clarification: I am planning to run network cables through conduits inside the walls and terminated with network sockets in the wall (as opposed to having just conduits and long regular network cables that have a normal plug in each end). Going by RedGrittyBrick's answer, a patch panel is nearly unavoidable in that case.

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• Windows Network File Transfer to Samba server: “Are you sure you want to copy this file without its properties?”

  - by jimp

  I am transferring a lot of files to a new NAS based on OpenMediaVault, with the Samba 3.5.6 service running. I am transferring from Windows 7 64-bit to the NAS, and on some media files Windows is prompting about losing some property data across the transfer. I have never seen this before when transferring to Samba boxes I have built myself (vs this turnkey solution), so I'm guessing there must be a Samba setting I can change to preserve the file properties in question instead of permanently losing whatever they contain (Date Taken? Exposure? Flash Fired? etc). Or maybe I've just never encountered this before; I'm really not sure. I tried adding ea support = yes and store dos attributes = yes to the [global] section, but the problem remains. The Linux file system is ext4 mounted with user_xattr (full options: defaults,acl,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0) as Samba requires. Any ideas would be greatly appreciated. Thank you! Samba config: [global] workgroup = WORKGROUP server string = %h server include = /etc/samba/dhcp.conf dns proxy = no log level = 2 syslog = 2 log file = /var/log/samba/log.%m max log size = 1000 syslog only = yes panic action = /usr/share/samba/panic-action %d encrypt passwords = true passdb backend = tdbsam obey pam restrictions = yes unix password sync = no passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . pam password change = yes socket options = TCP_NODELAY IPTOS_LOWDELAY guest account = nobody load printers = no disable spoolss = yes printing = bsd printcap name = /dev/null unix extensions = yes wide links = no create mask = 0777 directory mask = 0777 use sendfile = no null passwords = no local master = yes time server = yes wins support = yes ea support = yes store dos attributes = yes Note: I found this related question, but it explains the loss due to the user trying to transfer from NTFS to FAT32.

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• Can't install mysql 5.1 on a windows machine because the last install left artifacts.

  - by Zombies

  After uninstalling mysql 5.1 (64 bit version) I cannot install the win32 version! Apparently the devs felt it neccasery to leave helpful artifacts behind? I have rebooted my machine but no effect.. Running this: C:\Users\User1>net start mysql The MySQL service is starting. The MySQL service could not be started. A system error has occurred. System error 1067 has occurred. The process terminated unexpectedly. And ran this: C:\Program Files (x86)\MySQL\MySQL Server 5.1\bin>mysqld --console 100213 10:52:58 [Note] Plugin 'FEDERATED' is disabled. InnoDB: Error: log file .\ib_logfile0 is of different size 0 10485760 bytes InnoDB: than specified in the .cnf file 0 25165824 bytes! 100213 10:52:59 [ERROR] Plugin 'InnoDB' init function returned error. 100213 10:52:59 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 100213 10:52:59 [ERROR] Unknown/unsupported table type: INNODB 100213 10:52:59 [ERROR] Aborting 100213 10:52:59 [Note] mysqld: Shutdown complete Update: For some reason it looks like it is installing the 32bit DB into the old 64bit directoy.... will look into this... (the bin directory is going into the 32 bit program files directory).

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• DRBD setup problem

  - by cuthieu

  I'm so new to DRBD, please help me fixing the problem below. Enclosed my drbd.conf. Many thanks [root@skonkwerks1 ~]# drbdadm create-md all open(/dev/hdb3) failed: No such file or directory Command 'drbdmeta /dev/drbd0 v08 /dev/hdb3 internal create-md' terminated with exit code 20 drbdsetup exited with code 20 [root@skonkwerks1 ~]# vi /etc/drbd.conf global { usage-count no; } resource repdata { protocol C; startup { wfc-timeout 0; degr-wfc-timeout 120; } disk { on-io-error detach; } # or panic # net { cram-hmac-alg "hdd1"; shared-secret "testing"; } syncer { rate 10M; } on skonkwerks1 { device /dev/drbd0; disk /dev/hdb1; address 172.29.156.1:7788; meta-disk internal; } on skonkwerks2 { device /dev/drbd0; disk /dev/hdb1; address 172.29.156.2:7788; meta-disk internal; } }

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• CentOS 5 VPN Server won't work

  - by Miro Markarian

  I have a CentOS 5 server configured to be both a L2TP server and a PPTP server + a radius server for hosting the AAA. My problem is that, the L2TP works great and I can connect to it, but can't connect to PPTP and every-time it ends up with error #619 when it gets to the verifying username and password section. Here is the log I got from /var/log/messages Dec 17 07:40:02 serverdl pptpd[8570]: CTRL: Client 5.52.247.62 control connection started Dec 17 07:40:03 serverdl pptpd[8570]: CTRL: Starting call (launching pppd, opening GRE) Dec 17 07:40:03 serverdl pppd[8571]: Plugin radius.so loaded. Dec 17 07:40:03 serverdl pppd[8571]: RADIUS plugin initialized. Dec 17 07:40:03 serverdl pppd[8571]: Plugin radattr.so loaded. Dec 17 07:40:03 serverdl pppd[8571]: RADATTR plugin initialized. Dec 17 07:40:03 serverdl pppd[8571]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded. Dec 17 07:40:03 serverdl pppd[8571]: pptpd-logwtmp: $Version$ Dec 17 07:40:03 serverdl pppd[8571]: pppd 2.4.4 started by root, uid 0 Dec 17 07:40:03 serverdl pppd[8571]: Using interface ppp0 Dec 17 07:40:03 serverdl pppd[8571]: Connect: ppp0 <--> /dev/pts/2 Dec 17 07:40:03 serverdl pptpd[8570]: GRE: read(fd=7,buffer=80515e0,len=8260) from network failed: status = -1 error = Protocol not available Dec 17 07:40:03 serverdl pptpd[8570]: CTRL: GRE read or PTY write failed (gre,pty)=(7,6) Dec 17 07:40:03 serverdl pppd[8571]: Modem hangup Dec 17 07:40:03 serverdl pppd[8571]: Connection terminated. Dec 17 07:40:03 serverdl pppd[8571]: Exit. Dec 17 07:40:03 serverdl pptpd[8570]: CTRL: Client 5.52.247.62 control connection finished Just yesterday when I hadn't set up the L2TP yet PPTP was working great but then I uninstalled it and removed all it's config from /etc/* and installed L2TP first and then installed PPTP after it. and then it stopped to work. I believe it must be a radiusclient issue because both of the PPTP and L2TP services use radius to authenticate. And another thing I think must be the issue is that when assigning IPs to the PPP interfaces, I have done the following config. Is that right? For L2TP: localip 10.10.10.1 remoteip 10.10.10.2-254 For PPTP: localip 10.10.9.1 remoteip 10.10.9.2-254

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• using gmail as email relay for sendmail

  - by Nikita

  I used to be able to send emails using a gmail account & sendmail configured using one of the guides on the Internet, for example: http://appgirl.net/blog/configuring-sendmail-to-relay-through-gmail-smtp/ This is a small server and I've recently moved it to a different house. And sendmail has stop working. The only thing different in the network setup is a new router. What is happening: In the log files, I see the following error: ...stat=Deferred: smtp.gmail.com: No route to host When I run from the command line: strace sendmail -f A -t B -u "Subject" -m "Message" -tls=yes ssl=yes -s smtp.gmail.com:587 -xu A -xp XYZ It hangs on this call: recvfrom(3, "m0\201\203\0\1\0\0\0\0\0\0\4ares\3lan\0\0\34\0\1", 8192, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.254")}, [16]) = 26 close(3) = 0 time(NULL) = 1339997943 open("/etc/localtime", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=3477, ...}) = 0 fstat64(3, {st_mode=S_IFREG|0644, st_size=3477, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb76ff000 read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\4\0\0\0\0"..., 4096) = 3477 _llseek(3, -24, [3453], SEEK_CUR) = 0 read(3, "\nEST5EDT,M3.2.0,M11.1.0\n", 4096) = 24 close(3) = 0 munmap(0xb76ff000, 4096) = 0 socket(PF_FILE, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 3 connect(3, {sa_family=AF_FILE, path="/dev/log"}, 110) = 0 send(3, "<18>Jun 18 01:39:03 sendmail[268"..., 96, MSG_NOSIGNAL) = 96 nanosleep({60, 0}, So it looks like at some point it tries to resolve the DNS name, but I don't have anything running on 53, so it dies out and then just hangs. The other interesting thing is that msmtp works just fine on the same server. Update: ares in strace output is actually the name of my server, but .254 IP address is the address of the router. Could anyone tell me why this is happening or what further steps can I take to investigate the issue? Thanks!

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• Performance data collection for short-running, ephemeral servers

  - by ErikA

  We're building a medical image processing software stack, currently hosted on various AWS resources. As part of this application, we have a handful of long-running servers (database, load balancers, web application, etc.). Collecting performance data on those servers is quite simple - my go-to- recipe of Nagios (for monitoring/notifications) and Munin (for collection of performance data and displaying trends) will work just fine. However - as part of this application, we are constantly starting up and terminating compute instances on EC2. In typical usage, these compute instances start up, configure themselves, receive a job from a message queue, and then get to work processing that job, which takes anywhere from 15 minutes to over 8 hours. After job completion, these instances get terminated, never to be heard from again. What is a decent strategy for collecting performance data on these short-lived instances? I don't necessarily need monitoring on them - if they fail for whatever reason, our application will detect this and handle re-starting the job on another instance or raising the flag so an administrator can take a look at things. However, it still would be useful to collect information like CPU (user, idle, iowait, etc.), memory usage, network traffic, disk read/write data, etc. In our internal database, we track the instance ID of the machine that runs each job, and it would be quite helpful to be able to look up performance data for a specific instance ID for troubleshooting and profiling. Munin doesn't seem like a great candidate, as it requires maintaining a list of munin nodes in a text file - far from ideal for an environment with a high amount of churn, and for the short amount of time each node will be running, I'd rather keep the full-resolution data indefinitely than have RRD water down the data over time. In the end, my guess is that this will require a monitoring engine that: uses a database (MySQL, SQLite, etc.) for configuration and data storage exposes an API for adding/removing hosts and services Are there other things I should be thinking about when evaluating options? Perhaps I'm over-thinking this, though, and just ought to run sar at 1-minute intervals on these short-lived instances and collect the sar db files prior to termination.

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• Startup script for Red5 on Ubuntu 9.04

  - by user49249

  I am creating startup script for Red5 on Ubuntu. Red5 is installed in /opt/red5 Following is a working script on a CentOS Box on which Red5 is running [code] ==========Start init script ========== #!/bin/sh PROG=red5 RED5_HOME=/opt/red5/dist DAEMON=$RED5_HOME/$PROG.sh PIDFILE=/var/run/$PROG.pid # Source function library . /etc/rc.d/init.d/functions [ -r /etc/sysconfig/red5 ] && . /etc/sysconfig/red5 RETVAL=0 case "$1" in start) echo -n $"Starting $PROG: " cd $RED5_HOME $DAEMON >/dev/null 2>/dev/null & RETVAL=$? if [ $RETVAL -eq 0 ]; then echo $! > $PIDFILE touch /var/lock/subsys/$PROG fi [ $RETVAL -eq 0 ] && success $"$PROG startup" || failure $"$PROG startup" echo ;; stop) echo -n $"Shutting down $PROG: " killproc -p $PIDFILE RETVAL=$? echo [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$PROG ;; restart) $0 stop $0 start ;; status) status $PROG -p $PIDFILE RETVAL=$? ;; *) echo $"Usage: $0 {start|stop|restart|status}" RETVAL=1 esac exit $RETVAL [/code] What do I need to replace for Ubuntu in the above script. My Red5 is in /opt/red5/ and to start it manually I always do /opt/red5/dist/red5.sh from Ubuntu As I did not find rc.d/functions on Ubuntu on my laptop also /etc/init.d/functions I did not existed. I would like to be able to use them with service as Red hat distributions do. I checked /lib/lsb/init-functions.

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• Mongo daemon restarts after replica set issue

  - by Matt Beckman

  We had a recent election in our replica set (2 read nodes; 1 write node) that changed the primary node. Curious as to why this occurred, I started looking through the logs to find out what happened. It appears that mongoNode2 could not communicate with mongoNode3. When both nodes could not communicate, it appears that this caused the services on mongoNode2 and mongoNode3 to restart, eventually resulting in a new primary after the services had been started again. Thu Jun 23 08:27:28 [ReplSetHealthPollTask] DBClientCursor::init call() failed Thu Jun 23 08:27:28 [ReplSetHealthPollTask] replSet info mongoNode3:27017 is down (or \ slow to respond): DBClientBase::findOne: transport error: mongoNode3:27017 query: { \ replSetHeartbeat: "myReplSet", v: 3, pv: 1, checkEmpty: false, from: \ "mongoNode2:27017" } Thu Jun 23 08:27:29 got kill or ctrl c or hup signal 15 (Terminated), will \ terminate after current cmd ends Thu Jun 23 08:27:29 [interruptThread] now exiting Thu Jun 23 08:27:29 dbexit: Is there any reason that the mongo service would restart due to a DBClientCursor::init call() failure? Is this a known bug? It should be noted that mongoNode2 and mongoNode3 are VMs on the same VMware host. MongoNode1 is not on the same host, and it did not have any issues with the service. However, I did not have any other reports of issues with other VMs on the VMware host.

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• Why dd finishes instantly when pipelining to cat?

  - by agsamek

  I start bash on Cygwin and type: dd if=/dev/zero | cat /dev/null It finishes instantly. When I type: dd if=/dev/zero > /dev/null it runs as expected and I can issue killall -USR1 dd to see the progress. Why does the former invocation finishes instantly? Is it the same on a Linux box? * Explanation why I asked such stupid question and possibly not so stupid question I was compressing hdd images and some were compressed incorrectly. I ended up with the following script showing the problem: while sleep 1 ; do killall -v -USR1 dd ; done & dd if=/dev/zero bs=5000000 count=200 | gzip -c | gzip -cd | wc -c Wc should write 1000000000 at the end. The problem is that it does not on my machine: bash-3.2$ dd if=/dev/zero bs=5000000 count=200 | gzip -c | gzip -cd | wc -c 13+0 records in 12+0 records out 60000000 bytes (60 MB) copied, 0.834 s, 71.9 MB/s 27+0 records in 26+0 records out 130000000 bytes (130 MB) copied, 1.822 s, 71.4 MB/s 200+0 records in 200+0 records out 1000000000 bytes (1.0 GB) copied, 13.231 s, 75.6 MB/s 1005856128 Is it a bug or am I doing something wrong once again?

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• SQL Server log backups "stalling"

  - by MattK

  I have interited a box running SQL Server 2008 and Windows 2003, and have had a few events where largeish (35GB) log backups "stall", both before and after the installation of SQL 2008 SP1. The server log ships to a standby, so regular log backups are taken at 15 minute intervals. However, after an index reorg causes the log to grow to about 35GB (on a DB with about 17GB of data), the next log backup runs to ~95% completion, then seems to stop. The process shows as suspended, with a wait state of BACKUPIO. CPU, read, and write activity on the SPID also does not change, and the process stays in this state for hours, when normally a backup of this size should complete in about 20 minutes. This server has a single RAID-1 volume, thus the source database files and destination backup files are on the same volume. However, I cannot determine if another process is blocking the backup. The backup SPID cannot be killed, and the only way to terminate the log backup and clear the lock on the backup file is to cycle the SQL Server service. There was one event where the backup terminated completely, with an error that another process had locked the backup file, but no details about what that process was. Can anyone suggest a cause or diagnostic process to this situation?

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• Getting custom web.config sections and their contents in Powershell

  - by Rob

  I have a web application installed in c:\inetpub\wwwroot_Site1\AppName which has a custom section group and section as follows: <configSections> <sectionGroup name="Libraries"> <section name="Custom.Section.Name" type="System.Configuration.NameValueSectionHandler,system, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, Custom=null"/> <section name="Custom.Section.Name2" type="System.Configuration.NameValueSectionHandler,system, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, Custom=null"/> </sectionGroup> </configSections> I've written the following snippet of Powershell: Import-Module WebAdministration Get-WebConfiguration //Libraries IIS:\Sites\Site1\AppName Which correctly returns: Name         Sections                           Groups ====          ========                        =========== Libraries    Custom.Section.Name                   Custom.Section.Name2 What I can't fathom is how to, either via Get-WebConfiguration or Get-WebConfigurationProperty obtain access to the <add key="x" value="y" /> elements that are direct children of CustomSectionName in the actual "body" of the configuration file.

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• Looking for way to log process terminations on OS X (Mac)

  - by Stan Sieler

  I'm looking for a way to log all process terminations on my Mac (OS X 10.6.8). (And see pid, timestamp, process name) I've implemented something similar for HP-UX, but it required a kernel-level driver and intercepting several variations of "exit()" (the normal one, and the one invoked on behalf of a process while it's aborting). Why do I want the info? I've been seeing messages in my system log file (dmesg) like: CODE SIGNING: cs_invalid_page(0x1000): p=91550[GoogleSoftwareUp] clearing CS_VALID CODE SIGNING: cs_invalid_page(0x1000): p=92088[GoogleSoftwareUp] clearing CS_VALID Although dmesg lacks timestamps, apps/Utilities/Console : Database : all : search for CS_VALID shows that the messages appears about once every 58 1/2 minutes. I suspect the number after "p=" is a process id (pid) ... but for a process that has long since terminated by the time I see the message. So, if there was a process termination log mechanism that recorded the pid, the time of termination, the reason for termination, and the process name (at time of termination), that would probably allow me to determine who's causing those errors to be logged! (No, I'm not running Chrome on my Mac, and "ps -ef | grep -i goog" gets no hits either ... I'm not consciously running any Google apps on the Mac) thanks, Stan [email protected]

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• How do you get AWS VPC EC2 instances to be able to see the AWS APIs?

  - by Peter Mounce

  We're spinning up infrastructure inside of an AWS VPC via CloudFormation. We're using auto-scaling groups to bring up VPC-EC2 instances (so, we don't bring up instances directly; ASGs manage that). Inside of a PVC, EC2 instances only have a private IP; they cannot see the outside world without further work. When these instances spin up, we have some bootstrap tasks that require talking to the various AWS APIs. We also have some ongoing tasks that require AWS API traffic. How are you tackling this apparent chicken-egg problem? We've read about: NAT instances - but don't like this so much because it's another layer to our stack. assigning elastic-IPs to each VPC instance that needs to talk - but a) they all do, and b) since we're using ASGs, we don't know which instances to assign EIPs to at provision-time, and c) we'd need to set up something to monitor those ASGs and assign EIPs when instances are terminated and replaced spinning up an instance (actually, a load-balanced pair, probably spanning AZs) to act as an AWS-API proxy for all API traffic I guess I'm wondering whether there's some kind of back-door we can open that allows our VPC EC2 instances access to the AWS API endpoints, but nothing else, for cheap-complexity setup, that doesn't add another network-hop layer to our infrastructure for serving requests.

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• Error code 1005 (errno: 121) upon create table while restoring MySQL database from a dump

  - by Jonathan

  I have a linux prod machine and a Win7 64bit dev machine. My workflow includes dumping the production MySQL database on the linux machine and restoring it in my local MySQL database on the windows machine (using SQLyog). This worked fine for a long time. Following some trouble, I formatted and reinstalled my windows dev machine. Since then I'm unable to restore the db on it. I keep receiving the following error: Query: CREATE TABLE `auth_group` ( `id` int(11) NOT NULL auto_increment, `name` varchar(80) collate utf8_unicode_ci NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `name` (`name`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci Error occured at:2010-06-26 17:16:14 Line no.:30 Error Code: 1005 - Can't create table 'ap_site.auth_group' (errno: 121) Notice that this is the first create table statement in the sql dump file. This error occurs both on MySQL Community Server 5.1.41 and 5.1.48 and with SQLyog Community 8.0.4 and 8.5.1. I really don't know what's different in my configuration from before the reinstall and now and why does it have this effect. Restoring from sql dump is something I need to keep on doing, so I need a permanent fix and not a tailored workaround.

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• How to diagnose storage system scaling problems?

  - by Unknown

  We are currently testing the maximum sequential read throughput of a storage system (48 disks total behind two HP P2000 arrays) connected to HP DL580 G7 running RHEL 5 with 128 GB of memory. Initial testing has been mainly done by running DD-commands like this: dd if=/dev/mapper/mpath1 of=/dev/null bs=1M count=3000 In parallel for each disk. However, we have been unable to scale the results from one array (maximum throughput of 1.3 GB/s) to two (almost the same throughput). Each array is connected to a dedicated host bust adapter, so they should not be the bottleneck. The disks are currently in JBOD configuration, so each disk can be addressed directly. I have two questions: Is running multiple DD commands in parallel really a good way to test maximum read throughput? We have noticed very high SWAPIN-% numbers in iotop, which I find hard to explain because the target is /dev/null How shoud we proceed in trying to find the reason for the scaling problem? Do you thing the server itself is the bottleneck here, or could there be some linux parameters that we have overlooked?

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• Trouble getting started with the STEALTH monitoring package

  - by dlanced

  Is anyone here familiar with the Linux-based STEALTH package (for monitoring FS integrity of client systems)? I'm trying to get started with a very simple configuration, but I'm running into trouble (this is running under Ubuntu 14.04): Config line `USE BASE/root/stealth/10.0.0.79' invalid STEALTH (2.11.02) started at Fri, 30 May 2014 15:25:00 +0000 Program terminated due to non-zero exit value for -type f -exec /usr/bin/sha1sum {} \; (EOC Fri May 30 15:25:00 2014 127) Stealth is creating a binary tmp file in the Stealth server root and generating a "report" file in the start directory, but not much else. Regarding the "USE BASE...invalid" error, and just to be sure, I manually created the directories in /root, but it didn't help. And, by the way, I am running stealth with sudo. Everything seems to be configured correctly: I'm able to ssh into root@client from the stealth machine without a password Here's my "policy" file (I've removed the email directives just for simplicity): DEFINE SSHCMD /usr/bin/ssh [email protected] -T -q exec /bin/bash --noprofile DEFINE EXECSHA1 -xdev -perm +u+s,g+s ( -user root -or -group root ) \ -type f -exec /usr/bin/sha1sum {} \; USE BASE/root/stealth/10.0.0.79 USE SSH ${SSHCMD} USE DD /bin/dd USE DIFF /usr/bin/diff USE PIDFILE /var/run/stealth- USE REPORT report USE SH /bin/sh GET /usr/bin/sha1sum /root/tmp LABEL \nchecking the client's /usr/bin/find program CHECK LOG = remote/binfind /usr/bin/sha1sum /usr/bin/find LABEL \nsuid/sgid/executable files uid or gid root on the / partition CHECK LOG = remote/setuidgid /usr/bin/find / ${EXECSHA1} LABEL \nconfiguration files under /etc CHECK LOG = remote/etcfiles \ /usr/bin/find /etc -type f -not -perm /6111 \ -not -regex "/etc/(adjtime\|mtab)"\ -exec /usr/bin/sha1sum {} \; Any ideas? Thanks,

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• sys.dm_exec_query_stats interaction with recompilation

  - by Sam Saffron

  We use sys.dm_exec_query_stats to track down slow queries and queries that are IO offenders. This works great, we get a lot of very insightful stats. It is clear this is not as accurate as running a profiler trace, as you have no idea when SQL Server will decide to chuck out a an execution plan. We have quite a few queries where the wrong execution plan is cached. For example queries like the following: SELECT TOP 30 a.Id FROM Posts a JOIN Posts q ON q.Id = a.ParentId JOIN PostTags pt ON q.Id = pt.PostId WHERE a.PostTypeId = 2 AND a.DeletionDate IS NULL AND a.CommunityOwnedDate IS NULL AND a.CreationDate @date AND LEN(a.Body) 300 AND pt.Tag = @tag AND a.Score 0 ORDER BY a.Score DESC The problem is that the ideal plan really depends on the date selected (screenshot of ideal plan): However if the wrong plan is cached, it totally chokes when the date range is big: (notice the big fat lines) To overcome this we were recommended to use either OPTION (OPTIMIZE FOR UNKNOWN) or OPTION (RECOMPILE) OPTIMIZE FOR UNKNOWN results in a slightly better plan, which is far from optimal. Executions are tracked in sys.dm_exec_query_stats. RECOMPILE results in the best plan being chosen, however no execution counts and stats are tracked in sys.dm_exec_query_stats. Is there another DMV we could use to track stats on queries with OPTION (RECOMPILE)? Is this behavior by-design? Is there another way we can for recompilation while keeping stats tracked in sys.dm_exec_query_stats? Note: the framework will always execute parameterized queries using sp_executesql

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• xen + debian network after upgrade squeeze to wheeze

  - by rush

  I've got a Debian + Xen server. After a system upgrade to the stable version the network doesn't come up after boot. Every time after reboot I need to bring it up manually. The network configuration was not changed during upgrade. Here is /etc/network/interfaces: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 11.22.33.44 netmask 255.255.255.0 gateway 11.22.33.1 nameserver 8.8.8.8 After boot ip r shows no route and eth0 has no ip address. Manually ip and route setup goes fine and network starts working. Messages from dmesg about network I've found (looks like nothing interesting) [ 3.894401] ACPI: Fan [FAN3] (off) [ 3.894444] ACPI: Fan [FAN4] (off) [ 4.178348] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:1e:67:14:66:c9 [ 4.178351] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection [ 4.178392] e1000e 0000:00:19.0: eth0: MAC: 10, PHY: 11, PBA No: 0100FF-0FF [ 4.178413] e1000e 0000:02:00.0: Disabling ASPM L0s L1 [ 4.178432] xen: registering gsi 16 triggering 0 polarity 1 -- [ 4.223667] ata5: DUMMY [ 4.223668] ata6: DUMMY [ 4.289153] e1000e 0000:02:00.0: eth1: (PCI Express:2.5GT/s:Width x1) 00:1e:67:14:66:c8 [ 4.289155] e1000e 0000:02:00.0: eth1: Intel(R) PRO/1000 Network Connection [ 4.289245] e1000e 0000:02:00.0: eth1: MAC: 3, PHY: 8, PBA No: 1000FF-0FF [ 4.506908] usb 1-1: new high-speed USB device number 2 using ehci_hcd [ 4.542920] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) -- [ 10.362999] EXT4-fs (dm-23): mounted filesystem with ordered data mode. Opts: (null) [ 10.419103] EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: (null) [ 10.988255] ADDRCONF(NETDEV_UP): eth1: link is not ready [ 13.175533] Event-channel device installed. [ 13.287555] XENBUS: Unable to read cpu state -- [ 13.288670] XENBUS: Unable to read cpu state [ 13.965939] Bridge firewalling registered [ 14.134048] e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [ 14.283862] ADDRCONF(NETDEV_UP): peth0: link is not ready [ 14.284543] ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready [ 17.800627] e1000e: peth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [ 17.801377] ADDRCONF(NETDEV_CHANGE): peth0: link becomes ready [ 18.307278] device peth0 entered promiscuous mode [ 24.538899] eth1: no IPv6 routers present [ 28.570902] peth0: no IPv6 routers present I've upgraded two servers and I've such behaviour on two of them. How to fix this and get network starts automatically on boot?

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• How do I cancel windows server 2003 repair install?

  - by Kilgore2k

  System: Windows 2003 Server Enterprise Scenario: NTDS db is corrupt and all attempts to fix with esentutl fail. Ran chkdsk which seemed to repair disk error and give access to the ntds.dit file but still esentutl fails. (Attached the drive to a different server to run the esentutl) Error: Access to source database '[path to copy of]/ntds.dit' failed with Jet error -1022. Operation terminated with error -1022 (JET_errDiskIO, Disk IO error) after 0.170 seconds. This error occurs on any disk I cpoy the files to including original location in C:\WINDOWS\NTDS\ Now enter the "Stupid!" and "what was I thinking!?" part (must be the late hour...) Stupid: No updated backup - after using a backup I get a network password error in the lsass error. what was I thinking!?: Started the install repair from the original CD but the install fails since the AD fails to start. Now I cant boot into any mode (safe mode, AD restore etc) nor complete the repair install. I would really like to avoid a fresh install since I have the Exchange server on this DC and would rather migrate to a new server than have to start from scratch. Thanks!

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• logrotate: neither rotate nor compress empty files

  - by Andrew Tobey

  i have just set up an (r)syslog server to receive the logs of various clients, which works fine. only logrotate is still not behaving as intending. i want logrotate to create a new logfile for each day, but only to keep and store i.e. compress non-empty files. my logrotate config looks currently like this # sample configuration for logrotate being a remote server for multiple clients /var/log/syslog { rotate 3 daily missingok notifempty delaycompress compress dateext nomail postrotate reload rsyslog >/dev/null 2>&1 || true endscript } # local i.e. the system's very own logs: keep logs for a whole month /var/log/kern.log /var/log/kernel-info /var/log/auth.log /var/log/auth-info /var/log/cron.log /var/log/cron-info /var/log/daemon.log /var/log/daemon-info /var/log/mail.log /var/log/rsyslog /var/log/rsyslog-info { rotate 31 daily missingok notifempty delaycompress compress dateext nomail sharedscripts postrotate reload rsyslog >/dev/null 2>&1 || true endscript } # received i.e. logs from the clients /var/log/path-to-logs/*/* { rotate 31 daily missingok notifempty delaycompress compress dateext nomail } what i end up with is having is some sort of "summarized" files such as filename-datestampDay-Day and corresponding .gz files. What I do have are empty files, which are eventually zipped. so does the notifempty directive is in fact responsible for these DayX-DayY files, days on which really nothing happened? what would be an efficient way to drop both, empty log files and their .gz files, so that I eventually only keep logs/compressed files that truly contain data?

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