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  • if (self = [super init]) vs. if ((self = [super init]))

    - by JOM
    Was just doing a code review and started to wonder: I thought if (self = [super init]) checks whether assigning return value of [super init] to variable self was successful or not (value of operation). Thus (self = nil) would actually be TRUE. I thought if ((self = [super init])) checks what is the value of self after assignment (value of variable). Thus ((self = nil)) would be FALSE. Which one is the correct way to use when initializing your own classes? Apple documentation uses the former one (for example here), which style I'm actually using now.

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  • About rw init=/bin/bash

    - by triedtoomuck
    I am a linux newbie so excuse me if I ask silly things. I recently find out that if I edit GRUB before booting and I add rw init=/bin/bash I end up with a root shell. Being in a condition that I want to understand everything I would like to know why this happens. I mean is it a bug? is it a feature? is it there to help admins to fix things as it only works if you have physical access to a computer? Which part are we exploiting? GRUB or the actual kernel? Sorry for asking a lot of things.

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  • WINEHQ - wine_gecko won't init - HTML Rendering disabled

    - by Nick
    Hello Super Users, I'm currently trying to get a windows compiled program to work through Wine to run on Linux and MacOSX. When I run the program through wine, it prompts me to install Gecko which I do. Later on in the program, it attempts to use MSHTML to render HTML but I get these error messages on my console instead. err:mshtml:init_xpcom NS_InitXPCOM2 failed: 80004005 err:mshtml:HTMLDocument_Create Failed to init Gecko, returning CLASS_E_CLASSNOTAVAILABLE fixme:ole:CoCreateInstance no instance created for interface {00000000-0000-0000-c000-000000000046} of class {25336920-03f9-11cf-8fd0-00aa00686f13}, hres is 0x80040111 I'm using Wine 1.1.34 and a similar bug was supposedly fixed in 1.1.33 http://bugs.winehq.org/show_bug.cgi?id=12578 I've been at this all afternoon, is there anything I'm missing? Thanks, Nick

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  • Configure Supervisor to manage init.d services

    - by Eduard Luca
    I installed uwsgi and created a bash script, which allows me to start/stop uwsgi in the following manner: service uwsgi [start|stop]. This bash script is located in /etc/init.d/uwsgi. Now, I want to (politely) ask Supervisor to use that script to manage the uwsgi process. All the tutorials indicate that this is not the way to do it, however I do want to be able to do both service uwsgi stop and supervisorctl stop uwsgi (not sure if I nailed the syntax of the latter) -- even though I am aware that the first one will not in fact stop my service because supervisor will restart it (that's exactly what I need). Note that I'm using uwsgi in emperor mode if that matters in any way.

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  • Puppet: Could not find init script for 'squid'

    - by chris
    I'm using Puppet to install ufdbGuard which requires Squid 2.7 (which is correctly installed and working properly). Here is the relevant class: class pns_client::squid { package { 'squid': ensure => present, before => File['/etc/squid/squid.conf'], } if $::ufdbguard_installed == "true" { $squidconf = 'puppet:///modules/pns_client/squid.conf_ufdbguard' } else { $squidconf = 'puppet:///modules/pns_client/squid.conf' } notify{$squidconf:} file { '/etc/squid/squid.conf': ensure => file, mode => 644, source => $squidconf, } service { 'squid': ensure => running, enable => true, hasrestart => true, hasstatus => true, subscribe => File['/etc/squid/squid.conf'], } } When running, I get this error: err: /Stage[main]/Pns_client::Squid/Service[squid]: Could not evaluate: Could not find init script for 'squid' This happens on all freshly-installed Debian 6 and Unbuntu 10.04/11.04 machines. Any ideas?

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  • Run command on init and restart on errors

    - by chersanya
    I have internet access on my PC through proxy through SSH, so every time I need to execute ssh -L PORT:SERVER:PORT LOGIN@SERVER and then type a password. After each network failure or reconnect this command has to be executed again. I've got bored of it and look for a way to do this automatically: first run this after boot (it doesn't seem to be a problem - put this command in some init file and that's all) and then rerun it (if possible, then type password) on each network failure. Is it possible, and how? OS Linux (Debian)

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  • Issue with InnoDB engine while enabling and [ skip-innodb ] - [ERROR] Plugin 'InnoDB' init function returned error

    - by Ahn
    How to enable InnoDB, which was previously disabled with skip-innodb option. Case 1: Disabled the innodb with skip-innodb option and show engines givens as below. Engine | Support ... | InnoDB | NO ...... Case 2: As I want to enable the innodb, I commanded the #skip-innodb option and restarted. But now the show engines even not showing the InnoDB engine in the list. ? Mysql Version : 5.1.57-community-log OS : CentOS release 5.7 (Final) Log: 120622 13:06:36 InnoDB: Initializing buffer pool, size = 8.0M 120622 13:06:36 InnoDB: Completed initialization of buffer pool InnoDB: No valid checkpoint found. InnoDB: If this error appears when you are creating an InnoDB database, InnoDB: the problem may be that during an earlier attempt you managed InnoDB: to create the InnoDB data files, but log file creation failed. InnoDB: If that is the case, please refer to InnoDB: http://dev.mysql.com/doc/refman/5.1/en/error-creating-innodb.html 120622 13:06:36 [ERROR] Plugin 'InnoDB' init function returned error. 120622 13:06:36 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 120622 13:06:36 [Note] Event Scheduler: Loaded 0 events 120622 13:06:36 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.57-community-log' socket: '/data/mysqlsnd/mysql.sock1' port: 3307 MySQL Community Server (GPL)

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  • Percona-server time out on /etc/init.d/mysql start

    - by geekmenot
    Every time I start mysql, using /etc/init.d/mysql start or service mysql start, it always times out. * Starting MySQL (Percona Server) database server mysqld [fail] However, I can get into mysql. Just wanted to know if there is a problem with the install because it happens all the time, not a one off error. mysql-error.log shows: 121214 11:25:56 mysqld_safe Starting mysqld daemon with databases from /data/mysql/ 121214 11:25:56 [Note] Plugin 'FEDERATED' is disabled. 121214 11:25:56 InnoDB: The InnoDB memory heap is disabled 121214 11:25:56 InnoDB: Mutexes and rw_locks use GCC atomic builtins 121214 11:25:56 InnoDB: Compressed tables use zlib 1.2.3 121214 11:25:56 InnoDB: Using Linux native AIO 121214 11:25:56 InnoDB: Initializing buffer pool, size = 14.0G 121214 11:25:58 InnoDB: Completed initialization of buffer pool 121214 11:26:01 InnoDB: Waiting for the background threads to start 121214 11:26:02 Percona XtraDB (http://www.percona.com) 1.1.8-rel29.2 started; log sequence number 9333955393950 121214 11:26:02 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306 121214 11:26:02 [Note] - '0.0.0.0' resolves to '0.0.0.0'; 121214 11:26:02 [Note] Server socket created on IP: '0.0.0.0'. 121214 11:26:02 [Note] Slave SQL thread initialized, starting replication in log 'mysql-bin.005163' at position 624540946, relay log '/data/mysql/mysql-relay-bin.000043' position: 624541092 121214 11:26:02 [Note] Slave I/O thread: connected to master '[email protected]:3306',replication started in log 'mysql-bin.005180' at position 823447620 121214 11:26:02 [Note] Event Scheduler: Loaded 0 events 121214 11:26:02 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.5.28-29.2-log' socket: '/data/mysql/mysql.sock' port: 3306 Percona Server (GPL), Release 29.2

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  • Openbsd init script for ssh VPN tunnel

    - by manthis
    I have a server hosting SSH tunnels and Openbsd 4.5 clients connecting to it. Things work just fine but I am in the need of automating the connection from the client to the server. So that if the client is accidentally rebooted, then the connection initiates unattended. So it should be as straight forward as to include the ssh connection in an init script. However I have miserably failed to do so by including it to /etc/rc.local, which is the file I usually do this sort of things in. Right now I am using autossh to also restart the connection if necessary and the script that I put on /etc/rc.local follows: #!/bin/sh # # Example script to start up tunnel with autossh. # # This script will tunnel 2200 from the remote host # to 22 on the local host. On remote host do: # ssh -p 2200 localhost # # $Id: autossh.host,v 1.6 2004/01/24 05:53:09 harding Exp $ # ID=root HOST=example.com #AUTOSSH_POLL=600 #AUTOSSH_PORT=20000 #AUTOSSH_GATETIME=30 #AUTOSSH_LOGFILE=$HOST.log #AUTOSSH_DEBUG=yes #AUTOSSH_PATH=/usr/local/bin/ssh export AUTOSSH_POLL AUTOSSH_LOGFILE AUTOSSH_DEBUG AUTOSSH_PATH AUTOSSH_GATETIME AUTOSSH_PORT autossh -2 -f -M 20000 ${ID}@${HOST} The script detaches just fine when run manually so I just include it on /etc/rc.local as echo -n 'starting local daemons:' if [ -x /usr/local/sbin/autossh.sh ]; then echo -n 'ssh tunnel' /usr/local/sbin/autossh.sh fi echo '.' I have also tried calling it from /etc/hostname.tun0 in case there may be issues with /etc/rc.local not being called at the right time when network connections are ready, so I would use: inet 10.254.254.2 255.255.255.252 10.254.254.1 !/usr/local/sbin/autossh.sh Your input is highly appreciated.

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  • class, dict, self, init, args ?

    - by kame
    class attrdict(dict): def __init__(self, *args, **kwargs): dict.__init__(self, *args, **kwargs) self.__dict__ = self a = attrdict(x=1, y=2) print a.x, a.y b = attrdict() b.x, b.y = 1, 2 print b.x, b.y Could somebody explain the first four lines in words? I read about classes and methods. But here it seems very confusing.

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  • Init Startup of Tomcat

    - by azoor
    Hi I put a init script into /etc/init.d to startup the Apache-tomcat. when i'm reboot the machine. i think the Tomcat try to start and aborted in some level. i am using Ubuntu 9.04. my guessing is the given time to start the tomcat is not enough. if any way have to increase the time to execute a script in startup.

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  • Why should I call self=[super init]

    - by Michael
    Let's say I create my class and its init method. Why should I call and return value of superclass init assigned to self? Which cases it covers? I would appreciate examples why would I need it for Cocoa superclass and non-Cocoa.

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  • Why is my system freezing when I switch users

    - by ZeroDivide
    Hello I've recently upgraded from 13.04 to 13.10 64bit. I'm running AMD graphics with the proprietary drivers. I have two user accounts. Mine(administrator) and my girlfriend's(standard) My girlfriend clicks "switch user" from my lock screen and logs in fine. I then try to click "switch user" from her lock screen and everything goes black. Then the monitor blinks on and off with just a single cursor. I have no way to access the terminal, the system is unresponsive and I have to hit the power button. Even ctrl + alt + f4 or ctrl + alt + t doesn't get me a terminal. When I press the power button on my system, it does start printing out the shutdown sequence on the monitor. Here is my .xsession-errors Script for ibus started at run_im. Script for auto started at run_im. Script for default started at run_im. Here is hers: init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd main process ended, respawning init: at-spi2-registryd respawning too fast, stopped init: logrotate main process (4726) killed by TERM signal init: upstart-dbus-session-bridge main process (4865) terminated with status 1 init: gnome-settings-daemon main process (4843) terminated with status 1 init: gnome-session main process (4852) terminated with status 1 init: unity-panel-service main process (4863) killed by KILL signal I found some advice in a forum to look for at-spi2-registryd in my system logs. Perhaps it will be useful. executing this: sudo grep -r at-spi2-registryd /var/log/* produces this: /var/log/lightdm/x-1-greeter.log:** (at-spi2-registryd:4384): WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files /var/log/lightdm/x-1-greeter.log:** (at-spi2-registryd:4384): WARNING **: Unable to register client with session manager /var/log/lightdm/x-2-greeter.log.old:** (at-spi2-registryd:7447): WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files /var/log/lightdm/x-2-greeter.log.old:** (at-spi2-registryd:7447): WARNING **: Unable to register client with session manager /var/log/lightdm/x-0-greeter.log:** (at-spi2-registryd:1378): WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files /var/log/lightdm/x-0-greeter.log:** (at-spi2-registryd:1378): WARNING **: Unable to register client with session manager /var/log/lightdm/x-0-greeter.log.old:** (at-spi2-registryd:1357): WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files /var/log/lightdm/x-0-greeter.log.old:** (at-spi2-registryd:1357): WARNING **: Unable to register client with session manager Any ideas what is going on?

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  • Call a non member function on an instance before is constructed.

    - by Tom
    Hi everyone. I'm writing a class, and this doubt came up. Is this undef. behaviour? On the other hand, I'm not sure its recommended, or if its a good practice. Is it one if I ensure no exceptions to be thrown in the init function? //c.h class C{ float vx,vy; friend void init(C& c); public: C(); }; //c.cpp C::C() { init(*this); } void init(C& c) //throws() to ensure no exceptions ? { c.vx = 0; c.vy = 0; } Thanks in advance

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  • Call a non member funcion on an instance before is constructed.

    - by Tom
    Hi everyone. I'm writing a class, and this doubt came up. Is this undef. behaviour? On the other hand, I'm not sure its recommended, or if its a good practice. Is it one if I ensure no exceptions to be thrown in the init function? //c.h class C{ float vx,vy; friend void init(C& c); public: C(); ~C(); }; //c.cpp C::C() { init(*this); } void init(C& c) //throws() to ensure no exceptions ? { c.vx = 0; c.vy = 0; } Thanks in advance

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  • Starting/Stopping Custom PHP Chat Server Linux Service (CentOS)

    - by chad
    I have been trying all night to get this service working properly. I created this script from a template and am very new to bash coding. I wrote a fully functioning chat server in php which runs endlessly, but now want to make it a dedicated service. I want to do this so that it starts on server boot and boots back up if possible when there are any down-times with the server. The issue is that I need this thing to run in a detached screen so that I can monitor packet data or send server commands via SSH when need-be. The main problem that i'm having is that it needs to have its own PID when it starts so that I can stop/restart it when needed. I am the type who grinds on coding until I figure it out, but this is so new to me that it seems the learning curve here is very steep and frustrating. Below is my code if anybody can please help me with this one, i've gotten so tired I can't even concentrate any more :( #!/bin/sh # # chatserver # # chkconfig: 345 20 90 # description: chatServer Linux Service Daemon \ # for general server handling ### BEGIN INIT INFO # Provides: chatserver # Required-Start: $local_fs $network $named $syslog # Required-Stop: $local_fs $syslog # Default-Start: 3 4 5 # Default-Stop: 0 1 2 6 # Short-Description: This service maintains the chatServer # Description: chatServer Linux Service Daemon # for general server handling ### END INIT INFO # Source function library. . /etc/rc.d/init.d/functions exec="screen php -q /var/www/html/chatServer.php" prog="chatserver" config="/etc/sysconfig/$prog" pidfile="/var/run/chatserver.pid" [ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog lockfile=/var/lock/subsys/$prog start() { #$exec || exit 5 echo -n $"Starting $prog: " daemon $exec --name=$exec --pidfile=$pidfile retval=$? echo [ $retval -eq 0 ] && touch $lockfile return $retval } stop() { echo -n $"Stopping $prog: " killproc -p $pidfile rm -f $pidfile retval=$? echo [ $retval -eq 0 ] && rm -f $lockfile return $retval } restart() { stop start } reload() { restart } force_reload() { restart } rh_status() { # run checks to determine if the service is running or use generic status status $prog } rh_status_q() { rh_status >/dev/null 2>&1 } case "$1" in start) rh_status_q && exit 0 $1 ;; stop) rh_status_q || exit 0 $1 ;; restart) $1 ;; reload) rh_status_q || exit 7 $1 ;; force-reload) force_reload ;; status) rh_status ;; condrestart|try-restart) rh_status_q || exit 0 restart ;; *) echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}" exit 2 esac exit $?

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  • When I auto-start Supervisord on boot, the [program:start_gunicorn] don't start

    - by Charlesliam
    The [program:start_gunicorn] is running with no error when I manually start supervisord with this setup. [program:start_gunicorn] command=/env/nafd/bin/gunicorn_start priority=1 autostart=true autorestart=unexpected user=nafd_it redirect_stderr=true stdout_logfile=/env/nafd/logs/gunicorn_supervisor.log stderr_logfile=/env/nafd/logs/gunicorn_supervisor_err.log I successfully run this init script for my supervisord. But when I used auto-start init script for supervisord the gunicorn is not running. ]# service gunicorn status gunicorn: unrecognized service What do I need to do to make the [program:start_gunicorn] run when using auto-start supervisord on boot? Here's my gunicorn config. /env/nafd/bin/gunicorn_start #!/bin/bash NAME="nafd_proj" DJANGODIR=/env/nafd/nafd_proj SOCKFILE=/env/nafd/run/gunicorn.sock NUM_WORKERS=1 DJANGO_SETTINGS_MODULE=nafd_proj.settings DJANGO_WSGI_MODULE=nafd_proj.wsgi echo "Starting $NAME as 'NAFD Web Server'" source /env/nafd/bin/activate export DJANGO_SETTINGS_MODULE=$DJANGO_SETTINGS_MODULE export PYTHONPATH=$DJANGODIR:$PYTHONPATH RUNDIR=$(dirname $SOCKFILE) test -d $RUNDIR || mkdir -p $RUNDIR cd /env/nafd/nafd_proj exec ../bin/gunicorn ${DJANGO_WSGI_MODULE}:application --bind=127.0.0.1:8001 \ --name $NAME \ --workers $NUM_WORKERS \ --log-level=debug \` Any idea is really appreciated.

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  • How to debug old initd script under systemd?

    - by Gene Vincent
    I have an older initd script to start my application. It worked fine under older versions of SuSE, but fails on Open SuSE 12.3. The strange thing is cd /etc/init.d ; ./script start works fine. /etc/init.d/script start shows a redirection to systemctl, but doesn't start my application (and also doesn't show any output from the initd script). I don't see any log entries showing me what goes wrong. The only entry I see is in /var/log/messages saying the application was started. How do I debug this ?

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  • Difference between two ways of installing tomcat as a service (Linux)

    - by varesa
    I am installing tomcat on a linux server, and would want it to be available as a service. I have found two different ways to achieve this. The first one is to copy the daemon.sh from $CATALINA_HOME/bin to /etc/init.d, and the other one I have seen is to create a simple init script that class $CATALINA_HOME/bin/startup.sh, etc. Startup.sh calls catalina.sh. The contents of the daemon.sh and startup.sh look very similar (at least for the env variables, and stuff like that). Daemon.sh calls jsvc in the end. Catalina.sh calls java. What is the (practical) difference between using the two of these when setting up tomcat as a service?

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  • jax-ws on glassfish3 init method

    - by Alex
    Hi all, I've created simple jax-ws (anotated Java 6 class to web service) service and deploied it on glassfish v3. The web.xml <?xml version="1.0" encoding="ISO-8859-1"?> <web-app> <servlet> <servlet-name>MyServiceName</servlet-name> <description>Blablabla</description> <servlet-class>com.foo-bar.somepackage.TheService</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>MyServiceName</servlet-name> <url-pattern>/MyServiceName</url-pattern> </servlet-mapping> <session-config> <session-timeout>30</session-timeout> </session-config> </web-app> There is no sun-jaxws.xml in the war. The service works fine but I have 2 issues: I'm using apache common configuration package to read my configuration, so i have init function that calls configuration stuff. 1. How can I configure init method for jaxws service (like i can do for the servlets for example) 2. the load on startup parameter is not affecting the service, I see that for every request init function called again (and c-tor). How can I set scope for my service? Thanks a lot,

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  • javax.servlet.ServletException: Servlet.init() for servlet Relay threw exception

    - by Talha Bin Shakir
    I built application by using Netbeans and its working fine. But When i deployed on TOMCAT I am getting this error javax.servlet.ServletException: Servlet.init() for servlet Relay threw exception org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) java.lang.Thread.run(Thread.java:636) *root cause* java.security.AccessControlException: access denied (java.util.PropertyPermission jasper.reports.compile.class.path write) java.security.AccessControlContext.checkPermission(AccessControlContext.java:342) java.security.AccessController.checkPermission(AccessController.java:553) java.lang.SecurityManager.checkPermission(SecurityManager.java:549) java.lang.System.setProperty(System.java:744) com.servlet.Relay.init(Relay.java:38) javax.servlet.GenericServlet.init(GenericServlet.java:212) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:616) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:537) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:115) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) Any Idea.

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