Develop Reference

Could not load org.jgroups.protocols.pbcast.GmsImpl$Request

I have no idea about this wrong when I use J2Cache:
INFO: Illegal access: this web application instance has been stopped already. Could not load org.jgroups.protocols.pbcast.GmsImpl$Request. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1612)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
at org.jgroups.protocols.pbcast.GMS.up(GMS.java:855)
at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:234)
at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:636)
at org.jgroups.protocols.BARRIER.up(BARRIER.java:103)
at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:147)
at org.jgroups.protocols.FD_ALL.up(FD_ALL.java:185)
at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:301)
at org.jgroups.protocols.MERGE2.up(MERGE2.java:209)
at org.jgroups.protocols.Discovery.up(Discovery.java:379)
at org.jgroups.protocols.TP.passMessageUp(TP.java:1412)
at org.jgroups.protocols.TP$MyHandler.run(TP.java:1598)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Jun 11, 2015 2:47:30 PM org.apache.catalina.connector.CoyoteAdapter log
WARNING: Exception while attempting to add an entry to the access log
java.lang.NullPointerException
at org.apache.catalina.connector.CoyoteAdapter.log(CoyoteAdapter.java:557)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:182)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
The above of this wrong happened with tomcat's starting.
I have googled about it.
Someone said:
If you use a QUIT signal on the Java process it should output a thread
dump that should identify which threads is still running and
preventing a proper shutdown. I have seen this on occasion with some
versions of HSQLDB that had a driver that didn't shutdown properly but
it could be anything else deployed in your install.
To send the QUIT signal : kill -QUIT JAVA_PID
where JAVA_PID is the process ID of your Java process you can retrieve
using : ps aux
But unfortunately, I can't understand it.
Can anybody help me?

This sounds familiar to this issue - https://issues.jboss.org/browse/JGRP-826. My guess is that tomcat already shuts down while there are still JGroups threads running. How do you shutdown Tomcat? Do you explicitly shutdown the cache as well? I would try implementing a ServletContextListener to receive a callback when the application gets shutdown. At this point I would try to explicitly close the cache as well. This all depends of course how and where you use the cache.

INFO: Illegal access: this web application instance has been stopped already. Could not load java.net.InetAddress

I'm experiencing this kind of exception, can someone help me about this problem?
java.lang.IllegalStateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1566)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.quartz.utils.UpdateChecker.getClientId(UpdateChecker.java:149)
at org.quartz.utils.UpdateChecker.buildParamsString(UpdateChecker.java:120)
at org.quartz.utils.UpdateChecker.buildUpdateCheckUrl(UpdateChecker.java:114)
at org.quartz.utils.UpdateChecker.doCheck(UpdateChecker.java:55)
at org.quartz.utils.UpdateChecker.checkForUpdate(UpdateChecker.java:47)
at org.quartz.utils.UpdateChecker.run(UpdateChecker.java:39)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
I'm also getting the same exception with Could not load java.net.URLEncoder and Could not load java.net.URLConnection. I'm using Eclipse Indigo SR1 and Tomcat V6.0

You can solve this problem after restarting the server, the server iscaching older version of the app.
see here

You cannot resolve this problem by "restarting the server".
The problem is that when you update your app by uploading a new version to Tomcat, some resource is not cleaned up properly. Could be anything from a runaway thread, to some kind of scheduled service, to a listener. When that process tries to load a class, Tomcat will detect and prevent it.
The solution to the problem is to properly keep track of, and on shutdown close, those threads.

I have also experienced this problem recently.
In my case the problem was generated by an unhandled exception in javax.servlet.ServletContextListener which was logged in one localhost-date.log.
Because of that exception the webapp was not deployed, but an already started java.util.concurrent.Executors was still running which caused another chain of exceptions in catalina-date.log:
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load WhatEver.class.
The solution for my case:
check all the Tomcat logs
fix exceptions in javax.servlet.ServletContextListener

I have faced the similar issue. I have solved by increasing the permsize of Server in the VM arguments -XX:MaxPermSize=1024m

Exception on Spring integration, when shut down the tomcat server

I have a Spring Integration application which runs on Tomcat 6. It has a message-driven-channel-adapter and it communicates with remote Active MQ server. So far so good I am able to do my work.
However when I shut down Tomcat I am getting the following exception endlessly looping in the catalina log:
Exception in thread "org.springframework.jms.listener.DefaultMessageListenerContainer#0-178" Exception in thread "org.springframework.jms.listener.DefaultMessageListenerContainer#0-179"
java.lang.NullPointerException
at org.apache.log4j.LogManager.getLogger(LogManager.java:188)
at org.apache.log4j.Logger.getLogger(Logger.java:104)
at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:289)
at org.apache.commons.logging.impl.Log4JLogger.trace(Log4JLogger.java:166)
at org.springframework.jms.support.JmsUtils.closeMessageConsumer(JmsUtils.java:158)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.clearResources(DefaultMessageListenerContainer.java:1111)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:971)
at java.lang.Thread.run(Thread.java:722)
java.lang.NullPointerException
at org.apache.log4j.LogManager.getLogger(LogManager.java:188)
at org.apache.log4j.Logger.getLogger(Logger.java:104)
at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:289)
at org.apache.commons.logging.impl.Log4JLogger.trace(Log4JLogger.java:166)
at org.springframework.jms.support.JmsUtils.closeSession(JmsUtils.java:115)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.clearResources(DefaultMessageListenerContainer.java:1112)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:971)
at java.lang.Thread.run(Thread.java:722)
Nov 13, 2012 7:23:37 PM org.apache.catalina.loader.WebappClassLoader loadClass
INFO: Illegal access: this web application instance has been stopped already. Could not load org.apache.log4j.spi.VectorWriter. The eventual following stack trace is ca
used by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1273)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at org.apache.log4j.spi.LoggingEvent.<init>(LoggingEvent.java:154)
at org.apache.log4j.Category.forcedLog(Category.java:388)
at org.apache.log4j.Category.log(Category.java:853)
at org.apache.commons.logging.impl.Log4JLogger.warn(Log4JLogger.java:234)
at org.springframework.jms.listener.DefaultMessageListenerContainer.handleListenerSetupFailure(DefaultMessageListenerContainer.java:831)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:981)
at java.lang.Thread.run(Thread.java:722)
Do you guys have any idea bout this? do i need to close or destroy Spring context before I shut down Tomcat?
Appreciate your help
Thanks,
Keth

Well, looks like you are correct:
do i need to close or destroy Spring context before I shut down Tomcat?
From Spring JSM source code it looks like your Tomcat closes its log4j.LogManager earlier, than Spring stops its context.

java.lang.IllegalStateException. Possible error with WebClassLoader

I'm developing a web application with Spring and I have this strange error. I can't figure out where it comes from, I've been google'ing hard and found nothing so far.
In the project I'm using: MongoDB, Spring, WSS4J (X.509 security headers for soap), Apache CXF. I've been trying to discover whether there is something that causes this error, any particular action, behaviour, condition something, but I found nothing so far, sometimes it happens after 3 min of running sometimes after 3h or not at all, any clues and hints appreciated.
INFO: Illegal access: this web application instance has been stopped already. Could not load net.sf.ehcache.store.disk.Segment$1. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1597)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
at net.sf.ehcache.store.disk.Segment$HashIterator.<init>(Segment.java:988)
at net.sf.ehcache.store.disk.Segment.hashIterator(Segment.java:936)
at net.sf.ehcache.store.disk.DiskStore$HashIterator.<init>(DiskStore.java:1038)
at net.sf.ehcache.store.disk.DiskStore$KeyIterator.<init>(DiskStore.java:1111)
at net.sf.ehcache.store.disk.DiskStore$KeyIterator.<init>(DiskStore.java:1111)
at net.sf.ehcache.store.disk.DiskStore$KeySet.iterator(DiskStore.java:949)
at net.sf.ehcache.store.disk.DiskStorageFactory$DiskExpiryTask.run(DiskStorageFactory.java:838)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)`

It means the ehcache thread is trying to interact with the application after the application has been stopped or redeployed. It happens only when ehcache reach limits you have in ehcache.xml and trying to overflow to disk.
Look at tomcat logs for warnings when stop your application:
SEVERE: The web application [/APP] appears to have started a thread
named [Ehcache_Worker-1] but has failed to stop it.
This is very likely to create a memory leak
If find something like this, you should stop ecache properly in your ServletContextListener:
public void contextDestroyed(ServletContextEvent servletContextEvent){
CacheManager.getInstance().shutdown();
}
maybe with 1 sec sleep after that, to be sure ehcache is stopped.
As mentioned in http://ehcache.org/documentation/faq
If the JVM keeps running after you stop using Ehcache, you should call
CacheManager.getInstance().shutdown() so that the threads are stopped
and cache memory is released back to the JVM. Calling shutdown also
insures that your persistent disk stores get written to disk in a
consistent state and will be usable the next time they are used. If
the CacheManager does not get shut down, it should not be a problem.
There is a shutdown hook which calls the shutdown on JVM exit.
Or you can set property overflowToDisk="false" in ehcache.xml or restart tomcat every time you deploy apllication.

web instance already stopped

i get this error
Mar 22, 2011 12:36:01 AM org.apache.catalina.loader.WebappClassLoader findResourceInternal
INFO: Illegal access: this web application instance has been stopped already. Could not load META-INF/services/javax.xml.parsers.DocumentBuilderFactory. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
Mar 22, 2011 12:36:01 AM org.apache.catalina.loader.WebappClassLoader loadClass
INFO: Illegal access: this web application instance has been stopped already. Could not load com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1562)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
at javax.xml.parsers.FactoryFinder.getProviderClass(Unknown Source)
at javax.xml.parsers.FactoryFinder.newInstance(Unknown Source)
at javax.xml.parsers.FactoryFinder.find(Unknown Source)
at javax.xml.parsers.DocumentBuilderFactory.newInstance(Unknown Source)
at com.xmlparser.XmlParser.parseXmlFile(XmlParser.java:33)
at com.xmlparser.XmlParser.<init>(XmlParser.java:25)
at com.jobs.SendRoutineMessagesJob.execute(SendRoutineMessagesJob.java:29)
at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
could some one please guide me as to what mistake i am committing here. i am not sure if i would need to paste the source code as well.

This because of you are deploying new instance of your application to server but the some thread or connection of previous instance attempts doing some business logic you have written. That's why, the main part of JVM called ClassLoader informs you about "Illegal access: this web application instance has been stopped already" and throws appropriate exception ... You can switch off auto deploy feature of Application Server which preferable on Production Environment and after deploying application restart server manually. Or you can in Class level control Servlet Life Cycle :))) during "pre deploy" close all connection or stop some threads. Or use sophisticated way controlling Threads with ManagedExecutorService. Good luck!!!

seems like i was creating instance of something which was already created..i removed the instance and now it works fine

Are you using Netbeans? I had a similar error except it was could not load oracle.sql.lnxlib. Like many posters have pointed out, this error usually has to do with Tomcat caching multiple instances of the application. A coworker was able to solve the problem for me by undeploying old instances of the application within Netbeans. To do so, go to the Services Tab > Servers and then double click on Apache Tomcat or TomEE and after running the application once since opening netbeans, a Web Applications Folder should appear. If you double click on that, you should see instances of your application appear. You should be able to right click them and then click undeploy (you may have to right click them and hit stop first). Finally, you should stop and then start tomcat before building and running your application.
Hope this helps.
See attached screenshot for clarity

If you use gradle there is an error
Illegal access: this web application instance has been stopped already. Could not load [].
The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
You can change mysql-connect-java to
mysql: mysql-connector-java: 8.0.13
Good luck

I got this error on Tomcat on an Ubuntu server ....finally resolved it by doing a Tomcat shutdown with "systemctl stop tomcat" and then "sudo reboot" and then once the box came back up, starting Tomcat again