Chris Wesdorp created JCR-3707:
----------------------------------
Summary: deadlock on calling login
Key: JCR-3707
URL: https://issues.apache.org/jira/browse/JCR-3707
Project: Jackrabbit Content Repository
Issue Type: Bug
Components: jackrabbit-core
Affects Versions: 2.6.3
Environment: Glassfish 3.0.1
Java 6
1x 3Ghz Processor
Windows Server 2003 R2
Reporter: Chris Wesdorp
In our scenario we often encounter deadlocks in JackRabbit when the repository
is accessed when using the RepositoryFactory.
The code to get a connection as followed and can be executed concurrent in
different threads.
{noformat}
Map<String, String> parameters = new HashMap<String, String>();
parameters.put(Constants.REPOSITORY_URI_PROPERTY,
configuration.getRepositoryLocation());
Iterator<RepositoryFactory> iterator = ServiceRegistry
.lookupProviders(RepositoryFactory.class);
while (iterator.hasNext()) {
RepositoryFactory factory = iterator.next();
repository = factory.getRepository(parameters);
if (repository != null) {
// We found the requested repository!
break;
}
}
{noformat}
Then from the JVisualVM the following thread dumps are taken. First the thread
holding the lock
{noformat}
"http-thread-pool-8080-(2)" - Thread t@92
java.lang.Thread.State: WAITING on
java.util.concurrent.locks.ReentrantLock$NonfairSync@19f1675 owned by:
http-thread-pool-8080-(14)
at sun.misc.Unsafe.park(Native Method)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
at
java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
at
org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:194)
at org.apache.jackrabbit.core.ItemImpl.perform(ItemImpl.java:91)
at org.apache.jackrabbit.core.ItemImpl.getPath(ItemImpl.java:376)
at
org.apache.jackrabbit.core.security.user.UserManagerImpl.getAuthorizable(UserManagerImpl.java:821)
at
org.apache.jackrabbit.core.security.user.UserManagerImpl.internalGetAuthorizable(UserManagerImpl.java:908)
at
org.apache.jackrabbit.core.security.user.UserManagerImpl.getAuthorizable(UserManagerImpl.java:478)
at
org.apache.jackrabbit.core.security.principal.DefaultPrincipalProvider.providePrincipal(DefaultPrincipalProvider.java:124)
at
org.apache.jackrabbit.core.security.principal.AbstractPrincipalProvider.getPrincipal(AbstractPrincipalProvider.java:112)
- locked
org.apache.jackrabbit.core.security.principal.DefaultPrincipalProvider@e4359f
at
org.apache.jackrabbit.core.security.simple.SimpleLoginModule.getPrincipal(SimpleLoginModule.java:95)
at
org.apache.jackrabbit.core.security.authentication.AbstractLoginModule.login(AbstractLoginModule.java:319)
at
org.apache.jackrabbit.core.security.authentication.LocalAuthContext.login(LocalAuthContext.java:86)
at
org.apache.jackrabbit.core.RepositoryImpl.login(RepositoryImpl.java:1465)
at
org.apache.jackrabbit.commons.AbstractRepository.login(AbstractRepository.java:135)
at
org.apache.jackrabbit.server.SessionProviderImpl.getSession(SessionProviderImpl.java:86)
at
org.apache.jackrabbit.server.jcr.JCRWebdavServer$SessionCache.getRepositorySession(JCRWebdavServer.java:337)
at
org.apache.jackrabbit.server.jcr.JCRWebdavServer$SessionCache.get(JCRWebdavServer.java:232)
at
org.apache.jackrabbit.server.jcr.JCRWebdavServer$SessionCache.access$200(JCRWebdavServer.java:165)
at
org.apache.jackrabbit.server.jcr.JCRWebdavServer.attachSession(JCRWebdavServer.java:103)
at
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:275)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at
org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at
com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at
org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at
com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:239)
at
com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at
com.sun.grizzly.comet.CometEngine.executeServlet(CometEngine.java:481)
at com.sun.grizzly.comet.CometEngine.handle(CometEngine.java:342)
at
com.sun.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:84)
at
com.sun.grizzly.arp.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:161)
at
com.sun.grizzly.arp.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:137)
at
com.sun.grizzly.arp.AsyncProcessorTask.doTask(AsyncProcessorTask.java:88)
at com.sun.grizzly.http.TaskBase.run(TaskBase.java:189)
at
com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at
com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:619)
Locked ownable synchronizers:
- locked java.util.concurrent.locks.ReentrantLock$NonfairSync@1c4c77a
{noformat}
And secondly (one of) the thread that is stopped
{noformat}
"http-thread-pool-8080-(2)" - Thread t@92
java.lang.Thread.State: WAITING on
java.util.concurrent.locks.ReentrantLock$NonfairSync@19f1675 owned by:
http-thread-pool-8080-(14)
at sun.misc.Unsafe.park(Native Method)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
at
java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
at
org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:194)
at org.apache.jackrabbit.core.ItemImpl.perform(ItemImpl.java:91)
at org.apache.jackrabbit.core.ItemImpl.getPath(ItemImpl.java:376)
at
org.apache.jackrabbit.core.security.user.UserManagerImpl.getAuthorizable(UserManagerImpl.java:821)
at
org.apache.jackrabbit.core.security.user.UserManagerImpl.internalGetAuthorizable(UserManagerImpl.java:908)
at
org.apache.jackrabbit.core.security.user.UserManagerImpl.getAuthorizable(UserManagerImpl.java:478)
at
org.apache.jackrabbit.core.security.principal.DefaultPrincipalProvider.providePrincipal(DefaultPrincipalProvider.java:124)
at
org.apache.jackrabbit.core.security.principal.AbstractPrincipalProvider.getPrincipal(AbstractPrincipalProvider.java:112)
- locked
org.apache.jackrabbit.core.security.principal.DefaultPrincipalProvider@e4359f
at
org.apache.jackrabbit.core.security.simple.SimpleLoginModule.getPrincipal(SimpleLoginModule.java:95)
at
org.apache.jackrabbit.core.security.authentication.AbstractLoginModule.login(AbstractLoginModule.java:319)
at
org.apache.jackrabbit.core.security.authentication.LocalAuthContext.login(LocalAuthContext.java:86)
at
org.apache.jackrabbit.core.RepositoryImpl.login(RepositoryImpl.java:1465)
at
org.apache.jackrabbit.commons.AbstractRepository.login(AbstractRepository.java:135)
at
org.apache.jackrabbit.server.SessionProviderImpl.getSession(SessionProviderImpl.java:86)
at
org.apache.jackrabbit.server.jcr.JCRWebdavServer$SessionCache.getRepositorySession(JCRWebdavServer.java:337)
at
org.apache.jackrabbit.server.jcr.JCRWebdavServer$SessionCache.get(JCRWebdavServer.java:232)
at
org.apache.jackrabbit.server.jcr.JCRWebdavServer$SessionCache.access$200(JCRWebdavServer.java:165)
at
org.apache.jackrabbit.server.jcr.JCRWebdavServer.attachSession(JCRWebdavServer.java:103)
at
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:275)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at
org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at
com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at
org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at
com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:239)
at
com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at
com.sun.grizzly.comet.CometEngine.executeServlet(CometEngine.java:481)
at com.sun.grizzly.comet.CometEngine.handle(CometEngine.java:342)
at
com.sun.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:84)
at
com.sun.grizzly.arp.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:161)
at
com.sun.grizzly.arp.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:137)
at
com.sun.grizzly.arp.AsyncProcessorTask.doTask(AsyncProcessorTask.java:88)
at com.sun.grizzly.http.TaskBase.run(TaskBase.java:189)
at
com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at
com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:619)
Locked ownable synchronizers:
- locked java.util.concurrent.locks.ReentrantLock$NonfairSync@1c4c77a
{noformat}
This happens mostly just after deployment of the jackrabbit repo. Once a single
call is successfully made the system keeps working.
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