Java stack information for the threads listed above:
===================================================
"2133459552@qtp-854380519-229 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter":
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00002aab1d50dc98> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:877)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1197)
        at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:594)
        at net.sf.ehcache.store.compound.CompoundStore$ReadWriteLockSync.lock(CompoundStore.java:737)
        at net.sf.ehcache.constructs.blocking.BlockingCache.acquiredLockForKey(BlockingCache.java:473)
        at net.sf.ehcache.constructs.blocking.BlockingCache.get(BlockingCache.java:442)
        at net.sf.ehcache.constructs.blocking.BlockingCache.get(BlockingCache.java:590)
        at net.sf.ehcache.constructs.web.filter.CachingFilter.buildPageInfo(CachingFilter.java:211)
        at net.sf.ehcache.constructs.web.filter.CachingFilter.doFilter(CachingFilter.java:185)
        at net.sf.ehcache.constructs.web.filter.Filter.doFilter(Filter.java:86)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
        at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
        at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
        at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)

Found one Java-level deadlock:
=============================
"2133459552@qtp-854380519-229 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter":
  waiting for ownable synchronizer 0x00002aab1d50dc98, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
  which is held by "325314462@qtp-854380519-224 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter"
"325314462@qtp-854380519-224 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter":
  waiting for ownable synchronizer 0x00002aab1d50fe60, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
  which is held by "1202293060@qtp-854380519-201 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter"
"1202293060@qtp-854380519-201 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter":
  waiting for ownable synchronizer 0x00002aab1d50f128, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
  which is held by "1461890232@qtp-854380519-192 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter"
"1461890232@qtp-854380519-192 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter":
  waiting for ownable synchronizer 0x00002aab1d50fe60, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
  which is held by "1202293060@qtp-854380519-201 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter"


"1202293060@qtp-854380519-201 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter":
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00002aab1d50f128> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:877)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1197)
        at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:594)
        at net.sf.ehcache.store.compound.Segment.fault(Segment.java:644)
        at net.sf.ehcache.store.compound.CompoundStore.fault(CompoundStore.java:392)
        at net.sf.ehcache.store.compound.factories.CapacityLimitedInMemoryFactory.evict(CapacityLimitedInMemoryFactory.java:124)
        at net.sf.ehcache.store.compound.factories.CapacityLimitedInMemoryFactory.create(CapacityLimitedInMemoryFactory.java:100)
        at net.sf.ehcache.store.compound.factories.CapacityLimitedInMemoryFactory.create(CapacityLimitedInMemoryFactory.java:37)
        at net.sf.ehcache.store.compound.Segment.create(Segment.java:342)
        at net.sf.ehcache.store.compound.Segment.put(Segment.java:400)
        at net.sf.ehcache.store.compound.CompoundStore.put(CompoundStore.java:132)
        at net.sf.ehcache.Cache.putInternal(Cache.java:1247)
        at net.sf.ehcache.Cache.put(Cache.java:1186)
        at net.sf.ehcache.Cache.put(Cache.java:1158)
        at net.sf.ehcache.constructs.blocking.BlockingCache.put(BlockingCache.java:525)
        at net.sf.ehcache.constructs.web.filter.CachingFilter.buildPageInfo(CachingFilter.java:220)
        at net.sf.ehcache.constructs.web.filter.CachingFilter.doFilter(CachingFilter.java:185)
        at net.sf.ehcache.constructs.web.filter.Filter.doFilter(Filter.java:86)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
        at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
        at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
        at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)

"1461890232@qtp-854380519-192 been through com.ixonos.contentmanagement.alfresco.AttachmentFilter":
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00002aab1d50fe60> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:877)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1197)
        at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:594)
        at net.sf.ehcache.store.compound.Segment.fault(Segment.java:644)
        at net.sf.ehcache.store.compound.CompoundStore.fault(CompoundStore.java:392)
        at net.sf.ehcache.store.compound.factories.CapacityLimitedInMemoryFactory.evict(CapacityLimitedInMemoryFactory.java:124)
        at net.sf.ehcache.store.compound.factories.CapacityLimitedInMemoryFactory.create(CapacityLimitedInMemoryFactory.java:100)
        at net.sf.ehcache.store.compound.factories.CapacityLimitedInMemoryFactory.create(CapacityLimitedInMemoryFactory.java:37)
        at net.sf.ehcache.store.compound.Segment.create(Segment.java:342)
        at net.sf.ehcache.store.compound.Segment.put(Segment.java:400)
        at net.sf.ehcache.store.compound.CompoundStore.put(CompoundStore.java:132)
        at net.sf.ehcache.Cache.putInternal(Cache.java:1247)
        at net.sf.ehcache.Cache.put(Cache.java:1186)
        at net.sf.ehcache.Cache.put(Cache.java:1158)
        at net.sf.ehcache.constructs.blocking.BlockingCache.put(BlockingCache.java:525)
        at net.sf.ehcache.constructs.web.filter.CachingFilter.buildPageInfo(CachingFilter.java:220)
        at net.sf.ehcache.constructs.web.filter.CachingFilter.doFilter(CachingFilter.java:185)
        at net.sf.ehcache.constructs.web.filter.Filter.doFilter(Filter.java:86)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
        at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
        at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
        at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)

Found 1 deadlock.