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[eclipselink-users] locking problem? 
Hi,
It seems Eclipselink ( 2.3.2.v20111125-r10461) is locked somewhere. My app has been running for some time, and is now stuck. Here are relevant parts of my thread dump:
"http-thread-pool-8080(51)" daemon prio=10 tid=0x00007f8648105800 nid=0x4d1 waiting for monitor entry [0x00007f86a819e000] 
   java.lang.Thread.State: BLOCKED (on object monitor)
at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:143) - waiting to lock <0x00000005c8306308> (a org.eclipse.persistence.internal.indirection.QueryBasedValueHolder) at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:222) at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:88) - locked <0x000000076b4420f0> (a org.eclipse.persistence.internal.indirection.UnitOfWorkQueryValueHolder) at org.eclipse.persistence.indirection.IndirectList.buildDelegate(IndirectList.java:244) at org.eclipse.persistence.indirection.IndirectList.getDelegate(IndirectList.java:414) - locked <0x000000076b442130> (a org.eclipse.persistence.indirection.IndirectList) at org.eclipse.persistence.indirection.IndirectList.size(IndirectList.java:752) at be.lapinsoft.haleczander.web.control.LoginController.loadLoginInfo(LoginController.java:132) 
[..]
"http-thread-pool-8080(31)" daemon prio=10 tid=0x00007f864401f800 nid=0x4c46 in Object.wait() [0x00007f8629833000] 
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
- waiting on <0x00000005c780a8c8> (a org.eclipse.persistence.internal.helper.ConcurrencyManager) 
        at java.lang.Object.wait(Object.java:503)
at org.eclipse.persistence.internal.helper.ConcurrencyManager.acquireDeferredLock(ConcurrencyManager.java:198) - locked <0x00000005c780a8c8> (a org.eclipse.persistence.internal.helper.ConcurrencyManager) at org.eclipse.persistence.internal.identitymaps.CacheKey.acquireDeferredLock(CacheKey.java:177) at org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap.acquireDeferredLock(AbstractIdentityMap.java:98) at org.eclipse.persistence.internal.identitymaps.IdentityMapManager.acquireDeferredLock(IdentityMapManager.java:113) at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireDeferredLock(IdentityMapAccessor.java:74) at org.eclipse.persistence.internal.sessions.AbstractSession.retrieveCacheKey(AbstractSession.java:4664) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:772) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:715) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:668) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:601) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:560) at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:717) at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:769) at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:433) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1081) at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:844) at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1040) at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:392) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1128) at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2871) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1516) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1498) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1463) at org.eclipse.persistence.internal.jpa.EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:485) at org.eclipse.persistence.internal.jpa.EJBQueryImpl.getResultList(EJBQueryImpl.java:742) at be.lapinsoft.haleczander.service.MainService.findGroupes(MainService.java:460) 
[...]
"http-thread-pool-8080(28)" daemon prio=10 tid=0x00007f8650023800 nid=0x4b9b in Object.wait() [0x00007f862a11a000] 
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
- waiting on <0x00000005c780c168> (a org.eclipse.persistence.internal.helper.ConcurrencyManager) 
        at java.lang.Object.wait(Object.java:503)
at org.eclipse.persistence.internal.helper.ConcurrencyManager.acquire(ConcurrencyManager.java:94) - locked <0x00000005c780c168> (a org.eclipse.persistence.internal.helper.ConcurrencyManager) at org.eclipse.persistence.internal.identitymaps.CacheKey.acquire(CacheKey.java:126) at org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap.acquireLock(AbstractIdentityMap.java:122) at org.eclipse.persistence.internal.identitymaps.IdentityMapManager.acquireLock(IdentityMapManager.java:144) at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireLock(IdentityMapAccessor.java:92) at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireLock(IdentityMapAccessor.java:83) at org.eclipse.persistence.internal.sessions.AbstractSession.retrieveCacheKey(AbstractSession.java:4688) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:772) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:715) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:668) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:601) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:560) at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:717) at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:769) at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:433) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1081) at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:844) at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1040) at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:392) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1128) at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2871) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1516) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1498) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1463) at org.eclipse.persistence.internal.jpa.EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:485) at org.eclipse.persistence.internal.jpa.EJBQueryImpl.getResultList(EJBQueryImpl.java:742) at be.lapinsoft.haleczander.service.PlaineService.getAllPlaines(PlaineService.java:54) 
[..]
"http-thread-pool-8080(24)" daemon prio=10 tid=0x00007f864401e800 nid=0x47c2 in Object.wait() [0x00007f86a1505000] 
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
- waiting on <0x00000005c780a8c8> (a org.eclipse.persistence.internal.helper.ConcurrencyManager) 
        at java.lang.Object.wait(Object.java:503)
at org.eclipse.persistence.internal.helper.ConcurrencyManager.acquireDeferredLock(ConcurrencyManager.java:198) - locked <0x00000005c780a8c8> (a org.eclipse.persistence.internal.helper.ConcurrencyManager) at org.eclipse.persistence.internal.identitymaps.CacheKey.acquireDeferredLock(CacheKey.java:177) at org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap.acquireDeferredLock(AbstractIdentityMap.java:98) at org.eclipse.persistence.internal.identitymaps.IdentityMapManager.acquireDeferredLock(IdentityMapManager.java:113) at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireDeferredLock(IdentityMapAccessor.java:74) at org.eclipse.persistence.internal.sessions.AbstractSession.retrieveCacheKey(AbstractSession.java:4664) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:772) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:715) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:668) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:601) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:560) at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:717) at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:769) at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:433) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1081) at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:844) at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1040) at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:392) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1128) at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2871) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1516) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1498) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1463) at org.eclipse.persistence.internal.jpa.EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:485) at org.eclipse.persistence.internal.jpa.EJBQueryImpl.getResultList(EJBQueryImpl.java:742) at be.lapinsoft.haleczander.service.MainService.findGroupes(MainService.java:460) 
[...]
"http-thread-pool-8080(23)" daemon prio=10 tid=0x00007f8648100000 nid=0x3e06 in Object.wait() [0x00007f862b8f3000] 
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
- waiting on <0x00000005c780a8c8> (a org.eclipse.persistence.internal.helper.ConcurrencyManager) 
        at java.lang.Object.wait(Object.java:503)
at org.eclipse.persistence.internal.helper.ConcurrencyManager.acquireDeferredLock(ConcurrencyManager.java:198) - locked <0x00000005c780a8c8> (a org.eclipse.persistence.internal.helper.ConcurrencyManager) at org.eclipse.persistence.internal.identitymaps.CacheKey.acquireDeferredLock(CacheKey.java:177) at org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap.acquireDeferredLock(AbstractIdentityMap.java:98) at org.eclipse.persistence.internal.identitymaps.IdentityMapManager.acquireDeferredLock(IdentityMapManager.java:113) at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireDeferredLock(IdentityMapAccessor.java:74) at org.eclipse.persistence.internal.sessions.AbstractSession.retrieveCacheKey(AbstractSession.java:4664) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:772) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:715) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:668) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:601) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:560) at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:717) at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:769) at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:433) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1081) at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:844) at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1040) at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:392) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1128) at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2871) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1516) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1498) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1463) at org.eclipse.persistence.internal.jpa.EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:485) at org.eclipse.persistence.internal.jpa.EJBQueryImpl.getResultList(EJBQueryImpl.java:742) at be.lapinsoft.haleczander.service.MainService.findGroupes(MainService.java:460) 
[..]
"http-thread-pool-8080(6)" daemon prio=10 tid=0x00007f865000e800 nid=0x2cd8 waiting for monitor entry [0x00007f86a1908000] 
   java.lang.Thread.State: BLOCKED (on object monitor)
at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:143) - waiting to lock <0x00000005c8306308> (a org.eclipse.persistence.internal.indirection.QueryBasedValueHolder) at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:222) at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:88) - locked <0x00000005c8372750> (a org.eclipse.persistence.internal.indirection.UnitOfWorkQueryValueHolder) at org.eclipse.persistence.indirection.IndirectList.buildDelegate(IndirectList.java:244) at org.eclipse.persistence.indirection.IndirectList.getDelegate(IndirectList.java:414) - locked <0x00000005c8372790> (a org.eclipse.persistence.indirection.IndirectList) at org.eclipse.persistence.indirection.IndirectList.size(IndirectList.java:752) at be.lapinsoft.haleczander.web.control.LoginController.loadLoginInfo(LoginController.java:132) 

Can someone help on this?

Thank you

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