jackrabbit-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From shailesh mangal <shailesh.man...@getzephyr.com>
Subject Re: Concurrency issues after upgrading to 2.2 from 1.6
Date Fri, 21 Jan 2011 23:28:04 GMT
Sending it again to the group since I sent it around the holiday time.

Its hard to believe that we are the only ones running into concurrency issues 
and I dont think our usecase is any special. Any suggestion is highly 
appreciated. 

Use case:
Multiple threads trying to copy a few nodes under the same Parent Node using 
workspace.copy(). 
Each thread has its own transaction and own session. 
All threads end up hanging forever and any subsequent read or write operation 
end up waiting for a lock. 

I tried this with JR 2.2 and 2.2.1

-Shailesh



________________________________
From: shailesh mangal <shailesh.mangal@getzephyr.com>
To: users@jackrabbit.apache.org
Sent: Wed, December 29, 2010 12:44:07 AM
Subject: Concurrency issues after upgrading to 2.2 from 1.6

Hi All,

We recently upgraded to 2.2 from current 1.6.4 as we were facing some 
concurrency issues. But 2.2 seems to have same concurrency issues. 

Scenario:
We have three threads trying to copy same set of versionable nodes (about 300) 
using workspace.copy() under same parent node. Each thread has its own session. 
All threads hang indefinitely, however JVM doesnt report deadlock, it looks like 

all three threads are waiting. Here is the thread dump for all three threads:
This appears to be similar to https://issues.apache.org/jira/browse/JCR-2828 
which is marked as fixed. Any suggestions would be highly appreciable.

"http-80-Processor25" daemon prio=6 tid=0x4ec97400 nid=0xe88 in Object.wait() 
[0x51ffd000]    java.lang.Thread.State: WAITING (on object monitor)     at 
java.lang.Object.wait(Native Method)     at 
java.lang.Object.wait(Object.java:485) 

    at 
org.apache.jackrabbit.core.state.DefaultISMLocking.acquireWriteLock(DefaultISMLocking.java:124)

    - locked <0x1bc95bc8> (a org.apache.jackrabbit.core.state.DefaultISMLocking) 

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.acquireWriteLock(InternalVersionManagerBase.java:182)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.startWriteOperation(InternalVersionManagerBase.java:286)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.internalCreateVersionHistory(InternalVersionManagerBase.java:411)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerImpl$1.run(InternalVersionManagerImpl.java:254)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerImpl$DynamicESCFactory.doSourced(InternalVersionManagerImpl.java:709)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerImpl.createVersionHistory(InternalVersionManagerImpl.java:251)

    at 
org.apache.jackrabbit.core.version.InternalXAVersionManager.createVersionHistory(InternalXAVersionManager.java:176)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.getVersionHistory(InternalVersionManagerBase.java:326)

    at 
org.apache.jackrabbit.core.version.InternalXAVersionManager.getVersionHistory(InternalXAVersionManager.java:58)

    at 
org.apache.jackrabbit.core.BatchedItemOperations.copyNodeState(BatchedItemOperations.java:1758)

    at 
org.apache.jackrabbit.core.BatchedItemOperations.copy(BatchedItemOperations.java:422)

    at 
org.apache.jackrabbit.core.WorkspaceImpl.internalCopy(WorkspaceImpl.java:420) 
    at org.apache.jackrabbit.core.WorkspaceImpl.copy(WorkspaceImpl.java:646)
    
"http-80-Processor21" daemon prio=6 tid=0x4ec95c00 nid=0x1b18 in Object.wait() 
[0x51dbd000]    java.lang.Thread.State: WAITING (on object monitor)     at 
java.lang.Object.wait(Native Method)     at 
java.lang.Object.wait(Object.java:485) 

    at 
org.apache.jackrabbit.core.state.DefaultISMLocking.acquireWriteLock(DefaultISMLocking.java:124)

    - locked <0x1bc95bc8> (a org.apache.jackrabbit.core.state.DefaultISMLocking) 

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.acquireWriteLock(InternalVersionManagerBase.java:182)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.startWriteOperation(InternalVersionManagerBase.java:286)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.checkin(InternalVersionManagerBase.java:571)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerImpl$4.run(InternalVersionManagerImpl.java:410)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerImpl$DynamicESCFactory.doSourced(InternalVersionManagerImpl.java:709)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerImpl.checkin(InternalVersionManagerImpl.java:406)

    at 
org.apache.jackrabbit.core.version.InternalXAVersionManager.checkin(InternalXAVersionManager.java:238)

    at 
org.apache.jackrabbit.core.version.VersionManagerImplBase.checkoutCheckin(VersionManagerImplBase.java:190)

    at 
org.apache.jackrabbit.core.VersionManagerImpl.access$100(VersionManagerImpl.java:72)

    at 
org.apache.jackrabbit.core.VersionManagerImpl$1.perform(VersionManagerImpl.java:121)

    at 
org.apache.jackrabbit.core.VersionManagerImpl$1.perform(VersionManagerImpl.java:114)

    at 
org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:200) 
    at 
org.apache.jackrabbit.core.VersionManagerImpl.perform(VersionManagerImpl.java:95)

    at 
org.apache.jackrabbit.core.VersionManagerImpl.checkin(VersionManagerImpl.java:114)

    at 
org.apache.jackrabbit.core.VersionManagerImpl.checkin(VersionManagerImpl.java:100)

    at org.apache.jackrabbit.core.NodeImpl.checkin(NodeImpl.java:2844)     at 
com.thed.repository.RepositoryNodeHelper.setTestCaseProperties(RepositoryNodeHelper.java:250)



"http-80-Processor24" daemon prio=6 tid=0x4ec97000 nid=0x1b2c in Object.wait() 
[0x51f6d000]    java.lang.Thread.State: WAITING (on object monitor)     at 
java.lang.Object.wait(Native Method)     at 
java.lang.Object.wait(Object.java:485) 

    at 
org.apache.jackrabbit.core.state.DefaultISMLocking.acquireReadLock(DefaultISMLocking.java:92)

    - locked <0x1bc95bc8> (a org.apache.jackrabbit.core.state.DefaultISMLocking) 

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.acquireReadLock(InternalVersionManagerBase.java:196)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerImpl.getItem(InternalVersionManagerImpl.java:324)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.createInternalVersionItem(InternalVersionManagerBase.java:797)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerImpl.getItem(InternalVersionManagerImpl.java:329)

    - locked <0x1bc95c38> (a org.apache.commons.collections.map.ReferenceMap) 
    at 

org.apache.jackrabbit.core.version.InternalXAVersionManager.getItem(InternalXAVersionManager.java:429)

    at 
org.apache.jackrabbit.core.version.InternalVersionManagerBase.getVersion(InternalVersionManagerBase.java:94)

    at 
org.apache.jackrabbit.core.version.InternalXAVersionManager.getVersion(InternalXAVersionManager.java:58)

    at 
org.apache.jackrabbit.core.version.VersionManagerImplBase.getBaseVersion(VersionManagerImplBase.java:388)

    at 
org.apache.jackrabbit.core.VersionManagerImpl.access$900(VersionManagerImpl.java:72)

    at 
org.apache.jackrabbit.core.VersionManagerImpl$5.perform(VersionManagerImpl.java:201)

    at 
org.apache.jackrabbit.core.VersionManagerImpl$5.perform(VersionManagerImpl.java:197)

    at 
org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:200) 
    at 
org.apache.jackrabbit.core.VersionManagerImpl.perform(VersionManagerImpl.java:95)

    at 
org.apache.jackrabbit.core.VersionManagerImpl.getBaseVersion(VersionManagerImpl.java:197)

    at org.apache.jackrabbit.core.NodeImpl.getBaseVersion(NodeImpl.java:2948) 
    at 

com.thed.repository.TestcaseContentsManager.copyTestCases(TestcaseContentsManager.java:356)

  
Shailesh 
Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message