[jboss-jira] [JBoss JIRA] (JGRP-2423) NPE during unlock operation
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https://issues.redhat.com/browse/JGRP-2423?page=com.atlassian.jira.plugin...
]
Bela Ban commented on JGRP-2423:
--------------------------------
It would help to know which fields are null. If you can reproduce this, could you wrap the
compareTo() call in a try-catch and print out the 2 owners, plus {{address}}... Perhaps
this points to a different issue, because a field is expected to be non-null, but is
null.
Meanwhile, I'm going to harden this by taking null fields into account...
NPE during unlock operation
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Key: JGRP-2423
URL: https://issues.redhat.com/browse/JGRP-2423
Project: JGroups
Issue Type: Bug
Affects Versions: 4.1.8
Reporter: Max Shaposhnyk
Assignee: Bela Ban
Priority: Major
Fix For: 4.1.9
The following NPE's are appearing in the che.openshift.io production server logs
causing the multiple threads to blocking and break down some fuctionality.
ATM we're unable to clearly reproduce issue on local installations (it happens very
rarely on local, but quite frequently on prod server)
{noformat}
java.lang.NullPointerException: null
at org.jgroups.util.Owner.compareTo(Owner.java:59)
at org.jgroups.protocols.Locking$ClientLock.compareTo(Locking.java:1142)
at org.jgroups.protocols.Locking$ClientLock.compareTo(Locking.java:942)
at java.util.concurrent.ConcurrentSkipListMap.cpr(ConcurrentSkipListMap.java:655)
at java.util.concurrent.ConcurrentSkipListMap.doPut(ConcurrentSkipListMap.java:835)
at
java.util.concurrent.ConcurrentSkipListMap.putIfAbsent(ConcurrentSkipListMap.java:1979)
at java.util.concurrent.ConcurrentSkipListSet.add(ConcurrentSkipListSet.java:241)
at
org.jgroups.protocols.Locking$ClientLockTable.addToPendingReleaseRequests(Locking.java:1323)
at org.jgroups.protocols.Locking$ClientLock._unlock(Locking.java:1070)
at org.jgroups.protocols.Locking$ClientLock.unlock(Locking.java:996)
at org.jgroups.protocols.Locking.down(Locking.java:176)
at org.jgroups.stack.ProtocolStack.down(ProtocolStack.java:928)
at org.jgroups.JChannel.down(JChannel.java:627)
at org.jgroups.blocks.locking.LockService$LockImpl.unlock(LockService.java:167)
at
org.eclipse.che.multiuser.api.distributed.lock.JGroupsWorkspaceLockService$UnlockerImpl.unlock(JGroupsWorkspaceLockService.java:73)
at org.eclipse.che.commons.lang.concurrent.Unlocker.close(Unlocker.java:38)
at
org.eclipse.che.api.workspace.server.WorkspaceRuntimes.$closeResource(WorkspaceRuntimes.java:314)
{noformat}
additional links:
[1] https://github.com/eclipse/che/issues/15231
[2] https://issues.redhat.com/browse/JGRP-2299
[3] https://issues.redhat.com/browse/JGRP-2364
[4]
https://github.com/eclipse/che/blob/master/assembly/assembly-wsmaster-war...
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