Bug 1366939

Summary: [GSS] (6.4.z) SharedLocalYieldingClusterLockManager pauses with multiple remote lockers
Product: [JBoss] JBoss Enterprise Application Platform 6 Reporter: dereed
Component: ClusteringAssignee: Radoslav Husar <rhusar>
Status: CLOSED CURRENTRELEASE QA Contact: Michal Vinkler <mvinkler>
Severity: unspecified Docs Contact:
Priority: high    
Version: 6.4.6CC: bmaxwell, jbilek, jtruhlar, msochure, paul.ferraro, ppalaga, rhusar
Target Milestone: CR1   
Target Release: EAP 6.4.11   
Hardware: Unspecified   
OS: Unspecified   
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Last Closed: 2017-01-17 13:07:38 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 1361648, 1368280, 1370648    
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Description Flags
bz1366939-test.patch none

Description dereed 2016-08-15 05:11:00 UTC 
When more than one remote locker is waiting on a local lock,
only the first is notified when the lock is released.  The
rest wait their full timeout before (successfully) returning.
Comment 1 dereed 2016-08-15 05:13:28 UTC 
Created attachment 1190788 [details]
bz1366939-test.patch

Test case that demonstrates issue.
Comment 2 dereed 2016-08-15 05:24:03 UTC 
The main issue is that unlock only wakes up one waiter:

    LockSupport.unpark(waiters.peek());

But LocalLock.lockForRemoteNode/ClusterHandler.lockFromCluster also only let one waiter at a time take the lock (which is then removed).
Comment 6 Jiří Bílek 2016-10-05 08:57:27 UTC 
Verified with EAP 6.4.11.CP.CR1
Comment 7 Petr Penicka 2017-01-17 13:07:38 UTC 
Retroactively bulk-closing issues from released EAP 6.4 cummulative patches.