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https://issues.apache.org/jira/browse/ATLAS-1720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Madhan Neethiraj resolved ATLAS-1720.
-------------------------------------
Resolution: Abandoned
Atlas doesn't use Titan any more.
> Add titan storage.lock.wait-time for Berkley DB to fix intermittent IT
> failures
> --------------------------------------------------------------------------------
>
> Key: ATLAS-1720
> URL: https://issues.apache.org/jira/browse/ATLAS-1720
> Project: Atlas
> Issue Type: Bug
> Components: atlas-core
> Affects Versions: 1.0.0, trunk
> Reporter: Sarath Subramanian
> Assignee: Sarath Subramanian
> Priority: Major
>
> Some of the ITs in Atlas fail intermittently with exception - "Could not
> execute operation due to backend exception"
> Upon investigation it's found this is due to Berkley LockTimeoutException
> (https://github.com/thinkaurelius/titan/issues/1113)
> The default LockTimeout for berkley db is 500 ms and if a thread (some IT) is
> waiting on titan storage resource which is locked by another thread and it
> doesn't releases the lock within 500ms - fails with above exception. (see
> error log below)
> The fix for this is to increase the storage.lock.wait-time for berkley dbor
> increase the lock retry property - atlas.graph.storage.lock.retries=10.
> {code}
> Caused by: com.sleepycat.je.LockTimeoutException: (JE 5.0.73) Lock expired.
> Locker 1516581475 7535_NotificationHookConsumer thread-0_Txn: waited for lock
> on database=edgestore LockAddr:284896285 LSN=0x0/0x21d55f type=WRITE
> grant=WAIT_PROMOTION timeoutMillis=500 startTime=1491261268442
> endTime=1491261268942
> Owners: [<LockInfo locker="1445928922 7537_qtp184901207-1038 -
> e015a355-d6c5-4424-b7a7-833a289aea9d_Txn" type="READ"/>, <LockInfo
> locker="1516581475 7535_NotificationHookConsumer thread-0_Txn" type="READ"/>]
> Waiters: []
> Transaction 1445928922 7537_qtp184901207-1038 -
> e015a355-d6c5-4424-b7a7-833a289aea9d_Txn waits for LockAddr:471572402
> Owners:<LockInfo locker="1516581475 7535_NotificationHookConsumer
> thread-0_Txn" type="WRITE"/> Waiters:[<LockInfo locker="1445928922
> 7537_qtp184901207-1038 - e015a355-d6c5-4424-b7a7-833a289aea9d_Txn"
> type="READ"/>]
> Transaction 1516581475 7535_NotificationHookConsumer thread-0_Txn owns
> LockAddr:471572402 <LockInfo locker="1516581475 7535_NotificationHookConsumer
> thread-0_Txn" type="WRITE"/>
> Transaction 1516581475 7535_NotificationHookConsumer thread-0_Txn waits for
> LockAddr:284896285
> {code}
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