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Posted to dev@oozie.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2018/05/31 10:31:00 UTC
[jira] [Commented] (OOZIE-3260) [sla] Remove stale item above max
retries on JPA related errors from in-memory SLA map
[ https://issues.apache.org/jira/browse/OOZIE-3260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16496361#comment-16496361 ]
Hadoop QA commented on OOZIE-3260:
----------------------------------
PreCommit-OOZIE-Build started
> [sla] Remove stale item above max retries on JPA related errors from in-memory SLA map
> --------------------------------------------------------------------------------------
>
> Key: OOZIE-3260
> URL: https://issues.apache.org/jira/browse/OOZIE-3260
> Project: Oozie
> Issue Type: Bug
> Components: coordinator, core, workflow
> Affects Versions: 5.0.0
> Reporter: Andras Piros
> Assignee: Andras Piros
> Priority: Major
> Attachments: OOZIE-3260.001.patch
>
>
> Despite having implemented OOZIE-3134, there are still cases where {{SLACalculatorMemory#slaMap}} and database contents still get out of sync. Some possibilities including but not limited to:
> * database contents of {{SLA_SUMMARY}} table have been purged manually from DB
> * no corresponding {{WF_JOBS}} or {{COORD_JOBS}} entries exist anymore in DB
> * the {{WF_JOBS}} or {{COORD_JOBS}} instance that is being tracked by the {{SLACalcStatus}} instances inside {{SLACalculatorMemory#slaMap}} is not yet persisted to database when the SLA entry is already processed by {{SLACalculatorMemory.HistoryPurgeWorker}}. Depending on e.g. how many coordinator actions are being materialized, it can very well happen that {{SLACalcStatus}} entries inserted to the in-memory map will be processed before their corresponding {{CoordActionBean}} entries are yet to be persisted to database
> In those rare cases, we see {{JPAExecutorException}} instances like:
> {noformat}
> 2017-10-09 17:00:18,185 DEBUG openjpa.jdbc.SQL: SERVER[HOST] <t 1527981517, conn 1584126245> [0 ms] spent
> 2017-10-09 17:00:18,185 ERROR org.apache.oozie.sla.SLACalculatorMemory: SERVER[tplhc01c001.iuser.iroot.adidom.com] USER[-] GROUP[-] TOKEN[-] APP[-] JOB[0000438-170916014916144-oozie-oozi-C@556] ACTION[-] Exception in SLA processing for job [0000438-170916014916144-oozie-oozi-C@556]
> org.apache.oozie.executor.jpa.JPAExecutorException: E0604: Job does not exist [select w.eventProcessed from SLASummaryBean w where w.jobId = :id]
> at org.apache.oozie.executor.jpa.SLASummaryQueryExecutor.getSingleValue(SLASummaryQueryExecutor.java:161)
> at org.apache.oozie.sla.SLACalculatorMemory.updateJobSla(SLACalculatorMemory.java:480)
> at org.apache.oozie.sla.SLACalculatorMemory.updateAllSlaStatus(SLACalculatorMemory.java:601)
> {noformat}
> Solution here is to track the number of times the {{SLACalcStatus}} entry has not been processed successfully, and when a preconfigured {{oozie.sla.service.SLAService.maximum.retry.count}} is reached, remove any {{SLACalculatorMemory#slaMap}} entries that are causing those {{JPAExecutorException}} instances, to not cause huge logfiles. The items to be logged don't exist, anyways.
> It's still possible that multiple {{CoordActionBean}} instances being inserted won't have {{SLACalcStatus}} entries inside {{SLACalculatorMemory#slaMap}} by the time written to database, and thus, no SLA will be tracked. In those rare cases, preconfigured maximum retry count can be extended.
> Note that current implementation of [*{{SLACalculatorMemory#updateJobSla()}}*|https://github.com/apache/oozie/blob/master/core/src/main/java/org/apache/oozie/sla/SLACalculatorMemory.java#L238-L242] already removes the stale {{SLACalcStatus}} entry. The new functionality here is to introduce {{SLACalcStatus#retryCount}}, and extend the {{JPAExecutorException}} {{ErrorCode}}s of interest.
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