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https://issues.apache.org/jira/browse/TRAFODION-2011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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liu ming reassigned TRAFODION-2011:
-----------------------------------
Assignee: liu ming
> better logging or exception messaging for getScanner issue due to lease
> timeout
> -------------------------------------------------------------------------------
>
> Key: TRAFODION-2011
> URL: https://issues.apache.org/jira/browse/TRAFODION-2011
> Project: Apache Trafodion
> Issue Type: Improvement
> Reporter: liu ming
> Assignee: liu ming
>
> When an active transaction is too long, its lease will timeout. And the
> transaction will be retired internally, however, the client doesn't know and
> still issue new get/put operations, and will get strange exception, which is
> hard to understand.
> It will be better to enhance the error message or logging to help identify
> the issue.
> Reproduce:
> simulate a long transaction,
> >begin;
> wait for 2 hours, or change the hbase.transaction.lease.timeout to shorter
> timeout.
> >do an update;
> some error like this, it is confusing:
> *** ERROR[8448] Unable to access Hbase interface. Call to
> ExpHbaseInterface::nextRow returned error HBASE_ACCESS_ERROR(-706). Cause:
> java.util.concurrent.ExecutionException: java.io.IOException: PerformScan
> error on coprocessor call, scannerID: 1 java.io.IOException: performScan
> encountered Exception txID: 25769804282 Exception:
> org.apache.hadoop.hbase.UnknownScannerException: TrxRegionEndpoint getScanner
> - scanner id 1, already closed?
> java.util.concurrent.FutureTask.report(FutureTask.java:122)
> java.util.concurrent.FutureTask.get(FutureTask.java:188)
> org.trafodion.sql.HTableClient.fetchRows(HTableClient.java:1251)
>
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