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https://issues.apache.org/jira/browse/ACCUMULO-1962?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Elser updated ACCUMULO-1962:
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Fix Version/s: (was: 1.7.0)
1.8.0
> Improve batch scanner throughput in failure case
> ------------------------------------------------
>
> Key: ACCUMULO-1962
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1962
> Project: Accumulo
> Issue Type: Improvement
> Reporter: Keith Turner
> Fix For: 1.8.0
>
>
> The batch scanner currently does the following.
> # bin ranges to tablets servers and tabelts
> # if any ranges could not be binned (e.g. a tablet had no location) goto 1
> # queue up work for tablet servers on a thread pool
> # wait for thread pool to complete all work
> # if there were any failures goto 1
> In the face of failures (tablets not assigned because of migration, tablet
> servers dying) it would be better if the batch scanner worked on what it
> could and immediately requeued failures for processing immediately. The
> ConditionalWriter and BatchWriter have failure queues and increase the retry
> time if something keeps failing.
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