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https://issues.apache.org/jira/browse/HDFS-17527?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simbarashe Dzinamarira reassigned HDFS-17527:
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Assignee: (was: Simbarashe Dzinamarira)
> RBF: Routers should not allow observer reads when namenode stateId context is
> disabled
> --------------------------------------------------------------------------------------
>
> Key: HDFS-17527
> URL: https://issues.apache.org/jira/browse/HDFS-17527
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Simbarashe Dzinamarira
> Priority: Major
>
> HDFS-17514 address the case when state ID context is first enabled and then
> disabled. However, if state Id is never enabled at all, there should be on
> observer reads.
> Tests in TestNoNamenodesAvailableLongTime do not enable the namenode state Id
> context but there are still observer reads.
> The solution to this is to not advance the shareGlobalStateID in
> PoolAlignmentContext when the namenode returns a values of zero in the
> RpcHeader. Zero indicated that stateIdContext is disabled and should not be
> treated as a valid state ID value. Note, fixing this will require fixing the
> unit tests as well.
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