[
https://issues.apache.org/jira/browse/HDFS-17527?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Simbarashe Dzinamarira reassigned HDFS-17527:
---------------------------------------------
Assignee: 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
> Assignee: Simbarashe Dzinamarira
> Priority: Major
>
> HDFS-17514 addressed the case when state ID context is first enabled and then
> disabled. However, if state Id is never enabled at all, there should be no
> 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
> RpcResponseHeader. Zero indicates that stateIdContext is disabled and should
> not be treated as a valid state ID value. Note, fixing this will require
> adjusting the unit tests as well.
> A further optimization related to HDFS-17514 is that when sharedGlobalStateId
> and poolLocalStateId have been reset, we also should not allow
> poolLocalStateId to be advanced by clients until the sharedGlobalStateId has
> been advanced. This will protect existing clients from using a stale ID.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
