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https://issues.apache.org/jira/browse/HDDS-4560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nanda kumar resolved HDDS-4560.
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Resolution: Fixed
> Add ReadWriteLock into PipelineStateManagerV2Impl to protect contentions
> between RaftServer and PipelineManager
> ---------------------------------------------------------------------------------------------------------------
>
> Key: HDDS-4560
> URL: https://issues.apache.org/jira/browse/HDDS-4560
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Components: SCM HA
> Affects Versions: 1.1.0
> Reporter: Glen Geng
> Assignee: Glen Geng
> Priority: Major
> Labels: pull-request-available
>
> Add ReadWriteLock into PipelineStateManagerV2Impl to protect contentions
> between RaftServer and PipelineManager.
> If current leader SCM (as leader of term N) steps down while there are
> on-going transactions, there might be read/write contentions that new leader
> SCM (as leader of term N+1) has replicated some raft log entries
> encapsulating method addPipeline()/removePipeline()/updatePipelineState() to
> the underlying RaftServer that are being applied by StateMachineUpdater, and
> at the same time PipelineManager is calling getPipelines().
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