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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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Glen Geng updated HDDS-4560:
----------------------------
    Description: 
Add ReadWriteLock into PipelineStateMap to protect contention between 
RaftServer and PipelineManager.

If current leader SCM (as leader of term N) step-down while there are on-going 
transactions, there might be read-write contention that new leader (as leader 
of term N+1) replicate some method(addPipeline/removePipeline) to underlying 
raft log which will be executed by StateMachineUpdater, and at the same time 
PipelineManager is doing some getPipeline operations.

  was:
Add ReadWriteLock into PipelineStateMap to protect contention between 
RaftServer and PipelineManager.

If current SCM (as leader of term N) step-down while there is some on-going 
transaction, there might be read-write contention that new leader (as leader of 
term N+1) replicate some method(addPipeline/removePipeline) to underlying raft 
log which will be executed by StateMachineUpdater, and at the same time 
PipelineManager is doing some getPipeline operations.


> Add ReadWriteLock into PipelineStateMap to protect contention 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
>
> Add ReadWriteLock into PipelineStateMap to protect contention between 
> RaftServer and PipelineManager.
> If current leader SCM (as leader of term N) step-down while there are 
> on-going transactions, there might be read-write contention that new leader 
> (as leader of term N+1) replicate some method(addPipeline/removePipeline) to 
> underlying raft log which will be executed by StateMachineUpdater, and at the 
> same time PipelineManager is doing some getPipeline operations.



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