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https://issues.apache.org/jira/browse/HDDS-399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16617386#comment-16617386
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Nanda kumar commented on HDDS-399:
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Thanks [~msingh] for updating the patch and for the explanation on mini cluster
SCM restart changes, it makes sense.
In {{PipelineSelector}} as part of {{getReplicationPipeline}} call, we create a
new pipeline whenever possible. We make
{{manager.createPipeline(replicationFactor, replicationType)}} call to create
the pipeline, which also adds the pipeline to
{{PipelineManager#ActivePipeline}} list. At this point in time, the pipeline is
in ALLOCATED state. We should move the pipeline to active allocation path only
when the container is created and moved to OPEN state.
With existing code, if the pipeline initialization/updating its state fails, we
are not removing the container from the active list. This will cause an issue
if that particular pipeline is picked up for container allocation.
> Handle pipeline discovery on SCM restart.
> -----------------------------------------
>
> Key: HDDS-399
> URL: https://issues.apache.org/jira/browse/HDDS-399
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: SCM
> Affects Versions: 0.2.1
> Reporter: Mukul Kumar Singh
> Assignee: Mukul Kumar Singh
> Priority: Blocker
> Fix For: 0.2.1
>
> Attachments: HDDS-399.001.patch, HDDS-399.002.patch,
> HDDS-399.003.patch, HDDS-399.004.patch, HDDS-399.005.patch,
> HDDS-399.006.patch, HDDS-399.007.patch, HDDS-399.008.patch, HDDS-399.009.patch
>
>
> On SCM restart, as part on node registration, SCM should find out the list on
> open pipeline on the node. Once all the nodes of the pipeline have reported
> back, they should be added as active pipelines for further allocations.
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