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https://issues.apache.org/jira/browse/HDDS-1517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16841586#comment-16841586
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Jitendra Nath Pandey edited comment on HDDS-1517 at 5/16/19 5:56 PM:
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The patch moves addition of container to pipelineStateMap after its addition to
container cache. Now a thread may first find the container in the cache but not
in pipelineStateMap. How is the race condition addressed? Do we guarantee that
a thread will always look in a certain order.
was (Author: jnp):
The patch moves addition of container to pipelineStateMap after its addition to
container cache. Now a thread may first find the container in the cache but not
in pipelineStateMap. How is the race condition addressed? Do we guarantee that
a thread will never look in pipelineStateMap before it looks in container cache?
> AllocateBlock call fails with ContainerNotFoundException
> --------------------------------------------------------
>
> Key: HDDS-1517
> URL: https://issues.apache.org/jira/browse/HDDS-1517
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: SCM
> Affects Versions: 0.5.0
> Reporter: Shashikant Banerjee
> Assignee: Shashikant Banerjee
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.4.1
>
> Attachments: HDDS-1517.000.patch
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> In allocateContainer call, the container is first added to pipelineStateMap
> and then added to container cache. If two allocate blocks execute
> concurrently, it might happen that one find the container to exist in the
> pipelineStateMap but the container is yet to be updated in the container
> cache, hence failing with CONTAINER_NOT_FOUND exception.
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