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Posted to issues@storm.apache.org by "Govind Menon (JIRA)" <ji...@apache.org> on 2018/04/04 15:45:00 UTC

[jira] [Commented] (STORM-2171) blob recovery on a single host results in deadlock

    [ https://issues.apache.org/jira/browse/STORM-2171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16425741#comment-16425741 ] 

Govind Menon commented on STORM-2171:
-------------------------------------

Spoke to [~revans2]. 

 
 * Will be removing redundant ZK state updates when using LocalFsBlobStore
 * Will not connect to self when the only nimbus that has the replica is self

> blob recovery on a single host results in deadlock
> --------------------------------------------------
>
>                 Key: STORM-2171
>                 URL: https://issues.apache.org/jira/browse/STORM-2171
>             Project: Apache Storm
>          Issue Type: Bug
>          Components: storm-core
>    Affects Versions: 2.0.0
>            Reporter: Robert Joseph Evans
>            Assignee: Govind Menon
>            Priority: Major
>
> It might be more versions but I have only tested this on 2.x.
> Essentially when trying to find replicas to copy blobs from LocalFSBlobStore does not exclude itself.  This results in a deadlock where it is holding a lock trying to download the blob, and at the same time has done a request back to itself trying to download the blob, but it will never finish because it is blocked on the same lock.



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