[jira] [Commented] (SOLR-11458) Bugs in MoveReplicaCmd handling of failures

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-11458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16251193#comment-16251193 ] 

ASF subversion and git services commented on SOLR-11458:
--------------------------------------------------------

Commit 7c54b2b116d6ee0012c598373fed1b93af74caf6 in lucene-solr's branch refs/heads/master from [~ab]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=7c54b2b ]

SOLR-11458: Improve this test to show the failure to be fixed in SOLR-11458.


> Bugs in MoveReplicaCmd handling of failures
> -------------------------------------------
>
>                 Key: SOLR-11458
>                 URL: https://issues.apache.org/jira/browse/SOLR-11458
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 7.0, 7.0.1, 7.1, master (8.0)
>            Reporter: Andrzej Bialecki 
>            Assignee: Andrzej Bialecki 
>
> Spin-off from SOLR-11449:
> {quote}
> There's a section of code in moveNormalReplica that ensures that we don't lose a shard leader during move. There's no corresponding protection in moveHdfsReplica, which means that moving a replica that is also a shard leader may potentially lead to data loss (eg. when replicationFactor=1).
> Also, there's no rollback strategy when moveHdfsReplica partially fails, unlike in moveNormalReplica where the code simply skips deleting the original replica - it seems that the code should attempt to restore the original replica in this case? When RF=1 and such failure occurs then not restoring the original replica means lost shard.
> {quote}



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