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From "Michael Wall (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-4428) GC does not delete WAL files belonging to dead tservers
Date Mon, 29 Aug 2016 15:45:20 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-4428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15446221#comment-15446221
] 

Michael Wall commented on ACCUMULO-4428:
----------------------------------------

[~adamjshook] when you say "each run of the SimpleGarbageCollector", do you mean stops and
restarts of the GC process?  I thought I tested it starting and stopping the GC process and
it and it added the dead tserver again.

> GC does not delete WAL files belonging to dead tservers
> -------------------------------------------------------
>
>                 Key: ACCUMULO-4428
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4428
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.7.2
>            Reporter: Adam J Shook
>            Priority: Blocker
>             Fix For: 1.7.3, 1.8.1
>
>
> The GarbageCollectWriteAheadLogs uses a Map<HostAndPort,Long> to track when it
had first seen a dead tserver, waiting an hour before deleting the files.  However, a new
instance of this class is re-created during each run of the SimpleGarbageCollector, causing
the state of the dead tservers to be lost.  All of the WAL files belonging to a dead tserver
will never be removed.



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