[jira] [Commented] (ACCUMULO-4428) GC does not delete WAL files belonging to dead tservers

["Josh Elser (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ACCUMULO-4428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15446198#comment-15446198 ] 

Josh Elser commented on ACCUMULO-4428:
--------------------------------------

FYI [~mjwall], this sounds like the changes you introduced in ACCUMULO-4157.

[~adamjshook], thanks for filing this! Are we to assume that you have also seen this happening in a real cluster? I'm looking back at the changes now to refresh myself.

> 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
>             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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)