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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14317) Stuck FSHLog: bad disk (HDFS-8960) and can't roll WAL
Date Tue, 01 Sep 2015 06:40:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14724870#comment-14724870
] 

stack commented on HBASE-14317:
-------------------------------

Patch is for 1.2. Will make a patch for master when have fix.

[~eclark] I took a look at your patch. I get now what you mean by a sync-after-a-failed-append
should always fail. Agree. Lets fix that too. I think we should be able to have more finesse
than what is here where we stamp out everything -- smile. I think a sync could come in even
after all we've made all our noise stamping on everything (let me do the server mocks they
way you have them in the patch too... and integrate your test).

> Stuck FSHLog: bad disk (HDFS-8960) and can't roll WAL
> -----------------------------------------------------
>
>                 Key: HBASE-14317
>                 URL: https://issues.apache.org/jira/browse/HBASE-14317
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.2.0, 1.1.1
>            Reporter: stack
>            Priority: Critical
>         Attachments: 14317.test.txt, HBASE-14317-v1.patch, HBASE-14317-v2.patch, HBASE-14317-v3.patch,
HBASE-14317-v4.patch, HBASE-14317.patch, [Java] RS stuck on WAL sync to a dead DN - Pastebin.com.html,
append-only-test.patch, raw.php, repro.txt, san_dump.txt, subset.of.rs.log
>
>
> hbase-1.1.1 and hadoop-2.7.1
> We try to roll logs because can't append (See HDFS-8960) but we get stuck. See attached
thread dump and associated log. What is interesting is that syncers are waiting to take syncs
to run and at same time we want to flush so we are waiting on a safe point but there seems
to be nothing in our ring buffer; did we go to roll log and not add safe point sync to clear
out ringbuffer?
> Needs a bit of study. Try to reproduce.



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