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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-14317) Stuck FSHLog: bad disk (HDFS-8960) and can't roll WAL
Date Mon, 31 Aug 2015 21:51:47 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Elliott Clark updated HBASE-14317:
----------------------------------
    Attachment: HBASE-14317-v2.patch

This patch is a little more thorough about the sync futures. We need to make sure that all
of the syncfutures are marked as failed. Other wise it's possible that others could sneak
in.

> 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.patch,
[Java] RS stuck on WAL sync to a dead DN - Pastebin.com.html, append-only-test.patch, raw.php,
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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