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From "Chris McCubbin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-2361) droptable crated infinite METADATA scan loop
Date Wed, 12 Feb 2014 21:00:20 GMT
Chris McCubbin created ACCUMULO-2361:
----------------------------------------

             Summary: droptable crated infinite METADATA scan loop
                 Key: ACCUMULO-2361
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2361
             Project: Accumulo
          Issue Type: Bug
    Affects Versions: 1.5.0
            Reporter: Chris McCubbin


Working with [~vines] on this one...

Setup: Created a couple tables, added some data, then dropped them. The drop hangs and !METADATA
(which has ~400 entries) is scanned in what looks like an infinite loop.

The table being dropped loks like this in !METADATA:

{code}
root@sqrrl> scan -b 3 -e 5 -t !METADATA
4;\x00\x00\x06f srv:dir []    /t-00000b6
4;\x00\x00\x06f srv:lock []    tservers/10.10.1.209:9997/zlock-0000000000$144274cd317000b
4;\x00\x00\x06f srv:time []    M0
4;\x00\x00\x06f ~tab:~pr []    \x00
4;\x00\x00\x0C\xCC loc:144274cd3170008 []    10.10.1.107:9997
4;\x00\x00\x0C\xCC srv:dir []    /t-00000bj
4;\x00\x00\x0C\xCC srv:lock []    tservers/10.10.1.209:9997/zlock-0000000000$144274cd317000b
4;\x00\x00\x0C\xCC srv:time []    M0
4;\x00\x00\x0C\xCC ~tab:~pr []    \x01\x00\x00\x06f
4;\x00\x00\x133 srv:dir []    /t-000002h
4;\x00\x00\x133 srv:lock []    tservers/10.10.1.209:9997/zlock-0000000000$144274cd317000b
4;\x00\x00\x133 srv:time []    M0
4;\x00\x00\x133 ~tab:~pr []    \x01\x00\x00\x0C\xCC
{code}

We think this may be the relevant message in the master debug logs:

{code}
2014-02-12 19:13:31,397 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
2014-02-12 19:13:31,459 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
2014-02-12 19:13:31,524 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
2014-02-12 19:13:31,588 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
2014-02-12 19:13:31,662 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
2014-02-12 19:13:31,725 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
2014-02-12 19:13:31,788 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
2014-02-12 19:13:31,854 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
2014-02-12 19:13:31,917 [tableOps.CleanUp] DEBUG: Still waiting for table to be deleted: 4
saw inconsistencynull 4;^@^@^L?;^@^@^Ff
...etc
{code}

Graceful accumulo reboot hangs. 

Hard reboot of everything (control-c'd) clears the problem.



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