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Posted to issues@activemq.apache.org by "Christopher L. Shannon (JIRA)" <ji...@apache.org> on 2018/04/19 15:16:01 UTC
[jira] [Closed] (AMQ-6936) Dead loop on log file reading
[ https://issues.apache.org/jira/browse/AMQ-6936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Christopher L. Shannon closed AMQ-6936.
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Resolution: Duplicate
> Dead loop on log file reading
> -----------------------------
>
> Key: AMQ-6936
> URL: https://issues.apache.org/jira/browse/AMQ-6936
> Project: ActiveMQ
> Issue Type: Bug
> Components: KahaDB
> Affects Versions: 5.13.4
> Reporter: Rural Hunter
> Priority: Critical
>
> We restarted our activemq instance(5.13.4) but found it hung on recovering data. I got the data and ran a debug and found these:
> # The dead loop is in Journal.getNextLocation(Location location)
> # I added log in the method and this is I got:
> 2018-03-23 14:56:43 [DEBUG] Journal Get next location for: 7:33554239
> 2018-03-23 14:56:43 [DEBUG] Journal Reading location: 7:33554330
> 2018-03-23 14:56:43 [DEBUG] Journal Location 7:33554330: offset=33554330, size=28, type=2
> 2018-03-23 14:56:43 [DEBUG] Journal Reading location: 7:33554358
> 2018-03-23 14:56:43 [DEBUG] Journal Location 7:33554358: offset=33554358, size=91, type=1
> 2018-03-23 14:56:43 [DEBUG] Journal Get next location for: 7:33554358
> 2018-03-23 14:56:43 [DEBUG] Journal Reading location: 7:33554449
> 2018-03-23 14:56:43 [DEBUG] Journal Location 7:33554449: offset=33554449, size=0, type=0
> 2018-03-23 14:56:43 [DEBUG] Journal Reading location: 7:33554432
> 2018-03-23 14:56:43 [DEBUG] Journal Location 7:33554432: offset=33554432, size=0, type=0
> 2018-03-23 14:56:43 [DEBUG] Journal Reading location: 7:33554432
> 2018-03-23 14:56:43 [DEBUG] Journal Location 7:33554432: offset=33554432, size=0, type=0
> 2018-03-23 14:56:43 [DEBUG] Journal Reading location: 7:33554432
> 2018-03-23 14:56:43 [DEBUG] Journal Location 7:33554432: offset=33554432, size=0, type=0
> 2018-03-23 14:56:43 [DEBUG] Journal Reading location: 7:33554432
> 2018-03-23 14:56:43 [DEBUG] Journal Location 7:33554432: offset=33554432, size=0, type=0
> 2018-03-23 14:56:43 [DEBUG] Journal Reading location: 7:33554432
> 2018-03-23 14:56:43 [DEBUG] Journal Location 7:33554432: offset=33554432, size=0, type=0
> # 33554432 is the max log file size. activemq read a location at the end of the file and the size is 0, this causes the dead loop
> I don't know if this is a problem when the file is saved or there is something need to be fixed when reading.
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