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From "Rural Hunter (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMQ-6936) Dead loop on log file reading
Date Fri, 23 Mar 2018 08:13:00 GMT

     [ https://issues.apache.org/jira/browse/AMQ-6936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rural Hunter updated AMQ-6936:
------------------------------
    Description: 
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.

  was:
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 Location 7:33554239: offset=33554239, size=91, type=1
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.


> 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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