Rural Hunter created AMQ-6936: --------------------------------- Summary: 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
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. -- This message was sent by Atlassian JIRA (v7.6.3#76005)