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Rural Hunter commented on AMQ-6936: ----------------------------------- I'm not sure if it is allowed that the file size is greater than the maxFileLength. If it is allowed, then this might should be changed: else if (cur.getType() == 0) { // eof - jump to next datafile cur.setOffset(maxFileLength); => change to: cur.setOffset(dataFile.getLength()); } With the change above, my activemq instance can start up. > 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. -- This message was sent by Atlassian JIRA (v7.6.3#76005)