[jira] [Created] (AMQ-6931) KahaDB files cannot be loaded if they contain KAHA_ACK_MESSAGE_FILE_MAP_COMMAND messages

["Tim Bain (JIRA)" <ji...@apache.org>]

Tim Bain created AMQ-6931:
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             Summary: KahaDB files cannot be loaded if they contain KAHA_ACK_MESSAGE_FILE_MAP_COMMAND messages
                 Key: AMQ-6931
                 URL: https://issues.apache.org/jira/browse/AMQ-6931
             Project: ActiveMQ
          Issue Type: Bug
          Components: KahaDB
    Affects Versions: 5.13.1
            Reporter: Tim Bain


As reported on the users mailing list (http://activemq.2283324.n4.nabble.com/Re-failed-to-start-ActiveMQ-td4737631.html), a KahaDB file that contains a message of type "CmdType: KAHA_ACK_MESSAGE_FILE_MAP_COMMAND" (output is from [https://github.com/Hill30/amq-kahadb-tool]) was found to have a location size of 0, which is less than org.apache.activemq.store.kahadb.disk.journal.Journal.RECORD_HEAD_SPACE. This in turn causes a NegativeArraySizeException to be thrown in org.apache.activemq.store.kahadb.disk.journal.DataFileAccessor.readRecord() when attempting to start the broker.

 

Either the data file should not have a location size of 0 (in which case, we need to figure out how it happened and prevent it from happening again), or it's valid to have a location size of 0 and we need to account for that possibility when constructing the array in readRecord().



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