[jira] [Created] (QPID-6224) Inappropriate use Environment.cleanLog in the BDB store

["Keith Wall (JIRA)" <ji...@apache.org>]

Keith Wall created QPID-6224:
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             Summary: Inappropriate use Environment.cleanLog in the BDB store
                 Key: QPID-6224
                 URL: https://issues.apache.org/jira/browse/QPID-6224
             Project: Qpid
          Issue Type: Bug
          Components: Java Broker
    Affects Versions: 0.30, 0.28, 0.12
            Reporter: Keith Wall
            Assignee: Keith Wall


The BDB store uses JE's Environment.cleanLog() on closing a virtualhost in order to ensure that the transaction log is clean, that is the redundancy is removed and it occupies as little space as possible.

JE's javadoc makes specific recommendations about how this method is to be used (cleaner thread shutdown and perform a checkpoint), but the BDB coding does not heed this advice.

https://docs.oracle.com/cd/E17277_02/html/java/com/sleepycat/je/Environment.html#cleanLog()

This has been seen to leave behind very large transaction logs. These  slow startup time and in the HA case, can mean that nodes are forced to ship (network restore) more data than is necessary across the network.






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