Edward Sargisson created LOG4J2-269:
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             Summary: Berkeley (persistent) agent for FlumeAppender does not 
work if batch size is 1 (the default)
                 Key: LOG4J2-269
                 URL: https://issues.apache.org/jira/browse/LOG4J2-269
             Project: Log4j 2
          Issue Type: Bug
            Reporter: Edward Sargisson


Repro steps:
Use persistent agent from the FlumeAppender while the succeeding Flume agent is 
down.

Expected result:
Logs should queue.

Actual result:
2013-05-28 17:02:12,921 ERROR Unable to delete event 
java.lang.UnsupportedOperationException: A transacti
on was not supplied when opening this cursor: delete
        at com.sleepycat.je.Cursor.checkUpdatesAllowed(Cursor.java:4007)
        at com.sleepycat.je.Cursor.delete(Cursor.java:689)
        at 
org.apache.logging.log4j.flume.appender.FlumePersistentManager$WriterThread.run(FlumePersisten
tManager.java:448)

Workaround:
Set the batchSize to a number > 1.

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