Fail Fast or Warn on using fileCursors/fileQueueCursors when <broker
persistent="false">
----------------------------------------------------------------------------------------
Key: AMQ-3444
URL: https://issues.apache.org/jira/browse/AMQ-3444
Project: ActiveMQ
Issue Type: Improvement
Components: Broker
Affects Versions: 5.5.0
Reporter: Jason Whaley
When working with a broker config for a client, we attempted to use fileCursors
and fileQueueCursors on all destinations. What we noticed when monitoring JMX
for specific queues was behavior of vmCursors. Once the memoryLimit for an
individual destination hit 100%, the broker then tried to spool the messages to
disk but instead failed and the following exceptions were written to log:
2011-08-09 13:50:22,892 [Usage Async Task ] ERROR
FilePendingMessageCursor - Caught an IO Exception getting the DiskList
315_PendingCursor:FLEXNET-RX-REALTIME-QUEUE
java.lang.NullPointerException
at
org.apache.activemq.broker.region.cursors.FilePendingMessageCursor.getDiskList(FilePendingMessageCursor.java:454)
at
org.apache.activemq.broker.region.cursors.FilePendingMessageCursor.flushToDisk(FilePendingMessageCursor.java:432)
at
org.apache.activemq.broker.region.cursors.FilePendingMessageCursor.onUsageChanged(FilePendingMessageCursor.java:385)
at org.apache.activemq.usage.Usage$1.run(Usage.java:268)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
After eyeing the config a little more we noticed that <broker
persistent="false">. Turning that back to "true" caused messages to spool to
disk as expected.
This was obviously a misconfiguration, but there was no warning or indication
that our configuration was basically invalid and destined to fail. At a
minimum it would be useful to have a message at WARN log level that states that
fileCursor/fileQueueCursors will fail if <broker persistent="false">.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
