Hi all,
I am planning to use ActiveMQ 5.2.0 in a project and I have made
some tests in a windows box to understand how the journal files work.
I am defining a Journaled JDBC with postgres for persistence this way.
<persistenceAdapter>
<journaledJDBC journalLogFiles="5"
dataDirectory="${activemq.base}/data" dataSource="#postgres-ds"/>
</persistenceAdapter>
Reading the docs, it seems that the journal files are used for
transaction log, and you can define how much files do you want and the
size of the files. ActiveMQ does not create new files, so it reuses the
old files. This is OK, but I was wondering what happens if the queues (I
am going to use only 2 queues) size increase long enough to use all the
files in the journal and need more space. It is not a weird scenario, as
we are decoupling consumer and producer and consumer can sometines be
offline due to maintenance routines. The result is that journal files
get overwritten, and many transactions has been lost. When I start the
consumer, it begins to consume messages, but the
JournalPersistenceAdapater fails everytime it has to execute the
checkpoint code:
2009-04-16 18:48:03,140 [eckpoint Worker] ERROR
JournalPersistenceAdapter - Failed to mark the Journal:
org.apache.activeio.journal.InvalidRecordLocationException: The location
is less than the last mark.
org.apache.activeio.journal.InvalidRecordLocationException: The location
is less than the last mark.
at
org.apache.activeio.journal.active.JournalImpl.setMark(JournalImpl.java:340)
at
org.apache.activemq.store.journal.JournalPersistenceAdapter.doCheckpoint(JournalPersistenceAdapter.java:416)
at
org.apache.activemq.store.journal.JournalPersistenceAdapter$1.iterate(JournalPersistenceAdapter.java:121)
at
org.apache.activemq.thread.DedicatedTaskRunner.runTask(DedicatedTaskRunner.java:98)
at
org.apache.activemq.thread.DedicatedTaskRunner$1.run(DedicatedTaskRunner.java:36)
I think the files are corrupted, can you confirm this?
Is the exception related to the problem described?
It is an expected behaviour? Should the maximum number of messages in a
queue be considered when configuring the journal?
Thank you very much for your help.
--
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Diego Rodríguez Martín (drodrig...@altiria.com)
ALTIRIA TIC - Servicios SMS - Desarrollo Web
www.altiria.com
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