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From "James Strachan" <james.strac...@gmail.com>
Subject Re: Shared File System Master Slave with Windows
Date Tue, 03 Apr 2007 07:49:28 GMT
On 4/3/07, pdvyuan <pdvyuan@gmail.com> wrote:
> Hi all,
>
> Can I use a shared windows file system to achieve "Shared File System Master Slave"?
I have made some tests, but occasionally some error would occur. I made the test under 2 instances
of activemq-4.2 runing on WinXP. The errors are as follows:
>
> 2007-03-30 17:04:33,640 [28.64.7.49:4858] DEBUG JournalMessageStore            - Journalled
message add for: ID:xuj01-a7d120-3614-1174637145906-0:0:1:1:296058, at: 39:3829174
> 2007-03-30 17:04:33,687 [eckpoint Worker] DEBUG JournalPersistenceAdapter      - Checkpoint
started.
> 2007-03-30 17:04:33,703 [8.64.7.111:1333] DEBUG JournalMessageStore            - Journalled
message remove for: ID:xuj01-a7d120-3615-1174637145921-1:0:1:1:109282, at: 39:3830090
> 2007-03-30 17:04:33,781 [eckpoint Worker] DEBUG JournalPersistenceAdapter      - Marking
journal at: 39:3829174
> 2007-03-30 17:04:33,781 [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:400)
>  at org.apache.activemq.store.journal.JournalPersistenceAdapter$2.iterate(JournalPersistenceAdapter.java:128)
>  at org.apache.activemq.thread.DedicatedTaskRunner.runTask(DedicatedTaskRunner.java:88)
>  at org.apache.activemq.thread.DedicatedTaskRunner.access$000(DedicatedTaskRunner.java:25)
>  at org.apache.activemq.thread.DedicatedTaskRunner$1.run(DedicatedTaskRunner.java:39)
> 2007-03-30 17:04:33,781 [eckpoint Worker] DEBUG JournalPersistenceAdapter      - Checkpoint
done.
>
> Is this error due to the insufficient support of "exclusive file locks" by Windows.

The above looks like a bug. I'm guessing you've used a fairly old
snapshot of 4.2, I'd recommend using a recent one from the end of
March 2007 which no longer uses activeio AFAIK.

http://people.apache.org/repo/m2-snapshot-repository/org/apache/activemq/apache-activemq/4.2-SNAPSHOT/

-- 

James
-------
http://radio.weblogs.com/0112098/

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