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From "Johan Hallgren (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-660) Add support for MaxDB
Date Fri, 31 Mar 2006 02:44:13 GMT
    [ https://issues.apache.org/activemq/browse/AMQ-660?page=comments#action_35948 ] 

Johan Hallgren commented on AMQ-660:
------------------------------------

Hiram,

I've done some further testing:

+ First, with the broker stopped, I dropped the activemq_msgs and active_acks tables, and
then recreated them manually using the SQL statements you provided. The delete statement that
caused the error message then executes normally.
+ I then started the broker, and saw that the error message was still in the output. Manually
running the delete statement also gave the same error, even though both tables still contains
no data. I have attached a log dump for this startup (attached it anonymously by accident;
didn't see that my session had timed out).
+ Finally, I studied the log dump and saw that there are three indexes being created on activemq_msgs
on broker startup. Dropping the activemq_msgs_eidx makes the error message go away.
+ My initial thought was that the indices exceed MaxDB's length limit for table columns belonging
to an index (1024 bytes), but that does not seem to be the case, and in any event it is specifically
the activemq_msgs_eidx index that causes the error; dropping the other two indexes does not
resolve anything.

So, in summary, I'll ask the MaxDB mailing list about the issue. In the meantime, do let me
know if you have any other ideas that you want me to test.

> Add support for MaxDB
> ---------------------
>
>          Key: AMQ-660
>          URL: https://issues.apache.org/activemq/browse/AMQ-660
>      Project: ActiveMQ
>         Type: New Feature

>   Components: Message Store
>     Reporter: Hiram Chirino
>     Assignee: Hiram Chirino
>      Fix For: 4.0 RC 2
>  Attachments: activemq.log, activemq.log
>
>
> Originaly reported on the user mailing list:
> http://www.nabble.com/Adding-support-for-MaxDB-in-ActiveMQ-JDBC-persistence-layer-t1334466.html#a3572564

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