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From "Mike Matrigali (JIRA)" <j...@apache.org>
Date Mon, 18 Jun 2007 18:38:26 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Mike Matrigali updated DERBY-2835:

This issue is indicative of a corruption in the table and indexes.  To determine at any given
time if there is a problem you can
run the check table command.  It will only tell you the first problem and is likely to take
a long time on such a big table as it
will check every row in the table against every row in the table.  If your db is active you
may want to make a backup and do
the checking on a copy of the db.

Running compress table may fix the existing problems in the table:

> ------------------------------------------------------------
>                 Key: DERBY-2835
>                 URL: https://issues.apache.org/jira/browse/DERBY-2835
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions:
>         Environment: Sun JDK 1.5
>            Reporter: Kurt Huwig
> I get messages like this about once a week:
> WARNING: While deleting a row from a table the index row for base table row (50813,81)
was not found in index with conglomerate id 1.297.  This problem has automatically been corrected
as part of the delete operation.
> I do not have a reproducing example besides the productive server, so here some hints
what it is doing and what happened the last few days:
> The table in question is a log file which gets a lot of updates and once it reaches a
certain limit, the oldest records will be deleted once per day.
> The database is embedded and accessed both embedded and via one network client on another
machine. Nearly all read/write requests come from the network client.
> The table's size is about 3,8 GB and contains a lot of entries (cannot check right now).
> The JVM is sometimes stopped via "killall java".
> Both machines are Linux-SMP.
> Both machines use HA-JDBC to access the database.
> Both machines have 1,5GB of memory.
> The JVM is started with -Xmx768M -Xms768M -Xss128k
> The application uses no transactions on this table.
> The network client used 4000+ simultaneous connections, sometimes reaching the ulimit
of the machine. The number of connections has been reduced to 1/10 and the ulimit has been
increased a few days ago. Still there are records in the database from this time.
> The network connection sometimes broke down as described in DERBY-2747.
> The network client gets "lock timeouts" several times a day, due to long running requests.
> The network client had a OutOfMemoryException regarding the Heap some days ago.

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