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From Nadav Hoze <Nadav.H...@dbMotion.com>
Subject database in a an inconsistent stat, after a communications error has been detected: Connection reset by peer: socket write error
Date Sun, 13 Jun 2010 09:35:38 GMT

We have a service in our company that works with derby embedded db in a server mode.
I have an ongoing task which uses the db, and in one of the times I got the following exception:

:52:44.961 WARN  - JDBCExceptionReporter.java:77 (logExceptions) - SQL Error: 40000, SQLState:
07:52:44.961 ERROR - JDBCExceptionReporter.java:78 (logExceptions) - A communications error
has been detected: Connection reset by peer: socket write error.

When I tried to reconnect to the server again I got the followings:
"SQL State XJ041 Error Code 40000"  Which mean by the derby manual:
XJ041  - Failed to create database '<databaseName>', see the next exception for

So I removed the property create=true and I got:
got "SQL State XJ040 Error Code 40000" Which means by the manual:
XJ040 -  Failed to start database '<databaseName>' with class loader <classLoader>,
see the next exception for details.

This probably points that my database was in an inconsistent state (something similar: http://www-01.ibm.com/support/docview.wss?rs=180&context=SSEQTP&dc=DB560&dc=DB520&uid=swg21288806&loc=en_US&cs=UTF-8&lang=en&rss=ct180websphere).

I read the from the derby site: http://db.apache.org/derby/manuals/develop/develop13.html#HDRSII-DEVELOP-18166
that a
A transaction log prevent the DB from being in an un-persistent state.
So my guessing is that maybe writing to the log  failed...?

Is there any solution to this and I do not mean automated backups, the db must be persistent
even if writing to the log failed.
Maybe something to tune ?

Nadav hoze
Java programmer
dbMotion Ltd.
Direct: +972-8-6206802
Extension number: 6802
Mobile: 972-54-4821606
E-mail: nadav.hoze@dbMotion.com<mailto:nadav.hoze@dbMotion.com>

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