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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4784) derby in network mode sporadically drops connections
Date Sat, 28 Aug 2010 00:25:53 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903731#action_12903731
] 

Kathey Marsden commented on DERBY-4784:
---------------------------------------

Please let us know as you find out more. Usually a severe protocol error like this occurs
upon some very serious error on the server side has occurred, so getting the derby.log and
full nested exception  stack traces is the first place to look. 

If that does not show anything revealing, try to understand what is going on with the database
at the time of the failure.
If it  is an actual protocol bug then  the query being performed, the amount and type of data
retrieved may be relevant.    
See  http://wiki.apache.org/db-derby/ProtocolDebuggingTips for more information on debugging
protocol issues.

Your customer may also wish to upgrade at least to 10.4.2.0 to get the latest release on that
branch after backing up their database.

> derby in network mode sporadically drops connections
> ----------------------------------------------------
>
>                 Key: DERBY-4784
>                 URL: https://issues.apache.org/jira/browse/DERBY-4784
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Server
>    Affects Versions: 10.4.1.3
>         Environment: WIndows Server 2003 SP2 with 32 bit JVM 
> java version "1.6.0_07"
> Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
> Java HotSpot(TM) Client VM (build 10.0-b23, mixed mode)
>            Reporter: Trung Tran
>            Priority: Critical
>
> We are sporadically getting "Cause: java.sql.SQLNonTransientConnectionException: A network
protocol error was encountered and the connection has been terminated: the requested command
encountered an unarchitected and implementation-specific condition for which there was no
architected message" and we will have to restart the server.  We also have received "Cause:
java.sql.SQLNonTransientConnectionException: Network protocol exception: actual code point,
4,692, does not match expected code point, 9,224.  The connection has been terminated.; nested
exception is com.ibatis.common.jdbc.exception.NestedSQLException: " which also required a
restart. 

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