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From "David Van Couvering (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-293) Correlate client connection with embedded connection
Date Thu, 23 Jun 2005 14:34:09 GMT
    [ http://issues.apache.org/jira/browse/DERBY-293?page=comments#action_12314329 ] 

David Van Couvering commented on DERBY-293:
-------------------------------------------

Derby log messages print out the SESSID, which now can be correlated with the embedded client
connection toString value, and the DRDAID, which is the DRDA correlation token (CRRTKN) +
a connection id.  

I would like to propose that this item can be resolved by having the client connection toString()
include the CRRTKN in the same display format as the derbylog file.  This would allow a debugger
to correlate the output from the error log with the specific client connection they want to
trace.


> Correlate client connection with embedded connection
> ----------------------------------------------------
>
>          Key: DERBY-293
>          URL: http://issues.apache.org/jira/browse/DERBY-293
>      Project: Derby
>         Type: Improvement
>     Versions: 10.1.1.0
>  Environment: N/A
>     Reporter: David Van Couvering
>     Priority: Minor
>      Fix For: 10.2.0.0

>
> There should be a way for someone to correlate a given embedded connection with its matching
network client connection, if such a client connection exists.  
> See 
> http://article.gmane.org/gmane.comp.apache.db.derby.devel/3748
> and
> http://article.gmane.org/gmane.comp.apache.db.derby.devel/3942
> for some background info on how to get useful information out of the DRDA protocol
> stream to accomplish this.
> This could be done either by modifying the toString() method of an embedded
> connection to show its associated network client connection information or (my
> preference) include this information in the proposed Connection VTI (see DERBY-292).
 I am worried that if we use toString() for this, the output will be overly long and complicated;
also, over a period of time the same embedded connection may be associated with multiple client
connections, resulting in a changing toString() value for the embedded connection.  This seems
problematic if we are intending toString() to uniquely identify a connection for the lifetime
of the connection -- this would be a good goal to have as it would enable us to do some useful
debugging using the VTIs.

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