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Status Future consideration
Workspace Data Virtualization Manager for z/OS
Created by Guest
Created on Feb 24, 2023

RELATED IDEAS

Improve JDBC’s SQLException Error codes

See this idea on ideas.ibm.com

We have observed that, when we get an SQL Exception caused by different situations related to client-server communication issues, we always get an ErrorCode = 0  (((SQLException)sqle).getErrorCode())

For example,

in case we have an open connection to a DVM and the DVM server is down we usually get an exception with this cause:

Caused by: java.io.IOException: [DV][JDBC Driver][3.1.202112191641] Unexpected end of input stream java.net.SocketInputStream@ade015 (read 0 out of an expected 4 bytes)

we get ErrorCode=0

 

 in case we have an open connection to a DVM and the connection is killed:

Caused by: java.net.SocketException: Connection reset by peer: socket write error

we get ErrorCode=0

 

 We want to be able to control communication issues in a high availability scenario: we have some DVM servers  load balanced by a VIPA; in case of a communication failure, in most of the cases, we can recover the situation just reopening the connection to the VIPA.

If you pass a range of error codes for any communication failure,  we can handle the exception with a simple “if ErrorCode = communicationErrorCode….”.

Now we must implement our code based on the “causes” we have catched in the past.

In any case, we think that the ErrorCode = 0 is not a valid error code for the described exceptions.

 

Needed By Quarter

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