IBM Data Platform Ideas Portal for Customers


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Status Future consideration
Workspace Db2 for z/OS
Created by Guest
Created on Oct 8, 2025

RELATED IDEAS

Modify RQSTWLB behavior when JDBC connections use mismatched DDF alias and port combinations

When there are multiple DDF aliases using different ports, it is currently possible to connect to db2 using the wrong port and alias combination. Ideally this connection would terminate with an error instead of connecting, but that may be too significant of a change. 
The invalid connection is particularly painful when RQSTWLB is enabled on the alias. Subsequent connections will default to port 0 instead of a desired port and cause connection failures for the application. Changing this default behavior for RQSTWLB to not use port 0 and instead reuse their initial connection would resolve the connection issue but has the downside of essentially 'disabling' RQSTWLB high availability benefits. Adding monitoring of these mix-matched alias / port connections would allow the db2 team to alert the application and have them correct their connection string to re-enable RQSTWLB behavior. 

It is challenging to enable RQSTWLB for all traffic without assurances there will not be additional application impacts from the current port 0 default. The added monitoring can assist in providing this assurance.  

Needed By Yesterday (Let's go already!)

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