Dear Nitesh,
Hope you are doing good.
Please go through the below document and the options available for you to change:
How to Change the UME of a J2EE Engine and SAP Supported Changes
You can also change the datasource xml file itself. If the issue persists, can you attach the std_server0 and the default traces that will have more on the error?
Hope this helps.
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Kind Regards,
Hemanth
SAP Active Global Support
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