Thanks for your solution. Once the main servlet(riskmap) called image servlet (createjpg), createjpg writes to a log file after it generating the image. I can see riskmap call to createjpg is working fine. But the virtual image does not come to the parent servlet(riskmap). The parent (riskmap) servlet does not give any error. How can I trap the stack trace without it returing any exception?.
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