Hello Revenera Team,

we are encountering the following error during a license server synchronization from one of our customers:

MessageType="Error message" 

Error="Unexpected exception while generating response" 

ErrorDetail="EMS operation failed: java.lang.RuntimeException: java.util.ConcurrentModificationException."

We have already checked all server log files under

/opt/FlexNet-Operations/components/wildfly/standalone/log/

but could not find any related stack trace or runtime occurrence of the exception.

Could you please help us understand:

• What typically causes a
• ConcurrentModificationException in the EMS layer of FNO?
• Which component or log should be checked further for more detailed diagnostics?
• Whether this issue could be linked to concurrent API or synchronization calls from the license server?

Any guidance or diagnostic steps would be greatly appreciated. Thank you in advance for your support!

Kind regards,

Sowmya Chandrasekaran

Advantest Europe GmbH