Open Enterprise Server 2018 (OES 2018) Linux
After upgrading to OES2018, the iPrint and PaperCut environment becomes non-responsive after many users start using the system. Users are unable to print and the PaperCut admin console is not accessible.
Increase the DefaultTasksMax setting in the /etc/systemd/system.conf file.
For more information concerning this setting refer to the SLES documentation.
Insufficient threads for the iPrint and PaperCut processes.
In the server.log file you may see messages like:
java.lang.OutOfMemoryError: unable to create new native threadWARN QueuedThreadPool:661 - Unexpected thread death:....................
ERROR AppServer:597 - Exception in thread "http-536". unable to create new native thread [http-536]