Issue
If you're seeing an error in your $CONTRAST_HOME/data/logs/contrast.log that's similar to the example below:
SEVERE: Servlet.service() for servlet [spring] in context with path [/Contrast] threw exception
[Request processing failed; nested exception is java.util.concurrent.ExecutionException:
java.lang.OutOfMemoryError: unable to create new native thread] with root cause
java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Thread.java:714)
Cause
You might be bumping up against the thread limit set by your operating system.
Resolution
To address this issue, increase the number of threads that the Contrast user can start in your /etc/security/limits.d/90-nproc.conf file.
Note: To modify a system configuration file, you must have root access or the ability to sudo. Consult your System Administrator for additional details.
You can add the line <contrast-username> soft nproc unlimited to the end of the file and restart the contrast-server using the command sudo service contrast-server restart.