Created question in FIWARE Q/A platform on 17-02-2016 at 10:02
Please, ANSWER this question AT https://stackoverflow.com/questions/35452086/proton-cep-100-cpu-usage-after-a-few-hours

Question:
Proton CEP: 100% CPU usage after a few hours

Description:
I have a Proton CEP instance deployed on my own server with 2 CPUs and 4GB RAM.

After leaving it working overnight, CPU usage increases heavily, up to 100% of each core. The command being executed is:

java -Djava.security.egd=file:/dev/./urandom -Djava.awt.headless=true -Xmx512m -XX:MaxPermSize=256m -XX:+UseConcMarkSweepGC -classpath /usr/share/tomcat/bin/bootstrap.jar:/usr/share/tomcat/bin/tomcat-juli.jar:/usr/share/java/commons-daemon.jar -Dcatalina.base=/usr/share/tomcat -Dcatalina.home=/usr/share/tomcat -Djava.endorsed.dirs= -Djava.io.tmpdir=/var/cache/tomcat/temp -Djava.util.logging.config.file=/usr/share/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager org.apache.catalina.startup.Bootstrap start

Looking at the logs, I also see:

Feb 17, 2016 10:00:00 AM com.ibm.hrl.proton.server.executorServices.SimpleThreadFactory$ProtonExceptionHandler uncaughtException
SEVERE: Uncaught exception in thread: Thread[31516,5,main],exception: Java heap space
Feb 17, 2016 10:02:31 AM com.ibm.hrl.proton.server.executorServices.SimpleThreadFactory$ProtonExceptionHandler uncaughtException
SEVERE: Uncaught exception in thread: Thread[31643,5,main],exception: Java heap space

Althought from htop it seems that up to 2 GB of RAM are still free.

Is this normal?

The same server is also running Orion, but that one is not experiencing issues.