Hi everyone,

Recently I've noticed that most of the nodes have OpsCenter agents running at 300% CPU. Each node has 4 cores, so agents are using 75% of total available CPU.

We're running 5 nodes with OpenSource Cassandra 2.1.8 in AWS using Community AMI. OpsCenter version is 5.1.3. We're using Oracle Java version 1.8.0_45.

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
31501 cassandr  20   0 3599m 296m  14m S  339  2.0  48:20.39 /opt/jdk/jdk1.8.0_45/bin/java -Xmx128M -Djclouds.mpu.parts.magnitude=100000 -Djclouds.mpu.parts.size=16777216 -Dopscenter.ssl.trustStore=/var/lib/datastax-agent/ssl/agentKeyStore -Dopscenter.ssl.keyStore=/var/lib/datastax-agent/ssl/agentKeyStore -Dopscenter.ssl.keyStorePassword=opscenter -Dagent-pidfile=/var/run/datastax-agent/datastax-agent.pid -Dlog4j.configuration=file:/etc/datastax-agent/log4j.properties -Djava.security.auth.login.config=/etc/datastax-agent/kerberos.config -jar datastax-agent-5.1.3-standalone.jar /var/lib/datastax-agent/conf/address.yaml

The logs from the agent looks strange to me: https://gist.github.com/kluyg/21f78af7adff0a940ed3

The cluster itself seems to be fine, the load is small, nothing bad in Cassandra system.log.

Does anyone know what to tune to bring it back to normal?

Thanks,
Mikhail