Hi guys, I am running a mini cluster with 6 nodes, recently we see very frequent ParNewGC on two nodes. It takes 200 - 800 ms on average, sometimes it takes 5 seconds. You know, hte ParNewGC is stop-of-wolrd GC and our client throws SocketTimeoutException every 3 minutes.
I checked the load, it seems well balanced, and the two nodes are running on the same hardware: 2 * 4 cores xeon with 16G RAM, we give cassandrda 4G heap, including 800MB young generation. We did not see any swap usage during the GC, any idea about this? Then I took a heap dump, it shows that 5 instances of JmxMBeanServer holds 500MB memory and most of the referenced objects are JMX mbean related, it's kind of wired to me and looks like a memory leak. -- Thanks & Regards, Daniel
