performance - Detecting cause of java app freezing -

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we have problem our java application. (once per several month) app pauses 2-5 seconds. notice loss of heartbeats set of our network clients. , app log don't have records during freeze time span. gc logs don't show cause of application freeze 5! seconds.

brief application profile:

  • solaris solaris zones
  • java 1.6
  • about 50 incoming , outgoing network connections (lbm on tcp/ip , udp, jms , jmx/rmi on tcp/ip),
  • 3gb memory,
  • about 100+ threads

could suggest tools/approaches allow identify root cause.


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