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I have problem with monitoring few things on tomcat, specificaly GrabageCollectionAggregator and CPU monitoring. As in image i tried many combinations of \"\", added name=, etc but still it does not work... with other items this thread helped me jmx-tomcat-monitoring, because default template is broken.

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Kasik
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  • Please show the key of an item that works for you in this Tomcat instance. – Richlv Aug 17 '17 at 09:05
  • jmx["java.lang:type=Memory","HeapMemoryUsage.used"] works perfectly and i found out that CPU sometimes gets the value but then became not supported.. – Kasik Aug 17 '17 at 10:11
  • What is the error message when it becomes unsupported? If it's about value type, try setting it to "Numeric (float)". – Richlv Oct 02 '17 at 15:10
  • @Richlv well processCpuLoad works somehow but HeapLiveSet is still not Supported with error: com.sun.management:type=GarbageCollectionAggregator – Kasik Oct 04 '17 at 05:36
  • I think problem might be with com.sun.management because everything else works. Any ideas how to fix that? – Kasik Jan 18 '18 at 07:06
  • I recall fixing something similar a long time ago, but don't recall the details. Any useful messages in the Java gateway log? If not, try increasing the verbosity of that log. – Richlv Jan 18 '18 at 09:47

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HeapLiveSet is a synthetic item - in other words it's a client side calculated value. Those items can not be requested directly via jmx but you can calculate it yourself with all the values under LastGcInfo.

Oracle Java Mission Control

Luuklag
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user218594
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