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Introscope Agent Reports All Metrics with Value of Zero

Question asked by acdinsmore on May 2, 2013
Latest reply on Apr 22, 2015 by Hiko_Davis
We have an application that has four app servers all instrumented with Introscope. During a recent test, two of the JVMs reported a value of zero for all of the metrics for a 5 minute period during the test. The JVMs reported metrics normally before and after the 5 minute period but all metrics were "0" in the window. The other two JVMs seem unaffected as they reported metrics normally.

I have seen agents have gaps in metrics where no value is reported (usually during a GC) but never report zero for all metrics. Why would the agent report all zeroes?

Our setup:
Introscope Workstation version 9
Agent version 8.1
JVM Java version 1.6

Thanks for any thoughts.