jvm - Is it possible for a single Java Virtual Machine to have different id's -

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we're running several jboss instances hotspot 1.5.22 , today found jvm has 2 different vmid's. i'm seeing:

$./jinfo -flags 13278 attaching process id 13278, please wait... debugger attached successfully. server compiler detected. jvm version 1.5.0_22-b03 [flags jboss_node_b1]  $./jinfo -flags 20569 attaching process id 20569, please wait... debugger attached successfully. server compiler detected. jvm version 1.5.0_22-b03 [flags jboss_node_b1]  $./jinfo -flags 13255 attaching process id 13255, please wait... error attaching process: sun.jvm.hotspot.debugger.debuggerexception: can't attach process

now, if run "ps -ef | grep jboss_node_b1" have 1 process node running pid 13278. actually, impossible 2 instances of same node running since 1 of them crash.

this jps reporting:

$./jps 13278 -- process information unavailable 20569 -- process information unavailable 13255 -- process information unavailable 26716 jps [several other jboss jvms]

so have this:

  • jboss_node_a1: pid 13255, vmid 13255 can't monitor it
  • jboss_node_a2: pid 13278, vimd 13278 & 20569

how be? bug in 1.5.22 monitoring tools?

regards


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