Inexplicable Full GCs with the G1 collector

Solution In Progress - Updated -

Issue

  • We're using the G1 collector. A few times a day we see pausing Full GCs, but we can't see why since there's plenty of heap available:

    [Full GC 2714M->2033M(8192M), 25,3463589 secs]
    

    [Times: user=34,24 sys=0,53, real=25,35 secs]

Environment

  • Java 7
  • JBoss Enterprise Application Platform
    • 5.2.0
    • 6.x

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