When using the Java low pause Concurrent Mark Sweep (CMS) garbage collector "concurrent mode failure" appears in GC logs

Solution Verified - Updated -


  • Long Garbage Collection (GC) pauses with GC log showing many concurrent mode failures.
  • The following entries are found in the GC logs
    2008-07-23-19:21:10  [GC 457890.408: [ParNew (promotion failed): 59008K->59008K(59008K), 4.7636750 secs]457895.171: [CMS457896.587: [CMS-concurrent-mark: 1.593/6.359 secs] [Times: user=6.36 sys=3.50, real=6.36 secs]  (concurrent mode failure): 1376854K->894596K(1507328K), 8.3823060 secs]
    1430906K->894596K(1566336K), [CMS Perm : 84066K->84063K(131072K)], 13.1464100 secs] [Times: user=12.90 sys=3.48, real=13.14 secs]
    Total time for which application threads were stopped: 13.1475330 seconds


  • OpenJDK
  • Oracle JDK 1.5 and later

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