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  1. Red Hat Fuse
  2. ENTESB-10090

[[UNDERTOW-1277] Clear XnioByteBufferPool.PooledByteBuffer pool when close() to avoid direct memory leaking] appears to be affecting camel-undertow

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    • Icon: Bug Bug
    • Resolution: Cannot Reproduce
    • Icon: Critical Critical
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    • jboss-fuse-6.3, fuse-6.x-GA
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      The attached reproducer seems to exhibit a slow leak in direct memory. Build and run the reproducer (SpringBoot) with the following jvm flags:

      -Djava.net.preferIPv4Stack=true
-verbose:gc 
-Xloggc:gc_%p_%t.log 
-XX:+PrintGCDetails 
-XX:+PrintGCTimeStamps 
-XX:+PrintGCApplicationStoppedTime
-XX:NativeMemoryTracking=detail

      After starting, find the pid of the java process and execute:

      jcmd {PID} VM.native_memory baseline

      Let the application run for some hours and periodically check the increase in native memory with:

      jcmd {PID} VM.native_memory summary.diff
      Show
      The attached reproducer seems to exhibit a slow leak in direct memory. Build and run the reproducer (SpringBoot) with the following jvm flags: -Djava.net.preferIPv4Stack= true -verbose:gc -Xloggc:gc_%p_%t.log -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCApplicationStoppedTime -XX:NativeMemoryTracking=detail After starting, find the pid of the java process and execute: jcmd {PID} VM.native_memory baseline Let the application run for some hours and periodically check the increase in native memory with: jcmd {PID} VM.native_memory summary.diff

      Application consuming memory far in excess of reported heap usage and application / pod is getting killed.

      Heap details for the application show a number (around 400 in a smallish 66MB heap) of DirectByteBuffer objects kept alive by XNIO threads that seem to point to the referenced issue.

        1. undertow-leak-reproducer-attempt.tar.gz
          10 kB

            ggrzybek Grzegorz Grzybek
            rhn-support-dhawkins Duane Hawkins
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              Created:
              Updated:
              Resolved: