java.lang.OutOfMemoryError: allocLargeObjectOrArray

Solution Verified - Updated -


  • JBoss Enterprise Application Platform (EAP)
    • 5.x
  • JRockit


  • We see errors caused by the following OOME on JBoss:
            java.lang.OutOfMemoryError: allocLargeObjectOrArray - Object size: 25488, Num elements: 25466


Consider migrating to one of compatible JVMs mentioned here.

  • Adjust the following options as needed to allow for this larger object to be allocated:
    • -XXlargeObjectLimit=70k
    • -XXtlaSize:min=70k,preferred=96k
    • -XXminBlockSize=96k
  • Ensure these options have the following relationship:
    -XXlargeObjectLimit <= -XXtlaSize <= -XXminBlockSize

  • Check the associated stack trace to see if the code called is generating unneccessarily large objects.

Note: These values are for reference only.

Root Cause

  • This is likely an indication that Thread Local Area(TLA) sizes or object limits are being exceeded (JRockit specific options).
    Refer link

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