Listing any object class consuming more that 1MB heap:
Class Instance Count Total Size
>From OOME #1:
class [B 218464 1586472174
class java.util.TreeMap$Entry 66290 2717890
class org.apache.hadoop.hbase.HStoreKey 82446 2638272
class [C 27979 2500094
class [J 228 1822792
class [Lorg.apache.hadoop.io.WritableComparable; 222 1822176
>From OOME #2:
class [B 1797666 1509873770
class java.util.TreeMap$Entry 559306 22931546
class org.apache.hadoop.hbase.HStoreKey 682715 21846880
class [J 264 3154840
class [Lorg.apache.hadoop.io.WritableComparable; 250 3004704
class [C 30355 2722664
>From OOME #3:
class [B 1329127 1528647389
class java.util.TreeMap$Entry 407549 16709509
class org.apache.hadoop.hbase.HStoreKey 512322 16394304
class [C 29284 2592440
class [J 234 2585992
class [Lorg.apache.hadoop.io.WritableComparable; 229 2585424
>From OOME #4:
class [B 1928882 1363752468
class java.util.TreeMap$Entry 575415 23592015
class org.apache.hadoop.hbase.HStoreKey 712688 22806016
class [J 359 3937200
class [Lorg.apache.hadoop.io.WritableComparable; 352 3791808
class [C 35421 3264820
I can provide access to the heap dumps or JHAT instances if someone would like.
- Andy
