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How to read tomcat thread dump?

Posted on 2014-11-17
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Last Modified: 2014-11-23
I am seeing following in my catalina.out

Heap
 par new generation   total 2359296K, used 1851392K [0x00000004c0000000, 0x0000000560000000, 0x0000000560000000)
  eden space 2097152K,  88% used [0x00000004c0000000, 0x00000005310003b8, 0x0000000540000000)
  from space 262144K,   0% used [0x0000000550000000, 0x0000000550000000, 0x0000000560000000)
  to   space 262144K,   0% used [0x0000000540000000, 0x0000000540000000, 0x0000000550000000)
 concurrent mark-sweep generation total 7864320K, used 7864319K [0x0000000560000000, 0x0000000740000000, 0x0000000740000000)
 concurrent-mark-sweep perm gen total 501704K, used 286372K [0x0000000740000000, 0x000000075e9f2000, 0x0000000800000000)

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Does it mean it is 'java.lang.OutOfMemoryError: Java heap space’ ? Thanks!
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Question by:beer9
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girionis earned 2000 total points
ID: 40449301
I think so, yes. The old generation (concurrent mark-sweep generation total) is almost full, so it will probably result in an oom error.

Why don't you use a java profiler like yourkit to analyse this sort of memory dumps?
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