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  1. JDK
  2. JDK-8280002

jmap -histo may leak stream

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    • svc
    • b06

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        JDK-8215624 added parallel heap iteration to both `jmap -histo` and `jcmd GC.class_histogram`. When called with an explicit file and an invalid argument for number of threads, it leaks the file (bit of memory and a handle).

        Example:

        jmap -histo:parallel=notanumber,file=xx.txt

        Can only be reproduced with jmap. jcmd is safe, since `GC.class_histogram` handles argument for the `-parallel` option in shared code, and there it is done correclty.

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                stuefe Thomas Stuefe
                stuefe Thomas Stuefe
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