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https://issues.apache.org/jira/browse/GROOVY-7498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14621782#comment-14621782
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Jochen Theodorou commented on GROOVY-7498:
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this is indeed strange. We don't have anything that accesses native memory in
the runtime itself. There is of course the command line tools like JLine which
do, but not all the time in a server. I assume you never got an exception,
because that could have had some details. Is it possible for you to use a
different tool to trace the native memory to have more details?
> Native memory leak
> ------------------
>
> Key: GROOVY-7498
> URL: https://issues.apache.org/jira/browse/GROOVY-7498
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 2.3.11
> Environment: Ubuntu 14.04 , grails 2.4.5 java 1.7.0_80, tomcat 7.0.56
> Reporter: Max Kuchin
>
> We are experiencing JVM native memory leak after upgrading our web
> application from grails 2.4.4 (groovy 2.3.7) to grails 2.4.5 (groovy 2.3.11).
> It disappears if we replace groovy-all-2.3.11.jar in web application with
> groovy-all-2.3.7.jar.
> As a result of the leak JVM native memory usage can grow to 4G in two weeks
> after start of web application.
> We'd enabled native memory tracking (-XX:NativeMemoryTracking=detail) to
> gather some details. Here are results of native memory summary snapshot made
> with command jcmd pid VM.native_memory summary
> Native memory summary after start of application:
> Total: reserved=6039782KB, committed=6039342KB
> - Java Heap (reserved=5447680KB, committed=5447680KB)
> (mmap: reserved=5447680KB, committed=5447680KB)
> - Class (reserved=2944KB, committed=2944KB)
> (classes #19490)
> (malloc=2944KB, #56242)
> - Thread (reserved=131202KB, committed=131202KB)
> (thread #127)
> (stack: reserved=130556KB, committed=130556KB)
> (malloc=402KB, #515)
> (arena=244KB, #254)
> - Code (reserved=54669KB, committed=54261KB)
> (malloc=4749KB, #7615)
> (mmap: reserved=49920KB, committed=49512KB)
> - GC (reserved=350261KB, committed=350261KB)
> (malloc=148081KB, #28742)
> (mmap: reserved=202180KB, committed=202180KB)
> - Compiler (reserved=399KB, committed=399KB)
> (malloc=301KB, #480)
> (arena=98KB, #2)
> - Internal (reserved=14366KB, committed=14334KB)
> (malloc=14334KB, #21616)
> (mmap: reserved=32KB, committed=0KB)
> - Symbol (reserved=20911KB, committed=20911KB)
> (malloc=17355KB, #180610)
> (arena=3556KB, #1)
> - Memory Tracking (reserved=14986KB, committed=14986KB)
> (malloc=14986KB, #492)
> - Pooled Free Chunks (reserved=2365KB, committed=2365KB)
> (malloc=2365KB)
> One day after start:
>
> Total: reserved=6610742KB , committed=6610518KB
> - Java Heap (reserved=5447680KB, committed=5447680KB)
> (mmap: reserved=5447680KB, committed=5447680KB)
> - Class (reserved=5525KB, committed=5525KB)
> (classes #21209)
> (malloc=5525KB, #71960)
> - Thread (reserved=646KB, committed=646KB)
> (thread #127)
> (stack: reserved=130556KB, committed=130556KB)
> (malloc=402KB +13KB, #515)
> (arena=244KB +8KB, #254)
> - Code (reserved=58182KB, committed=57990KB)
> (malloc=8262KB, #11074)
> (mmap: reserved=49920KB, committed=49728KB)
> - GC (reserved=423906KB, committed=423906KB)
> (malloc=221726KB, #82681)
> (mmap: reserved=202180KB, committed=202180KB)
> - Compiler (reserved=440KB, committed=440KB)
> (malloc=342KB +20KB, #513)
> (arena=98KB, #2)
> - Internal (reserved=472055KB, committed=472023KB)
> (malloc=472023KB, #746397)
> (mmap: reserved=32KB, committed=0KB)
> - Symbol (reserved=21668KB +7KB, committed=21668KB +7KB)
> (malloc=17760KB +7KB, #185311)
> (arena=3908KB, #1)
> - Memory Tracking (reserved=49894KB, committed=49894KB)
> (malloc=49894KB +2464KB, #536)
> - Pooled Free Chunks (reserved=191KB, committed=191KB)
> (malloc=191KB)
> There is substantial increase in Internal memory usage and object count:
> 14366KB, #21616 -> 472023KB, #746397
> Native memory summary, one day after start, same application, different
> groovy version (groovy-all-2.3.7.jar):
> Total: reserved=6098509KB, committed=6099309KB
> - Java Heap (reserved=5447680KB, committed=5447680KB)
> (mmap: reserved=5447680KB, committed=5447680KB)
> - Class (reserved=6263KB, committed=6263KB)
> (classes #21179)
> (malloc=6263KB, #71507)
> - Thread (reserved=117771KB, committed=118799KB)
> (thread #114)
> (stack: reserved=117192KB, committed=118220KB)
> (malloc=360KB, #463)
> (arena=219KB, #228)
> - Code (reserved=58131KB, committed=57935KB)
> (malloc=8211KB, #10858)
> (mmap: reserved=49920KB, committed=49724KB)
> - GC (reserved=383041KB, committed=383041KB)
> (malloc=180861KB, #80128)
> (mmap: reserved=202180KB, committed=202180KB)
> - Compiler (reserved=268KB, committed=268KB)
> (malloc=170KB, #313)
> (arena=98KB, #2)
> - Internal (reserved=41336KB, committed=41304KB)
> (malloc=41304KB, #69639)
> (mmap: reserved=32KB, committed=0KB)
> - Symbol (reserved=21696KB, committed=21696KB)
> (malloc=17788KB, #185505)
> (arena=3908KB, #1)
> - Memory Tracking (reserved=22135KB, committed=22135KB)
> (malloc=22135KB, #432)
> - Pooled Free Chunks (reserved=189KB, committed=189KB)
> (malloc=189KB)
> Internal memory consumption, one day after start, comparing groovy 2.3.7 to
> groovy 2.3.11:
> 41336KB, #69639 - groovy 2.3.7
> 472023KB, #746397 - groovy 2.3.11, more than 10 times increase.
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