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From "Max Kuchin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GROOVY-7498) Native memory leak
Date Sat, 18 Jul 2015 12:22:04 GMT

    [ https://issues.apache.org/jira/browse/GROOVY-7498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14632412#comment-14632412
] 

Max Kuchin commented on GROOVY-7498:
------------------------------------

We didn't try to change grails version, in all these tests we use grails 2.4.5.  We only changed
groovy-all jar in war file from version 2.3.11 to 2.3.7 and 2.3.8. 
Before we found workaround with downgrading groovy to 2.3.7, we tried to upgrade java from
1.7u65 to 1.7u80 and change JVM garbage collection from G1 to ConcMarkSweepGC. All this doesn't
make any effect on native memory usage and GC time growth. 
We will test java 1.8u51 in next 3 days and grails 2.4.4 with groovy 2.3.11 after that. 

> 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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