Max Kuchin created GROOVY-7498:
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Summary: 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
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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