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Re: [aspectj-users] please help: heap space ballooning when I use aspectJ with my webapplication

Hello,

What version of AspectJ are you on?

Andy

On 13 May 2010 03:22, Ashank <k_arvind_shankar@xxxxxxxxx> wrote:
>
> Hello!
>
>
> I've been having heap space build up issue when using AspectJ with my web
> application in tomcat. I am new to memory profiling. I used JConsole and jmx
> to monitor my web application and see the eden space regularly build up and
> fall down (may be normal behavior). As and when I use my web application,
> browse some JSP pages in it and execute some classes, I monitor the process
> in windows TaskManager and the memory used builds up steadily until it is 4
> times that of what it takes without AspectJ; even taking more than 100MB
> from -Xmx option to java. It does not seem to behave like a leak. If I
> manually perform GC, the used heap memory comes down to acceptable levels
> whereas the committed memory and process memory (in windows task manager)
> stays the same. I created some heap dumps in various stages and studied them
> using IBM heap analyzer and I regularly see the ApplicationShutdownHooks
> object occupy atleast 75% of the heap space. I have included some excerpts
> from the heap analyzer tree view for illustration.
>
> It starts off like this....
>
> 46,663,513 (87%) [76] 2 class java/lang/ApplicationShutdownHooks 0x10192a08
>  46,663,437 (87%) [36] 1 java/util/IdentityHashMap 0x143491d0
>  46,663,401 (87%) [256] 4 array of [Ljava/lang/Object; 0x143491f8
>   46,662,794 (87%) [108] 6 java/util/logging/LogManager$Cleaner 0x14349308
>    34,055,487 (63%) [43] 4 java/lang/ThreadGroup 0x14110738
>     33,121,075 (61%) [43] 3 java/lang/ThreadGroup 0x14110768
>      33,113,794 (61%) [32] 8 array of [Ljava/lang/Thread; 0x14110798
>       33,089,033 (61%) [104] 7 java/lang/Thread 0x172b1628
>        33,088,750 (61%) [146] 27
> org/apache/catalina/loader/WebappClassLoader 0x144298b0
>         29,174,994 (54%) [21] 1 java/security/AccessControlContext
> 0x1442a9a8
>          29,174,973 (54%) [8] 2 array of [Ljava/security/ProtectionDomain;
> 0x1442a9c0
>           29,173,778 (54%) [26] 4 java/security/ProtectionDomain 0x1413d6d0
>            29,172,921 (54%) [105] 18
> org/apache/catalina/loader/StandardClassLoader 0x1413d860
>             28,822,272 (53%) [24] 1 java/util/Vector 0x1413e0b0
>              28,822,248 (53%) [1,280] 289 array of [Ljava/lang/Object;
> 0x14575ea0
>
>
> The following sections show some aspectj classes deep down in the same heap
> dump tree view
>
> 4,027,262 (7%) [128] 14 org/apache/tomcat/util/threads/ThreadWithAttributes
> 0x146c5720
>  3,634,063 (6%) [20] 1 java/lang/ThreadLocal$ThreadLocalMap 0x1566f1b8
>  3,634,043 (6%) [128] 14 array of
> [Ljava/lang/ThreadLocal$ThreadLocalMap$Entry; 0x15e60a78
>   1,633,532 (3%) [28] 3 java/lang/ThreadLocal$ThreadLocalMap$Entry
> 0x1566f210
>    1,633,504 (3%) [16] 1 org/aspectj/weaver/tools/WeavingAdaptor$1
> 0x1427cad8
>     1,633,488 (3%) [122] 24
> org/aspectj/weaver/loadtime/ClassLoaderWeavingAdaptor 0x1427cae8
>      1,574,501 (2%) [171] 18 org/aspectj/weaver/ltw/LTWWorld 0x1427cb68
>       1,263,000 (2%) [61] 9 org/aspectj/weaver/CrosscuttingMembersSet
> 0x142b3e50
>        1,262,519 (2%) [40] 3 java/util/HashMap 0x142b3e90
>         1,262,455 (2%) [64] 8 array of [Ljava/util/HashMap$Entry;
> 0x142b3ed8
>          319,167 (0%) [24] 2 java/util/HashMap$Entry 0x142b3f28
>           318,128 (0%) [133] 13 org/aspectj/weaver/ReferenceType 0x142b0148
>            303,121 (0%) [140] 17 org/aspectj/weaver/bcel/BcelObjectType
> 0x148b9be0
>             284,449 (0%) [97] 12 org/aspectj/weaver/bcel/LazyClassGen
> 0x148be6e8
>             15,058 (0%) [94] 11 org/aspectj/apache/bcel/classfile/JavaClass
> 0x148b9e20
>             2,457 (0%) [4] 1 array of
> [Lorg/aspectj/weaver/ResolvedPointcutDefinition; 0x148cfa10
>             228 (0%) [16] 2 org/aspectj/weaver/SourceContextImpl 0x148b9d30
>             201 (0%) [25] 2 org/aspectj/weaver/WeaverStateInfo 0x148d0680
>             180 (0%) [24] 1 java/lang/String 0x148b9c70
>             98 (0%) [24] 1 java/lang/String 0x148b9fc0
>             60 (0%) [20] 1 java/util/ArrayList 0x148d0820
>             60 (0%) [20] 1 java/util/ArrayList 0x148d07d0
>             58 (0%) [50] 5 org/aspectj/weaver/patterns/PerFromSuper
> 0x148d0778
>             32 (0%) [32] 8 array of [Lorg/aspectj/weaver/ResolvedMember;
> 0x148cf9c8
>             24 (0%) [24] 1 java/lang/String 0x148b9fa8
>             24 (0%) [24] 2 java/lang/ref/WeakReference 0x148d0870
>             24 (0%) [24] 2 java/lang/ref/WeakReference 0x148d0888
>             20 (0%) [20] 0 org/aspectj/weaver/AjAttribute$WeaverVersionInfo
> 0x148cf9f8
>             8 (0%) [8] 2 array of [Lorg/aspectj/weaver/ResolvedMember;
> 0x148cf9b0
>             318,128 (0%) [133] 13 org/aspectj/weaver/ReferenceType
> 0x142b0148
>            14,514 (0%) [65] 14 org/aspectj/weaver/CrosscuttingMembers
> 0x142b0320
>
>
> Here is another excerpt branching off from the above tree
>
> 319,167 (0%) [24] 2 java/util/HashMap$Entry 0x142b3f28
>  318,128 (0%) [133] 13 org/aspectj/weaver/ReferenceType 0x142b0148
>  303,121 (0%) [140] 17 org/aspectj/weaver/bcel/BcelObjectType 0x148b9be0
>   284,449 (0%) [97] 12 org/aspectj/weaver/bcel/LazyClassGen 0x148be6e8
>    276,289 (0%) [20] 1 java/util/ArrayList 0x148c07a8
>     276,269 (0%) [40] 8 array of [Ljava/lang/Object; 0x148c07c0
>      270,593 (0%) [83] 8 org/aspectj/weaver/bcel/LazyMethodGen 0x148c0cf0
>       269,153 (0%) [24] 3 org/aspectj/apache/bcel/generic/InstructionList
> 0x148c0f80
>        268,717 (0%) [28] 3
> org/aspectj/apache/bcel/generic/InstructionHandle 0x148c0f98
>         268,491 (0%) [28] 4
> org/aspectj/apache/bcel/generic/InstructionHandle 0x148c0fb8
> After this there is a big list of the above the BCEL InstructionHandle
> objects.
>
> I am not sure what to make of the above data. Is this connected to aspectJ?
> As I've mentioned, I notice this only when I enable aspectj in my web
> application and include my aspects (which are not carelessly written).
> Please help me out as such a memory performance will be a show stopper if
> there is no way around! Thanks a lot in advance.
>
> -Arvind
> --
> View this message in context: http://aspectj.2085585.n4.nabble.com/please-help-heap-space-ballooning-when-I-use-aspectJ-with-my-webapplication-tp2197371p2197371.html
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