[JBoss Remoting] - PermGen Space: OutOfMemory caused by loading the same class multiple times
by Fabian Epp
Fabian Epp [https://community.jboss.org/people/fabian.epp] created the discussion
"PermGen Space: OutOfMemory caused by loading the same class multiple times"
To view the discussion, visit: https://community.jboss.org/message/749853#749853
--------------------------------------------------------------
Hello Community,
in our situation we have some server side classes which the osgi-client doesn´t have in it´s classpath. The client knows only its interfaces. The implementations will be loaded from server via Remote Class Loading.
Now the problem is, when we call a server method which returns a certain implementation, the following scenario happens::
1.) On each server call, a new ClassLoader will be created which loads all classes which is needed to create a single instance of the requested type.
2.) At the next server call, the previous loaded classes are not reused. Instead a new ClassLoader is created which loads and stores the same classes again
3.) If the loaded instances are remembered in a Collection the Garbage Collector has no chance to unload the classes because there is always exactly one existing reference.
--> So, the Perm Gen Space increases and increases till we get an PermGenSpace Out Of Memory Exception
So, my question is:
Is it possible that the same classloader load all classes so that one class is only one time?
How can it be configured?
I´m happy about every solution.
Thank you for your help:
Fabian
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11 years, 6 months
[Beginner's Corner] - Re: Nessus scan makes JBoss 5.1.0.GA stop processing web requests
by izan
izan [https://community.jboss.org/people/izan] created the discussion
"Re: Nessus scan makes JBoss 5.1.0.GA stop processing web requests"
To view the discussion, visit: https://community.jboss.org/message/719131#719131
--------------------------------------------------------------
Hi all!
I'm seeing this error also, and don't know how to get over it. I am using JBoss AS 5.1.0.GA with jboss-remoting 2.5.1, and also checked with jboss-remoting.jar 2.5.4.SP3 in client and common/lib folders (not sure if I should replace more JARs)
These are the tests that I have done so far:
1. Nessus scan on port 3873
2012-02-23 14:23:39,936 ERROR [org.jboss.remoting.transport.socket.ServerThread] (WorkerThread#4[xx.x.x.x:53826]) WorkerThread#4[x.x.x.x:53826] exception occurred during first invocation
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedConstructorAccessor199.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.jboss.remoting.transport.socket.ServerThread.createServerSocketWrapper(ServerThread.java:909)
at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:491)
at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232)
Caused by: java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2280)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2749)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:279)
at org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:100)
at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:75)
at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:58)
at org.jboss.remoting.transport.socket.ClientSocketWrapper.createInputStream(ClientSocketWrapper.java:179)
at org.jboss.remoting.transport.socket.ClientSocketWrapper.createStreams(ClientSocketWrapper.java:162)
at org.jboss.remoting.transport.socket.ClientSocketWrapper.<init>(ClientSocketWrapper.java:66)
at org.jboss.remoting.transport.socket.ServerSocketWrapper.<init>(ServerSocketWrapper.java:46)
... 6 more
2. telnet localhost 3873 throws the following exception
2012-02-23 14:23:55,246 ERROR [org.jboss.remoting.transport.socket.ServerThread] (WorkerThread#4[x.x.x.x:54029]) WorkerThread#4[x.x.x.x:54029] exception occurred during first invocation
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedConstructorAccessor199.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.jboss.remoting.transport.socket.ServerThread.createServerSocketWrapper(ServerThread.java:909)
at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:491)
at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:168)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
at java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2265)
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2278)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2749)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:279)
at org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:100)
at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:75)
at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:58)
at org.jboss.remoting.transport.socket.ClientSocketWrapper.createInputStream(ClientSocketWrapper.java:179)
at org.jboss.remoting.transport.socket.ClientSocketWrapper.createStreams(ClientSocketWrapper.java:162)
at org.jboss.remoting.transport.socket.ClientSocketWrapper.<init>(ClientSocketWrapper.java:66)
at org.jboss.remoting.transport.socket.ServerSocketWrapper.<init>(ServerSocketWrapper.java:46)
Don't know if this was solved by the original poster somehow, but if someone has a clue where to keep looking, I'd be much obliged!
--------------------------------------------------------------
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11 years, 6 months
[JBoss Remoting] - big outgoing traffic on remote call
by Berik Berentayev
Berik Berentayev [https://community.jboss.org/people/berik] created the discussion
"big outgoing traffic on remote call"
To view the discussion, visit: https://community.jboss.org/message/754287#754287
--------------------------------------------------------------
Hi!
While invoking a remote method on SLSB I have big outgoing traffic (~4KB per call).
Now we have outgoing traffic 10 times bigger that incoming. I think it's strange.
Here is the conent of outgoing packets captured by Wireshark while calling method that takes one parameter. Why it sends too many information?
Packet 1
0000 00 50 22 93 e2 e8 54 42 49 89 79 ae 08 00 45 00 .P"...TB I.y...E.
0010 05 14 48 8c 40 00 80 06 11 3b c0 a8 0d 66 c0 a8 ..H.@... .;...f..
0020 0d 66 06 25 0f 21 1a b1 a1 be 51 a7 b3 74 50 10 .f.%.!.. ..Q..tP.
0030 fc 33 be 62 00 00 77 01 16 79 73 72 00 24 6f 72 .3.b..w. .ysr.$or
0040 67 2e 6a 62 6f 73 73 2e 72 65 6d 6f 74 69 6e 67 g.jboss. remoting
0050 2e 49 6e 76 6f 63 61 74 69 6f 6e 52 65 71 75 65 .Invocat ionReque
0060 73 74 a2 be 53 16 45 d7 9c 37 02 00 06 4c 00 03 st..S.E. .7...L..
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0080 2f 4f 62 6a 65 63 74 3b 4c 00 07 6c 6f 63 61 74 /Object; L..locat
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00a0 72 65 6d 6f 74 69 6e 67 2f 49 6e 76 6f 6b 65 72 remoting /Invoker
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00d0 61 2f 75 74 69 6c 2f 4d 61 70 3b 4c 00 0d 72 65 a/util/M ap;L..re
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00f0 4c 00 09 73 65 73 73 69 6f 6e 49 64 74 00 12 4c L..sessi onIdt..L
0100 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 java/lan g/String
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0190 6f 64 49 6e 76 6f 63 61 74 69 6f 6e ed c4 bc d8 odInvoca tion....
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01c0 6e 74 2e 49 6e 76 6f 63 61 74 69 6f 6e 42 61 73 nt.Invoc ationBas
01d0 65 bc 45 e1 c2 b9 c8 19 47 02 00 01 4c 00 08 6d e.E..... G...L..m
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0200 61 2f 53 69 6d 70 6c 65 4d 65 74 61 44 61 74 61 a/Simple MetaData
0210 3b 78 70 77 08 6b ea 05 1c c4 74 2d a9 73 72 00 ;xpw.k.. ..t-.sr.
0220 19 6a 61 76 61 2e 72 6d 69 2e 4d 61 72 73 68 61 .java.rm i.Marsha
0230 6c 6c 65 64 4f 62 6a 65 63 74 7c bd 1e 97 ed 63 lledObje ct|....c
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0320 70 6c 65 4d 65 74 61 44 61 74 61 ca 3f 5c 5f b0 pleMetaD ata.?\_.
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03d0 2e 72 65 6d 6f 74 69 6e 67 2e 49 6e 76 6f 6b 65 .remotin g.Invoke
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04d0 72 72 61 79 4c 69 73 74 78 81 d2 1d 99 c7 61 9d rrayList x.....a.
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0510 65 72 bd 33 e8 b8 54 d4 33 02 00 02 49 00 04 70 er.3..T. 3...I..p
0520 6f 72 or
Packet 2:
0000 00 50 22 93 e2 e8 54 42 49 89 79 ae 08 00 45 00 .P"...TB I.y...E.
0010 05 14 48 8d 40 00 80 06 11 3a c0 a8 0d 66 c0 a8 ..H.@... .:...f..
0020 0d 66 06 25 0f 21 1a b1 a6 aa 51 a7 b3 74 50 10 .f.%.!.. ..Q..tP.
0030 fc 33 03 1b 00 00 74 4c 00 04 68 6f 73 74 71 00 .3....tL ..hostq.
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01c0 74 72 75 63 74 69 6f 6e 44 65 6c 61 79 3d 31 38 truction Delay=18
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0340 61 6e 67 2f 53 74 72 69 6e 67 3b 4c 00 0b 73 75 ang/Stri ng;L..su
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0470 6b 2e 4a 42 6f 73 73 43 61 6c 6c 62 61 63 6b 48 k.JBossC allbackH
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0500 2e 53 75 62 6a 65 63 74 49 6e 66 6f 00 00 00 00 .Subject Info....
0510 00 00 00 01 02 00 03 4c 00 14 61 75 74 68 65 6e .......L ..authen
0520 74 69 ti
Packet 3:
0000 00 50 22 93 e2 e8 54 42 49 89 79 ae 08 00 45 00 .P"...TB I.y...E.
0010 03 e9 48 8e 40 00 80 06 12 64 c0 a8 0d 66 c0 a8 ..H.@... .d...f..
0020 0d 66 06 25 0f 21 1a b1 ab 96 51 a7 b3 74 50 18 .f.%.!.. ..Q..tP.
0030 fc 33 fc 36 00 00 63 61 74 65 64 53 75 62 6a 65 .3.6..ca tedSubje
0040 63 74 74 00 1d 4c 6a 61 76 61 78 2f 73 65 63 75 ctt..Lja vax/secu
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0060 74 3b 4c 00 0a 69 64 65 6e 74 69 74 69 65 73 74 t;L..ide ntitiest
0070 00 0f 4c 6a 61 76 61 2f 75 74 69 6c 2f 53 65 74 ..Ljava/ util/Set
0080 3b 4c 00 05 72 6f 6c 65 73 74 00 27 4c 6f 72 67 ;L..role st.'Lorg
0090 2f 6a 62 6f 73 73 2f 73 65 63 75 72 69 74 79 2f /jboss/s ecurity/
00a0 69 64 65 6e 74 69 74 79 2f 52 6f 6c 65 47 72 6f identity /RoleGro
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11 years, 6 months
[jBPM] - Re: [Jbpm5]how to get the image showing the current status of a workflow
by Amit Joshi
Amit Joshi [https://community.jboss.org/people/mailamitjoshi] created the discussion
"Re: [Jbpm5]how to get the image showing the current status of a workflow"
To view the discussion, visit: https://community.jboss.org/message/749800#749800
--------------------------------------------------------------
Hi,
Many thanks for your reply. I am trying the solution mentioned by you but I end up with the following exception:
org.jbpm.api.JbpmException: resource jbpm.cfg.xml does not exist
at org.jbpm.pvm.internal.stream.ResourceStreamInput.openStream(ResourceStreamInput.java:60)
at org.jbpm.pvm.internal.xml.Parse.getInputSource(Parse.java:146)
at org.jbpm.pvm.internal.xml.Parser.buildDocument(Parser.java:453)
at org.jbpm.pvm.internal.xml.Parser.execute(Parser.java:425)
at org.jbpm.pvm.internal.xml.Parse.execute(Parse.java:158)
at org.jbpm.pvm.internal.cfg.ConfigurationImpl.parse(ConfigurationImpl.java:137)
at org.jbpm.pvm.internal.cfg.ConfigurationImpl.setResource(ConfigurationImpl.java:116)
at org.jbpm.pvm.internal.cfg.ConfigurationImpl.setResource(ConfigurationImpl.java:50)
at org.jbpm.api.Configuration.setResource(Configuration.java:79)
at org.jbpm.api.Configuration.getProcessEngine(Configuration.java:126)
Is the missing file required in jbpm 5? Any workaround?
Thanks and regards,
Amit
--------------------------------------------------------------
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11 years, 6 months
[JBoss Microcontainer] - How to re-compile a class loader
by lavot
lavot [https://community.jboss.org/people/lavot] created the discussion
"How to re-compile a class loader"
To view the discussion, visit: https://community.jboss.org/message/746164#746164
--------------------------------------------------------------
Hi,
I'm completely new here. I've been requested to help to improve perf on a project that runs under jboss 5.1.0.
We've done a jstack and most of the threads that run our code are blocked in the class loader in loadClass(). I've downloaded 2.09.GA jar of the class loader which seemed to improve a little the perf but now most of the threads are blocked in doLoad().
I've activated the traces for BaseClassLoader to try to understand which classes are loaded as after a few minutes of execution, I would have expected that all the classes would have been already loaded.
And that seems to be true as far as I saw:
2012-07-03 14:21:46,429 [WorkManager(2)-3] TRACE org.jboss.classloader.spi.base.BaseClassLoader - BaseClassLoader@c9447{vfszip:/opt/ESG/absapp/jboss-5.1.0.GA/server/prime/deploy/prime-cap-sms-ejb.jar/} loadClass ...capabilities.common.adapter.CapOutgoingAdapterApi resolve=false
2012-07-03 14:21:46,431 [WorkManager(2)-3] TRACE org.jboss.classloader.spi.base.BaseClassLoader - BaseClassLoader@c9447{vfszip:/opt/ESG/absapp/jboss-5.1.0.GA/server/prime/deploy/prime-cap-sms-ejb.jar/} already loaded class interface ...capabilities.common.adapter.CapOutgoingAdapterApi{cl=BaseClassLoader@c9447{vfszip:/opt/ESG/absapp/jboss-5.1.0.GA/server/prime/deploy/prime-cap-sms-ejb.jar/} codeSource=(jar:file:/opt/ESG/absapp/jboss-5.1.0.GA/server/prime/deploy/prime-cap-sms-ejb.jar!/ <no signer certificates>)}
Therefore, I don't understand why my class loader goes to doLoad() and then there gets blocked on the synchronize.
So, after that long introduction, here is my point. I'd like to understand better what is done in the class loader. So, I've decided to recompile a class loader with more traces but I failed. Could someone help me ?
I checked out the code:
c:\Program Files (x86)\Apache-Subversion-1.7.5\bin\svn.exe" co http://anonsvn.jboss.org/repos/jbossas/projects/jboss-cl/tags/2.0.9.GA http://anonsvn.jboss.org/repos/jbossas/projects/jboss-cl/tags/2.0.9.GA 2.0.9.GA
And tried to compile:
mvn clean install
And got what I didn't understand:
[INFO] Scanning for projects...
[INFO] Reactor build order:
[INFO] JBoss ClassLoader Parent POM
[INFO] JBoss ClassLoader
[INFO] JBoss ClassLoading
[INFO] JBoss ClassLoading VFS
[INFO] JBoss ClassLoader Distribution Build
[INFO] ------------------------------------------------------------------------
[INFO] Building JBoss ClassLoader Parent POM
[INFO] task-segment: [clean, install]
[INFO] ------------------------------------------------------------------------
[INFO] [clean:clean {execution: default-clean}]
[INFO] [enforcer:enforce {execution: enforce-plugin-versions}]
[INFO] [enforcer:enforce {execution: enforce-java-version}]
[INFO] [enforcer:enforce {execution: enforce-maven-version}]
[INFO] [site:attach-descriptor {execution: default-attach-descriptor}]
[INFO] [source:jar-no-fork {execution: attach-sources}]
[INFO] [install:install {execution: default-install}]
[INFO] Installing C:\Users\Lionel\Documents\Dev\JBOSS_CL\2.
0.9.GA\pom.xml to C:\Users\Lionel\Documents\M2_REPO\reposit
ory\org\jboss\cl\jboss-cl\2.0.9.GA\jboss-cl-2.0.9.GA.pom
[INFO] ------------------------------------------------------------------------
[INFO] Building JBoss ClassLoader
[INFO] task-segment: [clean, install]
[INFO] ------------------------------------------------------------------------
[INFO] [clean:clean {execution: default-clean}]
[INFO] Deleting file set: C:\Users\Lionel\Documents\Dev\JBO
SS_CL\2.0.9.GA\classloader\target (included: [**], excluded: [])
[INFO] [enforcer:enforce {execution: enforce-plugin-versions}]
[INFO] [enforcer:enforce {execution: enforce-java-version}]
[INFO] [enforcer:enforce {execution: enforce-maven-version}]
[INFO] [resources:resources {execution: default-resources}]
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Users\Lionel\Documents\
Dev\JBOSS_CL\2.0.9.GA\classloader\src\main\resources
[INFO] [compiler:compile {execution: default-compile}]
[INFO] Compiling 52 source files to C:\Users\Lionel\Documents\
Dev\JBOSS_CL\2.0.9.GA\classloader\target\classes
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Compilation failure
could not parse error message: warning: [options] bootstrap class path not set i
n conjunction with -source 1.5
C:\Users\Lionel\Documents\Dev\JBOSS_CL\2.0.9.GA\classloader
\src\main\java\org\jboss\classloader\spi\base\BaseClassLoader.java:115: warning:
[deprecation] isDebugEnabled() in Logger has been deprecated
if (log.isDebugEnabled())
^
C:\Users\Lionel\DocumentsDev\JBOSS_CL\2.0.9.GA\classloader
\src\main\java\org\jboss\classloader\test\support\IsolatedClassLoaderTest.java:[
61,22] error: name clash: suite(Class<?>) in IsolatedClassLoaderTest and suite(C
lass) in AbstractTestCaseWithSetup have the same erasure, yet neither hides the
other
[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5 seconds
[INFO] Finished at: Wed Jul 04 21:02:32 CEST 2012
[INFO] Final Memory: 32M/342M
[INFO] ------------------------------------------------------------------------
Thanks for help.
Lionel
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11 years, 7 months