[JBoss-dev] [ jboss-Bugs-662098 ] class loader deadlock new for 3.2Beta3

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 454-5900

Bugs item #662098, was opened at 2003-01-04 04:00
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=376685&aid=662098&group_id=22866

>Category: JBossMX
Group: v3.2
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Dorothy Gantenbein (dgantenbein)
>Assigned to: Scott M Stark (starksm)
Summary: class loader deadlock new for 3.2Beta3

Initial Comment:
Class loader deadlock occurs on Windows XP, 
Windows 2000 and Linus.  Using JDK 1.4.1_01 and 
JBoss 3.2 Beta3.  This was not a problem using JBoss 
3.2 Beta1.

For us, this deadlock occurs using Cactus' ant task to 
do automated nightly testing (runservertasks).  This ant 
task starts JBoss, and JBoss freezes during startup at 
various points.

At the bottom of this information is the information about 
the deadlock from OptimizeIt's thread debugger.  The 
stacktraces to the two threads involved in the deadlock 
are included (tcpConnection-8080-1 and main).  For 
tcpConnection-8080-1 thread, the resin classes appear 
in the stacktrace.  I have confirmed that the resin 
classes shown in the stacktrace are NOT holding any 
monitor on a class.

------------------------------------------------------------
Thread tcpConnection-8080-1 enters monitor 
java.lang.Class 0xaf35760 first and then 
org.jboss.mx.loading.UnifiedClassLoader3 0xb124f80 
while thread main enters in opposite order.

Thread [tcpConnection-8080-1] (Suspended)
	java.lang.Object.wait(long) line: not available 
[native method]
	org.jboss.mx.loading.ClassLoadingTask
(java.lang.Object).wait() line: 426
	org.jboss.mx.loading.UnifiedClassLoader3.loa
dClass(java.lang.String, boolean) line: 175
	org.jboss.mx.loading.UnifiedClassLoader3
(java.lang.ClassLoader).loadClass(java.lang.String) line: 
262
	org.jboss.mx.loading.UnifiedClassLoader3
(java.lang.ClassLoader).loadClassInternal
(java.lang.String) line: 322
	java.lang.ClassLoader.defineClass0
(java.lang.String, byte[], int, int, 
java.security.ProtectionDomain) line: not available 
[native method]
	org.jboss.mx.loading.UnifiedClassLoader3
(java.lang.ClassLoader).defineClass(java.lang.String, 
byte[], int, int, java.security.ProtectionDomain) line: 509
	org.jboss.mx.loading.UnifiedClassLoader3
(java.security.SecureClassLoader).defineClass
(java.lang.String, byte[], int, int, 
java.security.CodeSource) line: 123
	org.jboss.mx.loading.UnifiedClassLoader3
(java.net.URLClassLoader).defineClass(java.lang.String, 
sun.misc.Resource) line: 246
	java.net.URLClassLoader.access$100
(java.net.URLClassLoader, java.lang.String, 
sun.misc.Resource) line: 54
	java.net.URLClassLoader$1.run() line: 193
	java.security.AccessController.doPrivileged
(java.security.PrivilegedExceptionAction, 
java.security.AccessControlContext) line: not available 
[native method]
	org.jboss.mx.loading.UnifiedClassLoader3
(java.net.URLClassLoader).findClass(java.lang.String) 
line: 186
	org.jboss.mx.loading.UnifiedClassLoader3
(org.jboss.mx.loading.UnifiedClassLoader).findClass
(java.lang.String) line: 444
	org.jboss.mx.loading.UnifiedClassLoader3
(java.lang.ClassLoader).loadClass(java.lang.String, 
boolean) line: 306
	org.jboss.mx.loading.UnifiedClassLoader3
(org.jboss.mx.loading.UnifiedClassLoader).loadClassLoc
ally(java.lang.String, boolean) line: 250
	org.jboss.mx.loading.UnifiedLoaderRepository
3.loadClassFromClassLoader(java.lang.String, boolean, 
org.jboss.mx.loading.UnifiedClassLoader) line: 187
	org.jboss.mx.loading.LoadMgr.beginLoadTas
k(org.jboss.mx.loading.ClassLoadingTask, 
org.jboss.mx.loading.UnifiedLoaderRepository3) line: 119
	org.jboss.mx.loading.UnifiedClassLoader3.loa
dClass(java.lang.String, boolean) line: 161
	org.jboss.mx.loading.UnifiedClassLoader3
(java.lang.ClassLoader).loadClass(java.lang.String) line: 
262
	org.jboss.mx.loading.UnifiedClassLoader3
(java.lang.ClassLoader).loadClassInternal
(java.lang.String) line: 322
	com.caucho.jsp.JspParser.parse
(com.caucho.vfs.ReadStream, java.lang.String, 
java.lang.String, java.lang.String, com.caucho.vfs.Path, 
com.caucho.server.http.CauchoRequest, 
com.caucho.server.http.CauchoApplication) line: 282
	com.caucho.jsp.JspParser.parse
(com.caucho.vfs.ReadStream, com.caucho.vfs.Path, 
java.lang.String, java.lang.String, java.lang.String, 
com.caucho.server.http.CauchoRequest, 
com.caucho.server.http.CauchoApplication, 
com.caucho.java.LineMap, boolean, java.util.ArrayList) 
line: 258
	com.caucho.jsp.XtpPage.getJspPage
(com.caucho.xml.CauchoDocument, 
javax.xml.transform.Templates, 
com.caucho.server.http.CauchoRequest, 
com.caucho.server.http.CauchoResponse, 
java.lang.String) line: 602
	com.caucho.jsp.XtpPage.compileJspPage
(com.caucho.server.http.CauchoRequest, 
com.caucho.server.http.CauchoResponse, 
com.caucho.xml.CauchoDocument, 
javax.xml.transform.Templates, java.lang.String) line: 
388
	com.caucho.jsp.XtpPage.service
(javax.servlet.ServletRequest, 
javax.servlet.ServletResponse) line: 234
	com.caucho.jsp.XtpPage
(com.caucho.jsp.Page).subservice
(com.caucho.server.http.CauchoRequest, 
com.caucho.server.http.CauchoResponse) line: 497
	com.caucho.server.http.FilterChainPage.doFil
ter(javax.servlet.ServletRequest, 
javax.servlet.ServletResponse) line: 182
	com.caucho.server.http.CacheInvocation
(com.caucho.server.http.Invocation).service
(com.caucho.server.http.AbstractRequest, 
com.caucho.server.http.CauchoResponse) line: 312
	com.caucho.server.http.CacheInvocation.servi
ce(com.caucho.server.http.AbstractRequest, 
com.caucho.server.http.CauchoResponse) line: 135
	com.caucho.server.http.HttpRequest.handleR
equest() line: 244
	com.caucho.server.http.HttpRequest.handleC
onnection(com.caucho.server.Connection) line: 163
	com.caucho.server.TcpConnection.run() line: 
137
	java.lang.Thread.run() line: 536

Thread [main] (Suspended)
	org.jboss.mx.loading.LoadMgr.beginLoadTas
k(org.jboss.mx.loading.ClassLoadingTask, 
org.jboss.mx.loading.UnifiedLoaderRepository3) line: 106
	org.jboss.mx.loading.UnifiedClassLoader3.loa
dClass(java.lang.String, boolean) line: 161
	org.jboss.mx.loading.UnifiedClassLoader3
(java.lang.ClassLoader).loadClass(java.lang.String) line: 
262
	org.jboss.mx.loading.UnifiedClassLoader3
(java.lang.ClassLoader).loadClassInternal
(java.lang.String) line: 322
	org.jboss.invocation.jrmp.server.JRMPInvoker.
startService() line: 274
	org.jboss.invocation.jrmp.server.JRMPInvoker
$1.startService() line: 102
	org.jboss.invocation.jrmp.server.JRMPInvoker
$1(org.jboss.system.ServiceMBeanSupport).start() line: 
197
	org.jboss.invocation.jrmp.server.JRMPInvoker.
start() line: 535
	sun.reflect.NativeMethodAccessorImpl.invoke
0(java.lang.reflect.Method, java.lang.Object, 
java.lang.Object[]) line: not available [native method]
	sun.reflect.NativeMethodAccessorImpl.invoke
(java.lang.Object, java.lang.Object[]) line: 39
	sun.reflect.DelegatingMethodAccessorImpl.in
voke(java.lang.Object, java.lang.Object[]) line: 25
	java.lang.reflect.Method.invoke
(java.lang.Object, java.lang.Object[]) line: 324
	org.jboss.mx.capability.ReflectedMBeanDisp
atcher.invoke(java.lang.String, java.lang.Object[], 
java.lang.String[]) line: 284
	org.jboss.mx.server.MBeanServerImpl.invoke
(javax.management.ObjectName, java.lang.String, 
java.lang.Object[], java.lang.String[]) line: 549
	org.jboss.system.ServiceController$ServicePr
oxy.invoke(java.lang.Object, java.lang.reflect.Method, 
java.lang.Object[]) line: 954
	$Proxy10.start() line: not available
	org.jboss.system.ServiceController.start
(javax.management.ObjectName) line: 388
	org.jboss.system.ServiceController.start
(javax.management.ObjectName) line: 404
	org.jboss.system.ServiceController.start
(javax.management.ObjectName) line: 404
	sun.reflect.GeneratedMethodAccessor6.invok
e(java.lang.Object, java.lang.Object[]) line: not available
	sun.reflect.DelegatingMethodAccessorImpl.in
voke(java.lang.Object, java.lang.Object[]) line: 25
	java.lang.reflect.Method.invoke
(java.lang.Object, java.lang.Object[]) line: 324
	org.jboss.mx.capability.ReflectedMBeanDisp
atcher.invoke(java.lang.String, java.lang.Object[], 
java.lang.String[]) line: 284
	org.jboss.mx.server.MBeanServerImpl.invoke
(javax.management.ObjectName, java.lang.String, 
java.lang.Object[], java.lang.String[]) line: 549
	org.jboss.util.jmx.MBeanProxy.invoke
(java.lang.Object, java.lang.reflect.Method, 
java.lang.Object[]) line: 174
	$Proxy5.start
(javax.management.ObjectName) line: not available
	org.jboss.deployment.SARDeployer.start
(org.jboss.deployment.DeploymentInfo) line: 310
	org.jboss.deployment.MainDeployer.start
(org.jboss.deployment.DeploymentInfo) line: 824
	org.jboss.deployment.MainDeployer.deploy
(org.jboss.deployment.DeploymentInfo) line: 636
	org.jboss.deployment.MainDeployer.deploy
(java.net.URL) line: 600
	sun.reflect.GeneratedMethodAccessor21.invo
ke(java.lang.Object, java.lang.Object[]) line: not available
	sun.reflect.DelegatingMethodAccessorImpl.in
voke(java.lang.Object, java.lang.Object[]) line: 25
	java.lang.reflect.Method.invoke
(java.lang.Object, java.lang.Object[]) line: 324
	org.jboss.mx.capability.ReflectedMBeanDisp
atcher.invoke(java.lang.String, java.lang.Object[], 
java.lang.String[]) line: 284
	org.jboss.mx.server.MBeanServerImpl.invoke
(javax.management.ObjectName, java.lang.String, 
java.lang.Object[], java.lang.String[]) line: 549
	org.jboss.util.jmx.MBeanProxy.invoke
(java.lang.Object, java.lang.reflect.Method, 
java.lang.Object[]) line: 174
	$Proxy7.deploy(java.net.URL) line: not 
available
	org.jboss.deployment.scanner.URLDeployme
ntScanner.deploy
(org.jboss.deployment.scanner.URLDeploymentScanner
$DeployedURL) line: 400
	org.jboss.deployment.scanner.URLDeployme
ntScanner.scanDirectory(java.net.URL) line: 619
	org.jboss.deployment.scanner.URLDeployme
ntScanner.scan() line: 472
	org.jboss.deployment.scanner.AbstractDeplo
ymentScanner$ScannerThread.doScan() line: 195
	org.jboss.deployment.scanner.URLDeployme
ntScanner
(org.jboss.deployment.scanner.AbstractDeploymentSca
nner).startService() line: 268
	org.jboss.deployment.scanner.URLDeployme
ntScanner
(org.jboss.system.ServiceMBeanSupport).start() line: 
197
	sun.reflect.GeneratedMethodAccessor7.invok
e(java.lang.Object, java.lang.Object[]) line: not available
	sun.reflect.DelegatingMethodAccessorImpl.in
voke(java.lang.Object, java.lang.Object[]) line: 25
	java.lang.reflect.Method.invoke
(java.lang.Object, java.lang.Object[]) line: 324
	org.jboss.mx.capability.ReflectedMBeanDisp
atcher.invoke(java.lang.String, java.lang.Object[], 
java.lang.String[]) line: 284
	org.jboss.mx.server.MBeanServerImpl.invoke
(javax.management.ObjectName, java.lang.String, 
java.lang.Object[], java.lang.String[]) line: 549
	org.jboss.system.ServiceController$ServicePr
oxy.invoke(java.lang.Object, java.lang.reflect.Method, 
java.lang.Object[]) line: 954
	$Proxy0.start() line: not available
	org.jboss.system.ServiceController.start
(javax.management.ObjectName) line: 388
	sun.reflect.GeneratedMethodAccessor6.invok
e(java.lang.Object, java.lang.Object[]) line: not available
	sun.reflect.DelegatingMethodAccessorImpl.in
voke(java.lang.Object, java.lang.Object[]) line: 25
	java.lang.reflect.Method.invoke
(java.lang.Object, java.lang.Object[]) line: 324
	org.jboss.mx.capability.ReflectedMBeanDisp
atcher.invoke(java.lang.String, java.lang.Object[], 
java.lang.String[]) line: 284
	org.jboss.mx.server.MBeanServerImpl.invoke
(javax.management.ObjectName, java.lang.String, 
java.lang.Object[], java.lang.String[]) line: 549
	org.jboss.util.jmx.MBeanProxy.invoke
(java.lang.Object, java.lang.reflect.Method, 
java.lang.Object[]) line: 174
	$Proxy5.start
(javax.management.ObjectName) line: not available
	org.jboss.deployment.SARDeployer.start
(org.jboss.deployment.DeploymentInfo) line: 310
	org.jboss.deployment.MainDeployer.start
(org.jboss.deployment.DeploymentInfo) line: 824
	org.jboss.deployment.MainDeployer.deploy
(org.jboss.deployment.DeploymentInfo) line: 636
	org.jboss.deployment.MainDeployer.deploy
(java.net.URL) line: 600
	org.jboss.deployment.MainDeployer.deploy
(java.lang.String) line: 584
	sun.reflect.NativeMethodAccessorImpl.invoke
0(java.lang.reflect.Method, java.lang.Object, 
java.lang.Object[]) line: not available [native method]
	sun.reflect.NativeMethodAccessorImpl.invoke
(java.lang.Object, java.lang.Object[]) line: 39
	sun.reflect.DelegatingMethodAccessorImpl.in
voke(java.lang.Object, java.lang.Object[]) line: 25
	java.lang.reflect.Method.invoke
(java.lang.Object, java.lang.Object[]) line: 324
	org.jboss.mx.capability.ReflectedMBeanDisp
atcher.invoke(java.lang.String, java.lang.Object[], 
java.lang.String[]) line: 284
	org.jboss.mx.server.MBeanServerImpl.invoke
(javax.management.ObjectName, java.lang.String, 
java.lang.Object[], java.lang.String[]) line: 549
	org.jboss.util.jmx.MBeanProxy.invoke
(java.lang.Object, java.lang.reflect.Method, 
java.lang.Object[]) line: 174
	$Proxy6.deploy(java.lang.String) line: not 
available
	org.jboss.system.server.ServerImpl.doStart() 
line: 325
	org.jboss.system.server.ServerImpl.start() 
line: 232
	org.jboss.Main.boot(java.lang.String[]) line: 
155
	org.jboss.Main$1.run() line: 393
	java.lang.Thread.run() line: 536

----------------------------------------------------------------------

>Comment By: Scott M Stark (starksm)
Date: 2003-01-04 20:53

Message:
Logged In: YES 
user_id=175228

This has been fixed in the current 3.2 branch.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=376685&aid=662098&group_id=22866