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From Nick Stolwijk <nick_stolw...@planet.nl>
Subject Re: Deadlock in DatabasePersistenceManager
Date Fri, 25 May 2007 08:13:59 GMT
We've found the cause of our problem. Our database connection is being 
dropped by a firewall between the application server and the database 
server. That causes the database driver (oracle) to hang itself by not 
specifying a read time out on java.net.Socket.read. (This feature is 
implemented in a later version of the driver)

However, we also want to use a database pool instead of the one 
connection Jackrabbit uses. For this I'm looking into a one connection 
per session. Are there any known drawbacks in that scenario? Would this 
be a patch the jackrabbit community would be interested in?

With regards,

Nick Stolwijk


Marcel Reutegger wrote:
> Hi Nick,
>
> the three thread dumps do not show a deadlock.
>
> thread 20 executes a SQL statement in the persistence manager. threads 
> 19 and 21 wait until thread 20 returns from the call to Oracle.
>
> regards
>  marcel
>
> Nick Stolwijk wrote:
>> Has someone an idea in which direction we have to search this? Is it 
>> a bug in our usage, or maybe in jackrabbit?
>>
>> With regards,
>>
>> Nick Stolwijk
>>
>> Nick Stolwijk wrote:
>>> Sorry for the lack of information. I will try to draw a bigger picture.
>>>
>>> Our modification on the 1.2.1 tag consists of combining the Oracle 
>>> and JNDI classes to use them both. See [1] Patching the 
>>> OracleFileSystem and OraclePersistenceManager for use with JNDI.
>>>
>>> The stacktraces of the threaddump is as following:
>>>
>>> <"ExecuteThread: '21' for queue: 'weblogic.kernel.Default'" daemon 
>>> prio=1 tid=0x76888760 nid=0x569a waiting for monitor entry 
>>> [7574f000..7575187c]
>>> <    at 
>>> org.apache.jackrabbit.core.persistence.db.DatabasePersistenceManager.exists(DatabasePersistenceManager.java:645)

>>>
>>> <    - waiting to lock <0x8a7ae690> (a java.lang.String)
>>> <    at 
>>> org.apache.jackrabbit.core.state.SharedItemStateManager.hasNonVirtualItemState(SharedItemStateManager.java:1050)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.SharedItemStateManager.hasItemState(SharedItemStateManager.java:287)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.LocalItemStateManager.hasItemState(LocalItemStateManager.java:180)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.XAItemStateManager.hasItemState(XAItemStateManager.java:252)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.SessionItemStateManager.getItemState(SessionItemStateManager.java:163)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.getItemState(HierarchyManagerImpl.java:120)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:267)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:132)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:203)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:341)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:193)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.NodeImpl.resolveRelativeNodePath(NodeImpl.java:243)

>>>
>>> <    at org.apache.jackrabbit.core.NodeImpl.hasNode(NodeImpl.java:2507)
>>> <    at 
>>> nl.anwb.autoportaal.dao.jackrabbit.MediaRepositoryImpl$1.doInJcr(MediaRepositoryImpl.java:44)

>>>
>>> <    at org.springmodules.jcr.JcrTemplate.execute(JcrTemplate.java:76)
>>> <    at org.springmodules.jcr.JcrTemplate.execute(JcrTemplate.java:108)
>>> <    at 
>>> nl.anwb.autoportaal.dao.jackrabbit.MediaRepositoryImpl.getMedia(MediaRepositoryImpl.java:40)

>>>
>>> <    at 
>>> nl.anwb.autoportaal.facade.impl.CommonContextFacadeImpl.getMedia(CommonContextFacadeImpl.java:117)

>>>
>>> <    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> <    at 
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

>>>
>>> <    at 
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

>>>
>>> <    at java.lang.reflect.Method.invoke(Method.java:324)
>>> <    at 
>>> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:280)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:187)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:154)

>>>
>>> <    at 
>>> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)

>>>
>>> <    at 
>>> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:210)

>>>
>>> <    at $Proxy19.getMedia(Unknown Source)
>>> <    at 
>>> nl.anwb.autoportaal.web.search.ModelTekstSearchBean.getModelTekst(ModelTekstSearchBean.java:39)

>>>
>>> <    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> <    at 
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

>>>
>>> <    at 
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

>>>
>>> <    at java.lang.reflect.Method.invoke(Method.java:324)
>>> <    at 
>>> org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:438)

>>>
>>> <    at 
>>> org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:82)

>>>
>>> <    at 
>>> com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:141)

>>>
>>> <    at com.sun.el.parser.AstValue.getValue(AstValue.java:96)
>>> <    at 
>>> com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:183)
>>> <    at 
>>> com.sun.facelets.el.ELText$ELTextVariable.writeText(ELText.java:184)
>>> <    at 
>>> com.sun.facelets.compiler.TextInstruction.write(TextInstruction.java:45) 
>>>
>>> <    at 
>>> com.sun.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:39)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:232)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:580) 
>>>
>>> <    at 
>>> org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:101)

>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:222)

>>>
>>> <    at 
>>> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) 
>>>
>>> <    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
>>> <    at 
>>> weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)

>>>
>>> <    at 
>>> weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)

>>>
>>> <    at 
>>> weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:75)

>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:213)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)

>>>
>>> <    at 
>>> com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)

>>>
>>> <    at 
>>> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:264)

>>>
>>> <    at 
>>> org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)

>>>
>>> <    at 
>>> org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:110)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:217)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:191)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:148) 
>>>
>>> <    at 
>>> org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:90)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:61)

>>>
>>> <    at 
>>> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> nl.anwb.autoportaal.web.filters.SessionExpireFilter.doFilter(SessionExpireFilter.java:74)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6724)

>>>
>>> <    at 
>>> weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)

>>>
>>> <    at 
>>> weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) 
>>>
>>> <    at 
>>> weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)

>>>
>>> <    at 
>>> weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)

>>>
>>> <    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
>>> <    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
>>>
>>> <"ExecuteThread: '20' for queue: 'weblogic.kernel.Default'" daemon 
>>> prio=1 tid=0x76887c10 nid=0x569a runnable [757d0000..757d287c]
>>> <    at java.net.SocketInputStream.socketRead0(Native Method)
>>> <    at java.net.SocketInputStream.read(SocketInputStream.java:129)
>>> <    at oracle.net.ns.Packet.receive(Unknown Source)
>>> <    at oracle.net.ns.DataPacket.receive(Unknown Source)
>>> <    at oracle.net.ns.NetInputStream.getNextPacket(Unknown Source)
>>> <    at oracle.net.ns.NetInputStream.read(Unknown Source)
>>> <    at oracle.net.ns.NetInputStream.read(Unknown Source)
>>> <    at oracle.net.ns.NetInputStream.read(Unknown Source)
>>> <    at 
>>> oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:971)
>>> <    at 
>>> oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:941)
>>> <    at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:432)
>>> <    at 
>>> oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:181)

>>>
>>> <    at 
>>> oracle.jdbc.driver.T4CPreparedStatement.execute_for_rows(T4CPreparedStatement.java:543)

>>>
>>> <    at 
>>> oracle.jdbc.driver.OracleStatement.execute_maybe_describe(OracleStatement.java:913)

>>>
>>> <    at 
>>> oracle.jdbc.driver.T4CPreparedStatement.execute_maybe_describe(T4CPreparedStatement.java:452)

>>>
>>> <    at 
>>> oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:984)

>>>
>>> <    at 
>>> oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:2885)

>>>
>>> <    at 
>>> oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:2976)

>>>
>>> <    - locked <0x8a7da210> (a oracle.jdbc.driver.T4CPreparedStatement)
>>> <    - locked <0x8a7b5ba8> (a oracle.jdbc.driver.T4CConnection)
>>> <    at 
>>> weblogic.jdbc.wrapper.PreparedStatement.execute(PreparedStatement.java:102) 
>>>
>>> <    at 
>>> weblogic.jdbc.wrapper.PreparedStatement_oracle_jdbc_driver_T4CPreparedStatement.execute(Unknown

>>> Source)
>>> <    at 
>>> org.apache.jackrabbit.core.persistence.db.DatabasePersistenceManager.executeStmt(DatabasePersistenceManager.java:835)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.persistence.db.DatabasePersistenceManager.exists(DatabasePersistenceManager.java:647)

>>>
>>> <    - locked <0x8a7ae690> (a java.lang.String)
>>> <    at 
>>> org.apache.jackrabbit.core.state.SharedItemStateManager.hasNonVirtualItemState(SharedItemStateManager.java:1050)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.SharedItemStateManager.hasItemState(SharedItemStateManager.java:287)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.LocalItemStateManager.hasItemState(LocalItemStateManager.java:180)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.XAItemStateManager.hasItemState(XAItemStateManager.java:252)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.SessionItemStateManager.getItemState(SessionItemStateManager.java:163)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.getItemState(HierarchyManagerImpl.java:120)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:267)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:132)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:203)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:341)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:193)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.NodeImpl.resolveRelativeNodePath(NodeImpl.java:243)

>>>
>>> <    at org.apache.jackrabbit.core.NodeImpl.hasNode(NodeImpl.java:2507)
>>> <    at 
>>> nl.anwb.autoportaal.dao.jackrabbit.MediaRepositoryImpl$1.doInJcr(MediaRepositoryImpl.java:44)

>>>
>>> <    at org.springmodules.jcr.JcrTemplate.execute(JcrTemplate.java:76)
>>> <    at org.springmodules.jcr.JcrTemplate.execute(JcrTemplate.java:108)
>>> <    at 
>>> nl.anwb.autoportaal.dao.jackrabbit.MediaRepositoryImpl.getMedia(MediaRepositoryImpl.java:40)

>>>
>>> <    at 
>>> nl.anwb.autoportaal.facade.impl.CommonContextFacadeImpl.getMedia(CommonContextFacadeImpl.java:117)

>>>
>>> <    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> <    at 
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

>>>
>>> <    at 
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

>>>
>>> <    at java.lang.reflect.Method.invoke(Method.java:324)
>>> <    at 
>>> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:280)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:187)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:154)

>>>
>>> <    at 
>>> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)

>>>
>>> <    at 
>>> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:210)

>>>
>>> <    at $Proxy19.getMedia(Unknown Source)
>>> <    at 
>>> nl.anwb.autoportaal.web.search.ModelTekstSearchBean.getModelTekst(ModelTekstSearchBean.java:39)

>>>
>>> <    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> <    at 
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

>>>
>>> <    at 
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

>>>
>>> <    at java.lang.reflect.Method.invoke(Method.java:324)
>>> <    at 
>>> org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:438)

>>>
>>> <    at 
>>> org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:82)

>>>
>>> <    at 
>>> com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:141)

>>>
>>> <    at com.sun.el.parser.AstValue.getValue(AstValue.java:96)
>>> <    at 
>>> com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:183)
>>> <    at 
>>> com.sun.facelets.el.ELText$ELTextVariable.writeText(ELText.java:184)
>>> <    at 
>>> com.sun.facelets.compiler.TextInstruction.write(TextInstruction.java:45) 
>>>
>>> <    at 
>>> com.sun.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:39)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:232)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:580) 
>>>
>>> <    at 
>>> org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:101)

>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:222)

>>>
>>> <    at 
>>> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) 
>>>
>>> <    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
>>> <    at 
>>> weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)

>>>
>>> <    at 
>>> weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)

>>>
>>> <    at 
>>> weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:75)

>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:213)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)

>>>
>>> <    at 
>>> com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)

>>>
>>> <    at 
>>> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:264)

>>>
>>> <    at 
>>> org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)

>>>
>>> <    at 
>>> org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:110)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:217)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:191)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:148) 
>>>
>>> <    at 
>>> org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:90)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:61)

>>>
>>> <    at 
>>> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> nl.anwb.autoportaal.web.filters.SessionExpireFilter.doFilter(SessionExpireFilter.java:74)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6724)

>>>
>>> <    at 
>>> weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)

>>>
>>> <    at 
>>> weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) 
>>>
>>> <    at 
>>> weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)

>>>
>>> <    at 
>>> weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)

>>>
>>> <    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
>>> <    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
>>>
>>>
>>> <"ExecuteThread: '19' for queue: 'weblogic.kernel.Default'" daemon 
>>> prio=1 tid=0x768870c0 nid=0x569a waiting for monitor entry 
>>> [75851000..7585387c]
>>> <    at 
>>> org.apache.jackrabbit.core.persistence.db.DatabasePersistenceManager.exists(DatabasePersistenceManager.java:645)

>>>
>>> <    - waiting to lock <0x8a7ae690> (a java.lang.String)
>>> <    at 
>>> org.apache.jackrabbit.core.state.SharedItemStateManager.hasNonVirtualItemState(SharedItemStateManager.java:1050)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.SharedItemStateManager.hasItemState(SharedItemStateManager.java:287)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.LocalItemStateManager.hasItemState(LocalItemStateManager.java:180)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.XAItemStateManager.hasItemState(XAItemStateManager.java:252)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.state.SessionItemStateManager.getItemState(SessionItemStateManager.java:163)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.getItemState(HierarchyManagerImpl.java:120)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:267)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:132)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:203)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:341)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:193)

>>>
>>> <    at 
>>> org.apache.jackrabbit.core.NodeImpl.resolveRelativeNodePath(NodeImpl.java:243)

>>>
>>> <    at org.apache.jackrabbit.core.NodeImpl.hasNode(NodeImpl.java:2507)
>>> <    at 
>>> nl.anwb.autoportaal.dao.jackrabbit.MediaRepositoryImpl$1.doInJcr(MediaRepositoryImpl.java:44)

>>>
>>> <    at org.springmodules.jcr.JcrTemplate.execute(JcrTemplate.java:76)
>>> <    at org.springmodules.jcr.JcrTemplate.execute(JcrTemplate.java:108)
>>> <    at 
>>> nl.anwb.autoportaal.dao.jackrabbit.MediaRepositoryImpl.getMedia(MediaRepositoryImpl.java:40)

>>>
>>> <    at 
>>> nl.anwb.autoportaal.facade.impl.CommonContextFacadeImpl.getMedia(CommonContextFacadeImpl.java:117)

>>>
>>> <    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> <    at 
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

>>>
>>> <    at 
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

>>>
>>> <    at java.lang.reflect.Method.invoke(Method.java:324)
>>> <    at 
>>> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:280)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:187)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:154)

>>>
>>> <    at 
>>> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107)

>>>
>>> <    at 
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)

>>>
>>> <    at 
>>> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:210)

>>>
>>> <    at $Proxy19.getMedia(Unknown Source)
>>> <    at 
>>> nl.anwb.autoportaal.web.search.ModelTekstSearchBean.getModelTekst(ModelTekstSearchBean.java:39)

>>>
>>> <    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> <    at 
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

>>>
>>> <    at 
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

>>>
>>> <    at java.lang.reflect.Method.invoke(Method.java:324)
>>> <    at 
>>> org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:438)

>>>
>>> <    at 
>>> org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:82)

>>>
>>> <    at 
>>> com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:141)

>>>
>>> <    at com.sun.el.parser.AstValue.getValue(AstValue.java:96)
>>> <    at 
>>> com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:183)
>>> <    at 
>>> com.sun.facelets.el.ELText$ELTextVariable.writeText(ELText.java:184)
>>> <    at 
>>> com.sun.facelets.compiler.TextInstruction.write(TextInstruction.java:45) 
>>>
>>> <    at 
>>> com.sun.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:39)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:232)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:239)

>>>
>>> <    at 
>>> com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:580) 
>>>
>>> <    at 
>>> org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:101)

>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:222)

>>>
>>> <    at 
>>> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) 
>>>
>>> <    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
>>> <    at 
>>> weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)

>>>
>>> <    at 
>>> weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)

>>>
>>> <    at 
>>> weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:75)

>>>
>>> <    at 
>>> org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:213)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)

>>>
>>> <    at 
>>> com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)

>>>
>>> <    at 
>>> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:264)

>>>
>>> <    at 
>>> org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)

>>>
>>> <    at 
>>> org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:110)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:217)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:191)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:274)

>>>
>>> <    at 
>>> org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:148) 
>>>
>>> <    at 
>>> org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:90)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:61)

>>>
>>> <    at 
>>> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> nl.anwb.autoportaal.web.filters.SessionExpireFilter.doFilter(SessionExpireFilter.java:74)

>>>
>>> <    at 
>>> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27) 
>>>
>>> <    at 
>>> weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6724)

>>>
>>> <    at 
>>> weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)

>>>
>>> <    at 
>>> weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) 
>>>
>>> <    at 
>>> weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)

>>>
>>> <    at 
>>> weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)

>>>
>>> <    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
>>> <    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
>>>
>>>
>>> We first used jackrabbit to only query existing nodes. A while ago 
>>> we also started to query non-existing nodes (Files with text) The 
>>> method 
>>> nl.anwb.autoportaal.web.search.ModelTekstSearchBean.getModelTekst(ModelTekstSearchBean.java:39

>>> is used for this.
>>>
>>> It is hard to test, because the only place we have been able to 
>>> reproduce this is the acceptance server at our customers site.
>>>
>>> I hope this is enough information. If not, please ask.
>>>
>>> Nick Stolwijk
>>>
>>> [1] http://wiki.apache.org/jackrabbit/ExamplesPage
>>>
>>> Stefan Guggisberg wrote:
>>>> hi nick,
>>>>
>>>> On 5/21/07, Nick Stolwijk <nick_stolwijk@planet.nl> wrote:
>>>>> We have a problem with a deadlock in Jackrabbit. We are using version
>>>>> 1.2.1 with some modifications to use a Oracle connection through 
>>>>> JNDI.
>>>>>
>>>>> Now we have a deadlock in the DatabasePersistenceManager. Can someone
>>>>> explain to me what we're doing wrong.
>>>>
>>>> well that's going to be very difficult without knowing what exactly
>>>> you're doing
>>>> and what exactly your modifcations consist of ;) we'd also need a 
>>>> jvm thread
>>>> dump including all threads involved in the dead lock.
>>>>
>>>> btw: are you also experiencing dead locks with an out-of-the-box 
>>>> jackrabbit
>>>> release?
>>>>
>>>> cheers
>>>> stefan
>>>>
>>>>>
>>>>> Stacktrace:
>>>>>
>>>>> "ExecuteThread: '21' for queue: 'weblogic.kernel.Default'" daemon 
>>>>> prio=1 tid=0x76888760 nid=0x569a waiting for monitor entry 
>>>>> [7574f000..7575187c]
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.persistence.db.DatabasePersistenceManager.exists(DatabasePersistenceManager.java:645)

>>>>>
>>>>> <       - waiting to lock <0x8a7ae690> (a java.lang.String)
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.state.SharedItemStateManager.hasNonVirtualItemState(SharedItemStateManager.java:1050)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.state.SharedItemStateManager.hasItemState(SharedItemStateManager.java:287)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.state.LocalItemStateManager.hasItemState(LocalItemStateManager.java:180)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.state.XAItemStateManager.hasItemState(XAItemStateManager.java:252)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.state.SessionItemStateManager.getItemState(SessionItemStateManager.java:163)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.HierarchyManagerImpl.getItemState(HierarchyManagerImpl.java:120)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:267)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:132)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:203)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.HierarchyManagerImpl.resolvePath(HierarchyManagerImpl.java:341)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.CachingHierarchyManager.resolvePath(CachingHierarchyManager.java:193)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.NodeImpl.resolveRelativeNodePath(NodeImpl.java:243)

>>>>>
>>>>> <       at 
>>>>> org.apache.jackrabbit.core.NodeImpl.hasNode(NodeImpl.java:2507)
>>>>> <       at 
>>>>> nl.anwb.autoportaal.dao.jackrabbit.MediaRepositoryImpl$1.doInJcr(MediaRepositoryImpl.java:44)

>>>>>
>>>>> <       at 
>>>>> org.springmodules.jcr.JcrTemplate.execute(JcrTemplate.java:76)
>>>>> <       at 
>>>>> org.springmodules.jcr.JcrTemplate.execute(JcrTemplate.java:108)
>>>>> <       at 
>>>>> nl.anwb.autoportaal.dao.jackrabbit.MediaRepositoryImpl.getMedia(MediaRepositoryImpl.java:40)

>>>>>
>>>>>
>>>>>
>>>>> Environment:
>>>>> Weblogic 8.1
>>>>> Oracle 9
>>>>> Weblogic connection pool with 15 connections
>>>>> Jackrabbit 1.2.1
>>>>>
>>>>> I hope someone can help me.
>>>>>
>>>>> Nick Stolwijk
>>>>>
>>>>>
>>>>
>>>
>>>
>>
>


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