[
https://issues.apache.org/jira/browse/FELIX-3067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14217602#comment-14217602
]
metatech commented on FELIX-3067:
---------------------------------
Here is yet another example of deadlock, this time between JAXB and Felix
{code}
"SpringOsgiExtenderThread-1" prio=6 tid=0x0000000013398000 nid=0x1f98 in
Object.wait() [0x000000001824c000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000c0390188> (a [Ljava.lang.Object;)
---> trying the acquire the Felix global lock
at org.apache.felix.framework.Felix.acquireGlobalLock(Felix.java:5044)
- locked <0x00000000c0390188> (a [Ljava.lang.Object;)
at org.apache.felix.framework.Felix.access$600(Felix.java:80)
at
org.apache.felix.framework.Felix$StatefulResolver.resolve(Felix.java:4204)
at
org.apache.felix.framework.ModuleImpl.searchDynamicImports(ModuleImpl.java:1448)
at
org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:759)
at org.apache.felix.framework.ModuleImpl.access$400(ModuleImpl.java:72)
at
org.apache.felix.framework.ModuleImpl$ModuleClassLoader.loadClass(ModuleImpl.java:1807)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at
com.sun.xml.bind.v2.runtime.reflect.opt.Injector.<init>(Injector.java:187)
at
com.sun.xml.bind.v2.runtime.reflect.opt.Injector.get(Injector.java:125)
at
com.sun.xml.bind.v2.runtime.reflect.opt.Injector.find(Injector.java:97)
at
com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector.prepare(AccessorInjector.java:79)
--> acquired a JAXB lock
- locked <0x00000000fe79df38> (a java.lang.Class for
com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector)
at
com.sun.xml.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.get(OptimizedAccessorFactory.java:167)
at
com.sun.xml.bind.v2.runtime.reflect.Accessor$FieldReflection.optimize(Accessor.java:279)
at
com.sun.xml.bind.v2.runtime.reflect.TransducedAccessor$CompositeTransducedAccessorImpl.<init>(TransducedAccessor.java:233)
at
com.sun.xml.bind.v2.runtime.reflect.TransducedAccessor.get(TransducedAccessor.java:173)
at
com.sun.xml.bind.v2.runtime.property.AttributeProperty.<init>(AttributeProperty.java:87)
at
com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:104)
at
com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:179)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:515)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:534)
at
com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.<init>(ArrayElementProperty.java:108)
at
com.sun.xml.bind.v2.runtime.property.ArrayElementNodeProperty.<init>(ArrayElementNodeProperty.java:58)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at
com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:124)
at
com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:179)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:515)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:330)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1140)
at
com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:154)
at
com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:121)
at
com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:202)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:143)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:310)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:412)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:375)
at
org.apache.camel.spring.handler.CamelNamespaceHandler.createJaxbContext(CamelNamespaceHandler.java:187)
at
org.apache.camel.spring.handler.CamelNamespaceHandler.getJaxbContext(CamelNamespaceHandler.java:174)
at
org.apache.camel.spring.handler.CamelNamespaceHandler$CamelContextBeanDefinitionParser.doParse(CamelNamespaceHandler.java:302)
at
org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser.parseInternal(AbstractSingleBeanDefinitionParser.java:85)
at
org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:59)
at
org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
at
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1338)
at
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1328)
at
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
at
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
at
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143)
at
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178)
at
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149)
at
org.springframework.osgi.context.support.OsgiBundleXmlApplicationContext.loadBeanDefinitions(OsgiBundleXmlApplicationContext.java:164)
at
org.springframework.osgi.context.support.OsgiBundleXmlApplicationContext.loadBeanDefinitions(OsgiBundleXmlApplicationContext.java:136)
at
org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
at
org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:467)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.access$800(AbstractDelegatedExecutionApplicationContext.java:69)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext$3.run(AbstractDelegatedExecutionApplicationContext.java:269)
- locked <0x00000000fe5009a0> (a java.lang.Object)
at
org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL(PrivilegedUtils.java:85)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.startRefresh(AbstractDelegatedExecutionApplicationContext.java:247)
at
org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor.stageOne(DependencyWaiterApplicationContextExecutor.java:214)
at
org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor.refresh(DependencyWaiterApplicationContextExecutor.java:169)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.refresh(AbstractDelegatedExecutionApplicationContext.java:175)
at
org.springframework.osgi.extender.internal.activator.ContextLoaderListener$2.run(ContextLoaderListener.java:716)
at java.lang.Thread.run(Thread.java:744)
"FelixStartLevel" daemon prio=6 tid=0x0000000008b0a800 nid=0x2a04 waiting for
monitor entry [0x0000000006f6c000]
java.lang.Thread.State: BLOCKED (on object monitor)
at
com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector.prepare(AccessorInjector.java:79)
--> trying to acquire a JAXB lock
- waiting to lock <0x00000000fe79df38> (a java.lang.Class for
com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector)
at
com.sun.xml.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.get(OptimizedAccessorFactory.java:167)
at
com.sun.xml.bind.v2.runtime.reflect.Accessor$FieldReflection.optimize(Accessor.java:279)
at
com.sun.xml.bind.v2.runtime.reflect.TransducedAccessor$CompositeTransducedAccessorImpl.<init>(TransducedAccessor.java:233)
at
com.sun.xml.bind.v2.runtime.reflect.TransducedAccessor.get(TransducedAccessor.java:173)
at
com.sun.xml.bind.v2.runtime.property.AttributeProperty.<init>(AttributeProperty.java:87)
at
com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:104)
at
com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:179)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:515)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:534)
at
com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.<init>(ArrayElementProperty.java:108)
at
com.sun.xml.bind.v2.runtime.property.ArrayElementNodeProperty.<init>(ArrayElementNodeProperty.java:58)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at
com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:124)
at
com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:179)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:515)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:330)
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1140)
at
com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:154)
at
com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:121)
at
com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:202)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:143)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:310)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:412)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:375)
at
org.apache.camel.blueprint.handler.CamelNamespaceHandler.createJaxbContext(CamelNamespaceHandler.java:519)
at
org.apache.camel.blueprint.handler.CamelNamespaceHandler.getJaxbContext(CamelNamespaceHandler.java:506)
at
org.apache.camel.blueprint.handler.CamelNamespaceHandler.parseCamelContextNode(CamelNamespaceHandler.java:185)
at
org.apache.camel.blueprint.handler.CamelNamespaceHandler.parse(CamelNamespaceHandler.java:149)
at
org.apache.aries.blueprint.container.Parser.parseCustomElement(Parser.java:1248)
at
org.apache.aries.blueprint.container.Parser.loadComponents(Parser.java:337)
at org.apache.aries.blueprint.container.Parser.populate(Parser.java:277)
at
org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:283)
at
org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:230)
- locked <0x00000000fea06670> (a
java.util.concurrent.atomic.AtomicBoolean)
- locked <0x00000000fea06660> (a
java.util.concurrent.atomic.AtomicBoolean)
at
org.apache.aries.blueprint.container.BlueprintExtender.checkBundle(BlueprintExtender.java:319)
at
org.apache.aries.blueprint.container.BlueprintExtender.bundleChanged(BlueprintExtender.java:239)
at
org.apache.aries.blueprint.container.BlueprintExtender$BlueprintBundleTrackerCustomizer.modifiedBundle(BlueprintExtender.java:438)
at
org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:453)
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:237)
at
org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:413)
at
org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:807)
at
org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:729)
at
org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:610)
at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:3906)
at org.apache.felix.framework.Felix.startBundle(Felix.java:1877)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1200)
--> acquired the Felix global lock
at
org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl.java:266)
at java.lang.Thread.run(Thread.java:744)
{code}
> Prevent Deadlock Situation in Felix.acquireGlobalLock
> -----------------------------------------------------
>
> Key: FELIX-3067
> URL: https://issues.apache.org/jira/browse/FELIX-3067
> Project: Felix
> Issue Type: Improvement
> Components: Framework
> Affects Versions: framework-3.0.7, framework-3.0.8, framework-3.0.9,
> framework-3.2.0, framework-3.2.1, fileinstall-3.1.10
> Reporter: Felix Meschberger
> Attachments: FELIX-3067-sling.patch, FELIX-3067.patch,
> felix_unblock_deadlock.patch, felix_unblock_deadlock_2.patch,
> felix_unblock_deadlock_v2.patch, threaddump-ise-deadlock.txt,
> threads_locked_by_camel_type_converter
>
>
> Every now and then we encounter deadlock situations which involve the
> Felix.acquireGlobalLock method. In our use case we have the following aspects
> which contribute to this:
> (a) The Apache Felix Declarative Services implementation stops components
> (and thus causes service unregistration) while the bundle lock is being held
> because this happens in a SynchronousBundleListener while handling the
> STOPPING bundle event. We have to do this to ensure the bundle is not really
> stopped yet to properly stop the bundle's components.
> (b) Implementing a special class loader which involves dynamically resolving
> packages which in turn uses the global lock
> (c) Eclipse Gemini Blueprint implementation which operates asynchronously
> (d) synchronization in application classes
> Often times, I would assume that we can self-heal such complex deadlck
> situations, if we let acquireGlobalLock time out. Looking at the calles of
> acquireGlobalLock there seems to already be provision to handle this case
> since acquireGlobalLock returns true only if the global lock has actually
> been acquired.
> This issue is kind of a companion to FELIX-3000 where deadlocks involve
> sending service registration events while holding the bundle lock.
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