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https://issues.apache.org/jira/browse/FELIX-5789?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Karl Pauls closed FELIX-5789.
-----------------------------
> Webconsole Memory Usage Plugin can cause deadlock
> -------------------------------------------------
>
> Key: FELIX-5789
> URL: https://issues.apache.org/jira/browse/FELIX-5789
> Project: Felix
> Issue Type: Bug
> Components: Web Console
> Affects Versions: webconsole-memoryusage-plugin-1.0.6
> Reporter: Karl Pauls
> Assignee: Karl Pauls
> Priority: Major
> Fix For: webconsole-memoryusage-plugin-1.0.8
>
>
> When the o.a.f.webconsole.plugins.memoryusage bundle is refreshed it is
> possible that it causes a deadlock because it has dynamic imports that are
> only triggered from inside a service factory callback that is synchronized.
> That can cause the following deadlock situation:
> {code:java}
> "CM Configuration Updater (ManagedService Update:
> pid=[org.apache.felix.webconsole.plugins.memoryusage.internal.MemoryUsageConfigurator])"
> #9822 daemon prio=5 os_prio=31 tid=0x00007fe7494c1800 nid=0x9607 in
> Object.wait() [0x0000700008f4c000]
> java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> at java.lang.Object.wait(Object.java:502)
> at org.apache.felix.framework.Felix.acquireGlobalLock(Felix.java:5366)
> - locked <0x00000006c0261148> (a [Ljava.lang.Object;)
> at
> org.apache.felix.framework.StatefulResolver.resolve(StatefulResolver.java:528)
> at
> org.apache.felix.framework.BundleWiringImpl.searchDynamicImports(BundleWiringImpl.java:1717)
> at
> org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1617)
> at
> org.apache.felix.framework.BundleWiringImpl.access$200(BundleWiringImpl.java:80)
> at
> org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:2053)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
> at
> org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.defineClass(BundleWiringImpl.java:2410)
> at
> org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2194)
> at
> org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1607)
> at
> org.apache.felix.framework.BundleWiringImpl.access$200(BundleWiringImpl.java:80)
> at
> org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:2053)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at
> org.apache.felix.webconsole.plugins.memoryusage.internal.Activator$3.createObject(Activator.java:72)
> at
> org.apache.felix.webconsole.plugins.memoryusage.internal.Activator$AbstractServiceFactory.getService(Activator.java:121)
> - locked <0x000000077ce19440> (a
> org.apache.felix.webconsole.plugins.memoryusage.internal.Activator$3)
> at
> org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:347)
> at
> org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:247)
> at
> org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:350)
> at org.apache.felix.framework.Felix.getService(Felix.java:3737)
> at
> org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:470)
> at
> org.apache.felix.cm.impl.helper.BaseTracker.getRealService(BaseTracker.java:207)
> at
> org.apache.felix.cm.impl.helper.ManagedServiceTracker.updateService(ManagedServiceTracker.java:102)
> at
> org.apache.felix.cm.impl.helper.ManagedServiceTracker.provideConfiguration(ManagedServiceTracker.java:85)
> at
> org.apache.felix.cm.impl.ConfigurationManager$ManagedServiceUpdate.provide(ConfigurationManager.java:1097)
> at
> org.apache.felix.cm.impl.ConfigurationManager$ManagedServiceUpdate.run(ConfigurationManager.java:1053)
> at org.apache.felix.cm.impl.UpdateThread.run0(UpdateThread.java:138)
> at org.apache.felix.cm.impl.UpdateThread.run(UpdateThread.java:105)
> at java.lang.Thread.run(Thread.java:745)
> "FelixFrameworkWiring" #21 daemon prio=5 os_prio=31 tid=0x00007fe7450eb000
> nid=0x6103 waiting for monitor entry [0x000070000790c000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at
> org.apache.felix.webconsole.plugins.memoryusage.internal.Activator$AbstractServiceFactory.getService(Activator.java:118)
> - waiting to lock <0x000000077ce19440> (a
> org.apache.felix.webconsole.plugins.memoryusage.internal.Activator$3)
> at
> org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:347)
> at
> org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:247)
> at
> org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:350)
> at org.apache.felix.framework.Felix.getService(Felix.java:3737)
> at
> org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:470)
> at
> org.apache.felix.metatype.internal.ManagedServiceTracker.addingService(ManagedServiceTracker.java:52)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:941)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:870)
> at
> org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)
> at
> org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:183)
> at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:318)
> at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:261)
> at
> org.apache.felix.metatype.internal.MetaTypeServiceImpl.<init>(MetaTypeServiceImpl.java:76)
> at
> org.apache.felix.metatype.internal.Activator.start(Activator.java:107)
> at
> org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:697)
> at org.apache.felix.framework.Felix.activateBundle(Felix.java:2240)
> at org.apache.felix.framework.Felix.startBundle(Felix.java:2146)
> at
> org.apache.felix.framework.Felix$RefreshHelper.restart(Felix.java:5097)
> at org.apache.felix.framework.Felix.refreshPackages(Felix.java:4291)
> at
> org.apache.felix.framework.FrameworkWiringImpl.run(FrameworkWiringImpl.java:188)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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