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Posted to dev@felix.apache.org by "Robert Munteanu (JIRA)" <ji...@apache.org> on 2019/02/22 11:57:00 UTC
[jira] [Updated] (FELIX-6067) ClassLoading can fail unpredictably
due to interrupts
[ https://issues.apache.org/jira/browse/FELIX-6067?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Munteanu updated FELIX-6067:
-----------------------------------
Description:
I noticed an intermittent issue with our Felix-based app (Apache Sling). The flows seems to be the following:
(thread 1)
- component C is started
- component C invokes method on class K1
- class K1 is first accessed now and runs class initializers
- K1 static initializer calls method from class K2
- class K2 loading is triggered
(thread 2)
- component C is stopped ( I _think_ due to configuration coming in )
(thread 1)
- during class loading of K2 a RuntimeException is thrown, resulting in all calls to K1 leading to NoClassDefFoundError
At this point although the error should be transient the component is unusable since one of the classes it uses is not available.
For the record, the stack trace which causes this is
{noformat}
21.02.2019 14:50:50.292 *ERROR* [Apache Sling Repository Startup Thread #1] org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager start: Uncaught Throwable trying to access Repository, calling stopRepository()
java.lang.ExceptionInInitializerError: null
at org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager.acquireRepository(OakSlingRepositoryManager.java:144) [org.apache.sling.jcr.oak.server:1.2.0]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.initializeAndRegisterRepositoryService(AbstractSlingRepositoryManager.java:481) [org.apache.sling.jcr.base:3.0.6]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.access$300(AbstractSlingRepositoryManager.java:86) [org.apache.sling.jcr.base:3.0.6]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager$4.run(AbstractSlingRepositoryManager.java:462) [org.apache.sling.jcr.base:3.0.6]
Caused by: java.lang.RuntimeException: java.lang.InterruptedException
at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:369)
at org.apache.felix.framework.Felix.getService(Felix.java:3954)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.transformClass(BundleWiringImpl.java:2383)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2081)
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1565)
at org.apache.felix.framework.BundleWiringImpl.access$300(BundleWiringImpl.java:79)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1982)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.apache.jackrabbit.oak.plugins.tree.factories.RootFactory.createSystemRoot(RootFactory.java:80) [org.apache.jackrabbit.oak-core:1.8.8]
at org.apache.jackrabbit.oak.InitialContent.initialize(InitialContent.java:134) [org.apache.jackrabbit.oak-core:1.8.8]
at org.apache.jackrabbit.oak.InitialContent.createInitialContent(InitialContent.java:74) [org.apache.jackrabbit.oak-core:1.8.8]
at org.apache.jackrabbit.oak.InitialContent.<clinit>(InitialContent.java:70) [org.apache.jackrabbit.oak-core:1.8.8]
... 4 common frames omitted
Caused by: java.lang.InterruptedException: null
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1302)
at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:365)
... 15 common frames omitted
{noformat}
(source code for all classes is available if needed)
Starting the component C at any later time fails with
{noformat}
21.02.2019 14:50:50.310 *ERROR* [Apache Sling Repository Startup Thread #2] org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager start: Uncaught Throwable trying to access Repository, calling stopRepository()
java.lang.NoClassDefFoundError: Could not initialize class org.apache.jackrabbit.oak.InitialContent
at org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager.acquireRepository(OakSlingRepositoryManager.java:144) [org.apache.sling.jcr.oak.server:1.2.0]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.initializeAndRegisterRepositoryService(AbstractSlingRepositoryManager.java:481) [org.apache.sling.jcr.base:3.0.6]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.access$300(AbstractSlingRepositoryManager.java:86) [org.apache.sling.jcr.base:3.0.6]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager$4.run(AbstractSlingRepositoryManager.java:462) [org.apache.sling.jcr.base:3.0.6]
{noformat}
was:
I noticed an intermittent issue with our Felix-based app (Apache Sling). The flows seems to be the following:
(thread 1)
- component C is started
- component C invokes method on class K1
- class K1 is first accessed now and runs class initializers
- K1 static initializer calls method from class K2
- class K2 loading is triggered
(thread 2)
- component C is stopped ( I _think_ due to configuration coming in )
(thread 1)
- during class loading of K2 a RuntimeException is thrown, resulting in all calls to K1 leading to NoClassDefFoundError
At this point although the error should be transient the component is unusable since one of the classes it uses is not available.
For the record, the stack trace which causes this is
21.02.2019 14:50:50.292 *ERROR* [Apache Sling Repository Startup Thread #1] org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager start: Uncaught Throwable trying to access Repository, calling stopRepository()
java.lang.ExceptionInInitializerError: null
at org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager.acquireRepository(OakSlingRepositoryManager.java:144) [org.apache.sling.jcr.oak.server:1.2.0]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.initializeAndRegisterRepositoryService(AbstractSlingRepositoryManager.java:481) [org.apache.sling.jcr.base:3.0.6]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.access$300(AbstractSlingRepositoryManager.java:86) [org.apache.sling.jcr.base:3.0.6]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager$4.run(AbstractSlingRepositoryManager.java:462) [org.apache.sling.jcr.base:3.0.6]
Caused by: java.lang.RuntimeException: java.lang.InterruptedException
at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:369)
at org.apache.felix.framework.Felix.getService(Felix.java:3954)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.transformClass(BundleWiringImpl.java:2383)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2081)
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1565)
at org.apache.felix.framework.BundleWiringImpl.access$300(BundleWiringImpl.java:79)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1982)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.apache.jackrabbit.oak.plugins.tree.factories.RootFactory.createSystemRoot(RootFactory.java:80) [org.apache.jackrabbit.oak-core:1.8.8]
at org.apache.jackrabbit.oak.InitialContent.initialize(InitialContent.java:134) [org.apache.jackrabbit.oak-core:1.8.8]
at org.apache.jackrabbit.oak.InitialContent.createInitialContent(InitialContent.java:74) [org.apache.jackrabbit.oak-core:1.8.8]
at org.apache.jackrabbit.oak.InitialContent.<clinit>(InitialContent.java:70) [org.apache.jackrabbit.oak-core:1.8.8]
... 4 common frames omitted
Caused by: java.lang.InterruptedException: null
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1302)
at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:365)
... 15 common frames omitted
(source code for all is available is needed)
Starting the component C at any later time fails with
21.02.2019 14:50:50.310 *ERROR* [Apache Sling Repository Startup Thread #2] org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager start: Uncaught Throwable trying to access Repository, calling stopRepository()
java.lang.NoClassDefFoundError: Could not initialize class org.apache.jackrabbit.oak.InitialContent
at org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager.acquireRepository(OakSlingRepositoryManager.java:144) [org.apache.sling.jcr.oak.server:1.2.0]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.initializeAndRegisterRepositoryService(AbstractSlingRepositoryManager.java:481) [org.apache.sling.jcr.base:3.0.6]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.access$300(AbstractSlingRepositoryManager.java:86) [org.apache.sling.jcr.base:3.0.6]
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager$4.run(AbstractSlingRepositoryManager.java:462) [org.apache.sling.jcr.base:3.0.6]
> ClassLoading can fail unpredictably due to interrupts
> -----------------------------------------------------
>
> Key: FELIX-6067
> URL: https://issues.apache.org/jira/browse/FELIX-6067
> Project: Felix
> Issue Type: Bug
> Components: Framework
> Affects Versions: framework-6.0.2
> Reporter: Robert Munteanu
> Priority: Major
>
> I noticed an intermittent issue with our Felix-based app (Apache Sling). The flows seems to be the following:
> (thread 1)
> - component C is started
> - component C invokes method on class K1
> - class K1 is first accessed now and runs class initializers
> - K1 static initializer calls method from class K2
> - class K2 loading is triggered
> (thread 2)
> - component C is stopped ( I _think_ due to configuration coming in )
> (thread 1)
> - during class loading of K2 a RuntimeException is thrown, resulting in all calls to K1 leading to NoClassDefFoundError
> At this point although the error should be transient the component is unusable since one of the classes it uses is not available.
> For the record, the stack trace which causes this is
> {noformat}
> 21.02.2019 14:50:50.292 *ERROR* [Apache Sling Repository Startup Thread #1] org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager start: Uncaught Throwable trying to access Repository, calling stopRepository()
> java.lang.ExceptionInInitializerError: null
> at org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager.acquireRepository(OakSlingRepositoryManager.java:144) [org.apache.sling.jcr.oak.server:1.2.0]
> at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.initializeAndRegisterRepositoryService(AbstractSlingRepositoryManager.java:481) [org.apache.sling.jcr.base:3.0.6]
> at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.access$300(AbstractSlingRepositoryManager.java:86) [org.apache.sling.jcr.base:3.0.6]
> at org.apache.sling.jcr.base.AbstractSlingRepositoryManager$4.run(AbstractSlingRepositoryManager.java:462) [org.apache.sling.jcr.base:3.0.6]
> Caused by: java.lang.RuntimeException: java.lang.InterruptedException
> at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:369)
> at org.apache.felix.framework.Felix.getService(Felix.java:3954)
> at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.transformClass(BundleWiringImpl.java:2383)
> at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2081)
> at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1565)
> at org.apache.felix.framework.BundleWiringImpl.access$300(BundleWiringImpl.java:79)
> at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1982)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at org.apache.jackrabbit.oak.plugins.tree.factories.RootFactory.createSystemRoot(RootFactory.java:80) [org.apache.jackrabbit.oak-core:1.8.8]
> at org.apache.jackrabbit.oak.InitialContent.initialize(InitialContent.java:134) [org.apache.jackrabbit.oak-core:1.8.8]
> at org.apache.jackrabbit.oak.InitialContent.createInitialContent(InitialContent.java:74) [org.apache.jackrabbit.oak-core:1.8.8]
> at org.apache.jackrabbit.oak.InitialContent.<clinit>(InitialContent.java:70) [org.apache.jackrabbit.oak-core:1.8.8]
> ... 4 common frames omitted
> Caused by: java.lang.InterruptedException: null
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1302)
> at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
> at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:365)
> ... 15 common frames omitted
> {noformat}
> (source code for all classes is available if needed)
> Starting the component C at any later time fails with
> {noformat}
> 21.02.2019 14:50:50.310 *ERROR* [Apache Sling Repository Startup Thread #2] org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager start: Uncaught Throwable trying to access Repository, calling stopRepository()
> java.lang.NoClassDefFoundError: Could not initialize class org.apache.jackrabbit.oak.InitialContent
> at org.apache.sling.jcr.oak.server.internal.OakSlingRepositoryManager.acquireRepository(OakSlingRepositoryManager.java:144) [org.apache.sling.jcr.oak.server:1.2.0]
> at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.initializeAndRegisterRepositoryService(AbstractSlingRepositoryManager.java:481) [org.apache.sling.jcr.base:3.0.6]
> at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.access$300(AbstractSlingRepositoryManager.java:86) [org.apache.sling.jcr.base:3.0.6]
> at org.apache.sling.jcr.base.AbstractSlingRepositoryManager$4.run(AbstractSlingRepositoryManager.java:462) [org.apache.sling.jcr.base:3.0.6]
> {noformat}
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