The JBI components classloader sometime fails to load classes or resources
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Key: SMX4NMR-97
URL: https://issues.apache.org/activemq/browse/SMX4NMR-97
Project: ServiceMix NMR
Issue Type: Bug
Reporter: Guillaume Nodet
Assignee: Guillaume Nodet
Fix For: 1.0.0
processstoreimp...@24390 daemon, priority=5, in group 'main', status: 'RUNNING'
at
org.apache.felix.framework.URLHandlersBundleStreamHandler.openConnection(URLHandlersBundleStreamHandler.java:69)
at java.net.URL.openConnection(URL.java:943)
at
sun.net.www.protocol.jar.JarURLConnection.<init>(JarURLConnection.java:64)
at sun.net.www.protocol.jar.Handler.openConnection(Handler.java:24)
at java.net.URL.openConnection(URL.java:943)
at java.net.URL.openStream(URL.java:1,007)
at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1,216)
at java.lang.Class.getResourceAsStream(Class.java:1,998)
at
org.apache.openjpa.conf.OpenJPAVersion.<clinit>(OpenJPAVersion.java:50)
at
org.apache.openjpa.kernel.AbstractBrokerFactory.getFactoryInitializationBanner(AbstractBrokerFactory.java:663)
at
org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:616)
at
org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:183)
at
org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:142)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:192)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:145)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:56)
at
org.apache.ode.store.jpa.DbConfStoreConnectionFactory.getConnection(DbConfStoreConnectionFactory.java:49)
at
org.apache.ode.store.ProcessStoreImpl.getConnection(ProcessStoreImpl.java:549)
at
org.apache.ode.store.ProcessStoreImpl.access$300(ProcessStoreImpl.java:74)
at
org.apache.ode.store.ProcessStoreImpl$Callable.call(ProcessStoreImpl.java:698)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:613)
The reason is that the jbi classloader is create with bundle urls
pointing to the libraries embedded in the component.
For example:
bundle://72.0:1/lib/openjpa-1.1.0.jar
Those URLs are resolved correctly to locate resources, so we end up
with urls like:
jar:bundle://72.0:1/lib/openjpa-1.1.0.jar!/org/apache/openjpa/kernel/localizer.properties
Now, the problem is that they fail to be opened at the above point in
the code. THis is because Felix is trying to find on the stack trace
a classloader which is of type
org.apache.felix.framework.searchpolicy.ContentClassLoader (in the
URLHandlers#getFrameworkContext() method). But there's none because
all classes are loaded from the JBI component classloader instead of
a felix classloader in this case.
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