liwenxian2017 created LOG4J2-1971:
-------------------------------------
Summary: ClassCastException:
org.eclipse.osgi.internal.loader.SystemBundleLoader$1 cannot be cast to
java.lang.ClassLoader
Key: LOG4J2-1971
URL: https://issues.apache.org/jira/browse/LOG4J2-1971
Project: Log4j 2
Issue Type: Bug
Affects Versions: 2.8
Reporter: liwenxian2017
When I migrated log4j from log4j 1.2.17 to log4j 2.8, There is an Exception
like this:
java.lang.ClassCastException:
org.eclipse.osgi.internal.loader.SystemBundleLoader$1 cannot be cast to
java.lang.ClassLoaderat
org.eclipse.osgi.internal.resolver.BundleDescriptionImpl$DescriptionWiring.getClassLoader(BundleDescriptionImpl.java:1229)
~[org.eclipse.osgi.jar:?]at
org.apache.logging.log4j.core.osgi.Activator.scanBundleForPlugins(Activator.java:70)
~[log4j-core.jar:2.8]at
org.apache.logging.log4j.core.osgi.Activator.bundleChanged(Activator.java:91)
~[log4j-core.jar:2.8]at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:847)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.internal.core.Framework.publishBundleEventPrivileged(Framework.java:1568)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.internal.core.Framework.publishBundleEvent(Framework.java:1504)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.internal.core.Framework.publishBundleEvent(Framework.java:1499)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:247)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
~[org.eclipse.osgi.jar:?]at
org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
~[org.eclipse.osgi.jar:?]
I checked Activator.java in log4j-core:
...
86 @Override
87 public void bundleChanged(final BundleEvent event) {
88 switch (event.getType()) {
89 // FIXME: STARTING instead of STARTED?
90 case BundleEvent.STARTED:
91 scanBundleForPlugins(event.getBundle());
92 break;
in line 91, it called scanBundleForPlugins for every bundles. But in line
60-61, it does not scan system bundle for plugins
57 private static void scanInstalledBundlesForPlugins(final BundleContext
context) {
58 final Bundle[] bundles = context.getBundles();
59 for (final Bundle bundle : bundles) {
60 // LOG4J2-920: don't scan system bundle for plugins
61 if (bundle.getState() == Bundle.ACTIVE && bundle.getBundleId() != 0) {
62 // TODO: bundle state can change during this
63 scanBundleForPlugins(bundle);
And org.eclipse.osgi_3.8.1 's bundle ID is just 0. So it skipped bundle
org.eclipse.osgi in line 61-63. but it does not in line 91
If I changed line 91 to:
if (event.getBundle().getState() == Bundle.ACTIVE &&
event.getBundle().getBundleId() != 0) {
scanBundleForPlugins(event.getBundle());
}
The exception goes away.
So is this a bug? Or this is NOT a bug and there is a workaround for this
Exception? Thanks.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
