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https://issues.apache.org/jira/browse/KARAF-3350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14220928#comment-14220928
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Guillaume Nodet commented on KARAF-3350:
----------------------------------------
Fwiw, calling log:clear before any other command is a good workaround.
> The log:display command fails with CNFE if the pax-logging-service bundle has
> been refreshed
> --------------------------------------------------------------------------------------------
>
> Key: KARAF-3350
> URL: https://issues.apache.org/jira/browse/KARAF-3350
> Project: Karaf
> Issue Type: Bug
> Reporter: Guillaume Nodet
>
> {code}
> JBossFuse:karaf@root> fabric:create --wait-for-provisioning
> Waiting for container: root
> Waiting for container root to provision.
> Error executing command: Unable to create zookeeper server configuration
> JBossFuse:karaf@root> log:display
> Error executing command: org/ops4j/pax/logging/service/internal/PaxLevelImpl
> JBossFuse:karaf@root>
> JBossFuse:karaf@root> log:display-exception
> java.lang.NoClassDefFoundError:
> org/ops4j/pax/logging/service/internal/PaxLevelImpl
> at
> org.ops4j.pax.logging.service.internal.PaxLoggingEventImpl.getLevel(PaxLoggingEventImpl.java:92)[5:org.ops4j.pax.logging.pax-logging-service:1.8.0]
> at org.apache.karaf.shell.log.DisplayLog.getColor(DisplayLog.java:171)
> at org.apache.karaf.shell.log.DisplayLog.display(DisplayLog.java:143)
> at org.apache.karaf.shell.log.DisplayLog.doExecute(DisplayLog.java:135)
> at
> org.apache.karaf.shell.console.OsgiCommandSupport.execute(OsgiCommandSupport.java:38)
> at
> org.apache.felix.gogo.commands.basic.AbstractCommand.execute(AbstractCommand.java:35)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.7.0_55]
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)[:1.7.0_55]
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.7.0_55]
> at java.lang.reflect.Method.invoke(Method.java:606)[:1.7.0_55]
> at org.apache.aries.proxy.impl.ProxyHandler$1.invoke(ProxyHandler.java:54)
> at org.apache.aries.proxy.impl.ProxyHandler.invoke(ProxyHandler.java:119)
> at
> org.apache.karaf.shell.console.commands.$BlueprintCommand272358056.execute(Unknown
> Source)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.felix.gogo.runtime.CommandProxy.execute(CommandProxy.java:78)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:477)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:403)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.felix.gogo.runtime.Closure.execute(Closure.java:183)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.felix.gogo.runtime.Closure.execute(Closure.java:120)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.felix.gogo.runtime.CommandSessionImpl.execute(CommandSessionImpl.java:92)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.karaf.shell.console.jline.Console.run(Console.java:196)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> at
> org.apache.karaf.shell.console.jline.DelayedStarted.run(DelayedStarted.java:79)[28:org.apache.karaf.shell.console:2.4.0.redhat-620042]
> Caused by: java.lang.ClassNotFoundException: Unable to load class
> 'org.ops4j.pax.logging.service.internal.PaxLevelImpl' because the bundle
> wiring for org.ops4j.pax.logging.pax-logging-service is no longer valid.
> at
> org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1521)
> at
> org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:77)
> at
> org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1993)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:358)[:1.7.0_55]
> ... 22 more
> {code}
> This is caused by old events being kept in memory but the implementation
> classes aren't available anymore.
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