[logback-dev] [JIRA] Resolved: (LBCLASSIC-120) Joran configuration not working in OSGi environment

[Ceki Gulcu (JIRA)]

     [ http://jira.qos.ch/browse/LBCLASSIC-120?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ceki Gulcu resolved LBCLASSIC-120.
----------------------------------

    Fix Version/s: 0.9.18
       Resolution: Fixed

As part of the build, logback bundles are now tested to run with Felix. It is this assumed that slf4j+logback bundles work with other OSGi containers as well. Moreover, the tests actually invoke logback configuration via XML.



> Joran configuration not working in OSGi environment
> ---------------------------------------------------
>
>                 Key: LBCLASSIC-120
>                 URL: http://jira.qos.ch/browse/LBCLASSIC-120
>             Project: logback-classic
>          Issue Type: Bug
>          Components: joran
>    Affects Versions: 0.9.15
>         Environment: OSGi Service Platform Release 4
>            Reporter: Pavol Juhos
>            Assignee: Ceki Gulcu
>             Fix For: 0.9.18
>
>
> When running in OSGi environment, JoranConfigurator throws a ClassCastException when trying to parse the Logback XML configuration file. The problem seems to be caused by OSGi-unfriendly JAXP parser discovery mechanism as suggested by Dieter Wimberger in his blog post -- http://wimpi.coalevo.net/2008/04/hack-how-to-use-logback.html
> "[...] JAXP discovery mechanism assume visibility of the parser through the context ClassLoader of the actual thread, which may cause some troubles."
> Observed exception stack trace:
> Failed to auto configure default logger context
> Reported exception:
> ch.qos.logback.core.joran.spi.JoranException: Parser configuration error occured
>       at ch.qos.logback.core.joran.event.SaxEventRecorder.recordEvents(SaxEventRecorder.java:63)
>       at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:105)
>       at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:76)
>       at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:40)
>       at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:47)
>       at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:108)
>       at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85)
>       at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:56)
>       at org.slf4j.LoggerFactory.getSingleton(LoggerFactory.java:189)
>       at org.slf4j.LoggerFactory.bind(LoggerFactory.java:112)
>       at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:105)
>       at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:235)
>       at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:208)
>       at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:221)
>       at com.foo.bar.server.config.Configuration.<clinit>(Configuration.java:244)
>       at com.foo.bar.server.ServerBundleActivator.start(ServerBundleActivator.java:39)
>       at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:589)
>       at org.apache.felix.framework.Felix._startBundle(Felix.java:1671)
>       at org.apache.felix.framework.Felix.startBundle(Felix.java:1588)
>       at org.apache.felix.framework.Felix.setFrameworkStartLevel(Felix.java:1180)
>       at org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl.java:265)
>       at java.lang.Thread.run(Unknown Source)
> Caused by: java.lang.ClassCastException: org.apache.xerces.jaxp.SAXParserFactoryImpl
>       at javax.xml.parsers.SAXParserFactory.newInstance(Unknown Source)
>       at ch.qos.logback.core.joran.event.SaxEventRecorder.recordEvents(SaxEventRecorder.java:56)
>       ... 21 more

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