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https://issues.apache.org/jira/browse/LOG4J2-1658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15629206#comment-15629206
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Leon Finker commented on LOG4J2-1658:
-------------------------------------
Also, I only mentioned OSGi as to the reason we set BasicContextSelector so
that we don't get separate context and disruptors created per (Felix) OSGi
bundle. The NPE is not related to OSGi. It's reproducible just by setting
BasicContextSelector and Configurator.initialize (without any OSGi in the
picture).
> 2.7 - ThreadContextAccess.getThreadContextMap NPE when specifying
> BasicContextSelector
> --------------------------------------------------------------------------------------
>
> Key: LOG4J2-1658
> URL: https://issues.apache.org/jira/browse/LOG4J2-1658
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.7
> Environment: Windows, JVM 1.8.0_66
> Reporter: Leon Finker
> Assignee: Remko Popma
>
> We have a custom OSGi based application. We specify
> Log4jContextSelector=org.apache.logging.log4j.core.selector.BasicContextSelector.
> We initialize log4j through
> Configurator.initialize("main", logConfigPath);
> Starting from log4j2 2.7 above line fails due to
> NPE/ExceptionInInitializerError in LogManager static init block. I found a
> work around by specifying disableThreadContextMap=true. This is 2.7 specific
> change.
> {noformat}
> Exception in thread "main" java.lang.ExceptionInInitializerError
> at
> org.apache.logging.log4j.ThreadContextAccess.getThreadContextMap(ThreadContextAccess.java:45)
> at
> org.apache.logging.log4j.core.impl.ContextDataInjectorFactory.createDefaultInjector(ContextDataInjectorFactory.java:83)
> at
> org.apache.logging.log4j.core.impl.ContextDataInjectorFactory.createInjector(ContextDataInjectorFactory.java:67)
> at
> org.apache.logging.log4j.core.lookup.ContextMapLookup.<init>(ContextMapLookup.java:34)
> at
> org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:116)
> at
> org.apache.logging.log4j.core.config.AbstractConfiguration.<init>(AbstractConfiguration.java:120)
> at
> org.apache.logging.log4j.core.config.NullConfiguration.<init>(NullConfiguration.java:32)
> at
> org.apache.logging.log4j.core.LoggerContext.<clinit>(LoggerContext.java:72)
> at
> org.apache.logging.log4j.core.selector.BasicContextSelector.<clinit>(BasicContextSelector.java:32)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
> at
> org.apache.logging.log4j.util.LoaderUtil.newInstanceOf(LoaderUtil.java:158)
> at
> org.apache.logging.log4j.util.LoaderUtil.newInstanceOf(LoaderUtil.java:180)
> at
> org.apache.logging.log4j.util.LoaderUtil.newCheckedInstanceOf(LoaderUtil.java:201)
> at
> org.apache.logging.log4j.util.LoaderUtil.newCheckedInstanceOfProperty(LoaderUtil.java:226)
> at
> org.apache.logging.log4j.core.impl.Log4jContextFactory.createContextSelector(Log4jContextFactory.java:97)
> at
> org.apache.logging.log4j.core.impl.Log4jContextFactory.<init>(Log4jContextFactory.java:58)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
> at java.lang.Class.newInstance(Class.java:442)
> at org.apache.logging.log4j.LogManager.<clinit>(LogManager.java:94)
> at
> org.apache.logging.log4j.core.config.Configurator.getFactory(Configurator.java:46)
> at
> org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:157)
> at
> org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:131)
> at
> org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:101)
> at
> org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:188)
> at
> com.tradingscreen.client.tradesmart.OSGiMain.initLogging(OSGiMain.java:264)
> at com.tradingscreen.client.tradesmart.OSGiMain.main(OSGiMain.java:86)
> Caused by: java.lang.NullPointerException
> at
> org.apache.logging.log4j.spi.ThreadContextMapFactory.createThreadContextMap(ThreadContextMapFactory.java:59)
> at org.apache.logging.log4j.ThreadContext.init(ThreadContext.java:222)
> at
> org.apache.logging.log4j.ThreadContext.<clinit>(ThreadContext.java:201)
> ... 32 more
> {noformat}
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