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Posted to log4j-dev@logging.apache.org by "Raman Gupta (JIRA)" <ji...@apache.org> on 2016/09/28 21:06:20 UTC
[jira] [Created] (LOG4J2-1618) JVM shutdown fails with
ClassCastException on SimpleLogger to Logger
Raman Gupta created LOG4J2-1618:
-----------------------------------
Summary: JVM shutdown fails with ClassCastException on SimpleLogger to Logger
Key: LOG4J2-1618
URL: https://issues.apache.org/jira/browse/LOG4J2-1618
Project: Log4j 2
Issue Type: Bug
Components: Core
Affects Versions: 2.6.2
Reporter: Raman Gupta
Apparently the fix for https://issues.apache.org/jira/browse/LOG4J2-1222 is causing a new issue:
```
2016-09-28 16:54:29,300 Thread-1 WARN Unable to register Log4j shutdown hook because JVM is shutting down. Using SimpleLogger
Exception in thread "Thread-1" java.lang.ExceptionInInitializerError
at io.grpc.internal.SharedResourceHolder.releaseInternal(SharedResourceHolder.java:152)
at io.grpc.internal.SharedResourceHolder.release(SharedResourceHolder.java:112)
at io.grpc.internal.ServerImpl.shutdown(ServerImpl.java:182)
at io.grpc.internal.ServerImpl.shutdown(ServerImpl.java:79)
at com.rocketraman.Foo.stop(Foo.kt:39)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassCastException: org.apache.logging.log4j.simple.SimpleLogger cannot be cast to org.apache.logging.log4j.core.Logger
at org.apache.logging.log4j.jul.CoreLoggerAdapter.newLogger(CoreLoggerAdapter.java:37)
at org.apache.logging.log4j.jul.CoreLoggerAdapter.newLogger(CoreLoggerAdapter.java:31)
at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:48)
at org.apache.logging.log4j.jul.LogManager.getLogger(LogManager.java:89)
at java.util.logging.LogManager.demandLogger(LogManager.java:551)
at java.util.logging.Logger.demandLogger(Logger.java:455)
at java.util.logging.Logger.getLogger(Logger.java:502)
at io.grpc.internal.LogExceptionRunnable.<clinit>(LogExceptionRunnable.java:47)
... 7 more
```
If I follow the chain of inheritance of `SimpleLogger`, the top-level interface is `org.apache.logging.log4j.Logger` from the -api bundle, not `org.apache.logging.log4j.core.Logger`.
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