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https://issues.apache.org/jira/browse/LOG4J2-914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kaj Bjurman updated LOG4J2-914:
-------------------------------
Priority: Minor (was: Major)
> ThrowableProxy.getExtendedStackTraceAsString causes NullpointerException
> -------------------------------------------------------------------------
>
> Key: LOG4J2-914
> URL: https://issues.apache.org/jira/browse/LOG4J2-914
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.1
> Reporter: Kaj Bjurman
> Priority: Minor
>
> I'm trying to write a poc with Log4j 2.1, where distributed processes are
> logging to a remote server. The server is currently running the bundled
> TcpSocketServer.createSerializedSocketServer with a custom layout plugin.
> A process is logging an exception. I can then see in the custom layout plugin
> at the log server that the LogEvent doesn't contain a thrown, but that it
> contains a thrownProxy. So far so good. I'm then trying to get hold of a
> String representation of the message + stacktrace. I thought that I would be
> able to e.g invoke ThrowableProxy.getExtendedStackTraceAsString(), but that
> causes a NullPointerException since the throwable in the ThrowableProxy also
> is null after deserialization. Looks like ThrowableProxy assumes that
> throwable isn't null in a few methods.
> The exception that is logged by the client process is a simple new
> Exception("A message");
> The pom.xml that I'm using:
> <dependency>
> <groupId>org.apache.logging.log4j</groupId>
> <artifactId>log4j-api</artifactId>
> <version>2.1</version>
> </dependency>
> <dependency>
> <groupId>org.apache.logging.log4j</groupId>
> <artifactId>log4j-core</artifactId>
> <version>2.1</version>
> </dependency>
> <dependency>
> <groupId>com.lmax</groupId>
> <artifactId>disruptor</artifactId>
> <version>3.3.0</version>
> </dependency>
> The stacktrace that I get in the server:
> 2014-12-05 14:30:44,601 ERROR An exception occurred processing Appender XXXXX
> java.lang.NullPointerException
> at
> org.apache.logging.log4j.core.impl.ThrowableProxy.getExtendedStackTraceAsString(ThrowableProxy.java:340)
> at
> org.apache.logging.log4j.core.impl.ThrowableProxy.getExtendedStackTraceAsString(ThrowableProxy.java:323)
> Workaround:
> To invoke ThrowableProxy. getExtendedStackTrace() and format the stacktrace +
> message with my own format methods.
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