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https://issues.apache.org/jira/browse/LOG4J2-139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13545271#comment-13545271
]
Joern Huxhorn commented on LOG4J2-139:
--------------------------------------
Found the solution: the appender was missing a protocol attribute.
<?xml version="1.0" encoding="UTF-8"?>
<configuration status="debug">
<appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level
%logger{36} --- %msg%n"/>
</Console>
<Socket name="Socket" host="localhost" port="4560"
protocol="TCP">
<!-- https://issues.apache.org/jira/browse/LOG4J2-139
-->
<SerializedLayout />
</Socket>
</appenders>
<loggers>
<root level="all">
<appender-ref ref="Console"/>
<appender-ref ref="Socket"/>
</root>
</loggers>
</configuration>
works as expected.
> NPE while using SocketAppender
> ------------------------------
>
> Key: LOG4J2-139
> URL: https://issues.apache.org/jira/browse/LOG4J2-139
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.0-beta3
> Environment:
> ------------------------------------------------------------
> Gradle 1.3
> ------------------------------------------------------------
> Gradle build time: Dienstag, 20. November 2012 11:37 Uhr UTC
> Groovy: 1.8.6
> Ant: Apache Ant(TM) version 1.8.4 compiled on May 22 2012
> Ivy: 2.2.0
> JVM: 1.7.0_10 (Oracle Corporation 23.6-b04)
> OS: Mac OS X 10.8.2 x86_64
> Reporter: Joern Huxhorn
>
> I try to use the SocketAppender and get the following ERROR/NPE:
> 2013-01-06 00:54:14,024 DEBUG Generated plugins in 0.000032000 seconds
> 2013-01-06 00:54:14,044 DEBUG Calling createLayout on class
> org.apache.logging.log4j.core.layout.PatternLayout for element PatternLayout
> with params(pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} --- %msg%n",
> Configuration(/Users/jhuxhorn/Documents/Projects/huxi/lilith/sandbox/log4j2-sandbox/build/resources/main/log4j2.xml),
> null, charset="null")
> 2013-01-06 00:54:14,045 DEBUG Generated plugins in 0.000029000 seconds
> 2013-01-06 00:54:14,049 DEBUG Calling createAppender on class
> org.apache.logging.log4j.core.appender.ConsoleAppender for element Console
> with params(PatternLayout(%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} ---
> %msg%n), null, target="SYSTEM_OUT", name="Console", suppressExceptions="null")
> 2013-01-06 00:54:14,049 DEBUG Calling createLayout on class
> org.apache.logging.log4j.core.layout.SerializedLayout for element
> SerializedLayout
> 2013-01-06 00:54:14,052 DEBUG Calling createAppender on class
> org.apache.logging.log4j.core.appender.SocketAppender for element Socket with
> params(host="localhost", port="4560", protocol="null",
> reconnectionDelay="null", name="Socket", immediateFlush="null",
> suppressExceptions="null",
> SerializedLayout(org.apache.logging.log4j.core.layout.SerializedLayout@5cc4211b),
> null)
> 2013-01-06 00:54:14,054 ERROR Unable to invoke method createAppender in class
> org.apache.logging.log4j.core.appender.SocketAppender for element Socket
> java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at
> org.apache.logging.log4j.core.config.BaseConfiguration.createPluginObject(BaseConfiguration.java:711)
> at
> org.apache.logging.log4j.core.config.BaseConfiguration.createConfiguration(BaseConfiguration.java:477)
> at
> org.apache.logging.log4j.core.config.BaseConfiguration.createConfiguration(BaseConfiguration.java:469)
> at
> org.apache.logging.log4j.core.config.BaseConfiguration.doConfigure(BaseConfiguration.java:156)
> at
> org.apache.logging.log4j.core.config.BaseConfiguration.start(BaseConfiguration.java:114)
> at
> org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:251)
> at
> org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:267)
> at
> org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:134)
> at
> org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:75)
> at
> org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:30)
> at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:165)
> at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:174)
> at de.huxhorn.lilith.sandbox.Log4j2Sandbox.main(Log4j2Sandbox.java:43)
> Caused by: java.lang.NullPointerException
> at
> org.apache.logging.log4j.core.appender.SocketAppender.createSocketManager(SocketAppender.java:95)
> at
> org.apache.logging.log4j.core.appender.SocketAppender.createAppender(SocketAppender.java:86)
> ... 17 more
> 2013-01-06 00:54:14,056 ERROR Null object returned for Socket in appenders
> My configuration looks like this:
> <?xml version="1.0" encoding="UTF-8"?>
> <configuration status="debug">
> <appenders>
> <Console name="Console" target="SYSTEM_OUT">
> <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level
> %logger{36} --- %msg%n"/>
> </Console>
> <Socket name="Socket" host="localhost" port="4560">
> <SerializedLayout />
> </Socket>
> </appenders>
> <loggers>
> <root level="all">
> <appender-ref ref="Console"/>
> <appender-ref ref="Socket"/>
> </root>
> </loggers>
> </configuration>
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