Re: [jetty-users] Baffling nullpointer on a LOG statement?

[Joakim Erdfelt <joakim@xxxxxxxxxxx>]

Somehow the LOG object itself is null.

Not sure how that's possible.

The Log.getLogger() is wired up on first access.

https://github.com/eclipse/jetty.project/blob/jetty-7.6.1.v20120215/jetty-util/src/main/java/org/eclipse/jetty/util/log/Log.java#L125

Try setting up the Logger manually.

At the earliest point you can in your code, set the Logger implementation.

Log.setLogger(new StdErrLog()); or

Log.setLogger(new Slf4jLog()); or

Log.setLogger(new JavaUtilLog());

http://download.eclipse.org/jetty/stable-7/apidocs/org/eclipse/jetty/util/log/package-summary.html

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Joakim Erdfelt <joakim@xxxxxxxxxxx>

On Fri, Sep 28, 2012 at 8:04 AM, ceposta <christian.posta@xxxxxxxxx> wrote:

Any committers can help me understand how this could happen? I'm seeing a
null pointer at a logging statement at line 199 in AbstractLifeCycle:

        LOG.warn(FAILED+" " + this+": "+th,th);


I'm looking at    <jetty-version>7.6.1.v20120215</jetty-version>

The code for how we are starting the jetty server is here (line 146):

http://svn.apache.org/viewvc/activemq/activemq-apollo/trunk/apollo-broker/src/main/scala/org/apache/activemq/apollo/broker/jetty/WebSocketTransportFactory.scala?view=markup

And I see this stack trace:

2012-09-28 07:27:03,551 | WARN | stackref=13a0b579cf2
java.lang.NullPointerException
at
org.eclipse.jetty.util.component.AbstractLifeCycle.setFailed(AbstractLifeCycle.java:199)
at
org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at
org.apache.activemq.apollo.broker.jetty.WebSocketTransportFactory$WsTransportServer$$anonfun$_start$1.apply$mcV$sp(WebSocketTransportFactory.scala:146)
at org.fusesource.hawtdispatch.package$$anon$3.run(hawtdispatch.scala:357)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)



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