I believe javac is only included in the full JDK (not JRE). Do
'which javac' or 'locate javac' or just do a fine in your $JAVA_HOME
dir and look for javac.
Thanks for the input. Yes, the issue was actually a JDK vs. JRE problem.
What had confused me was that even after changing JAVA_HOME to the
1.4 JDK, I still got the same server result (internal server error)
from clicking on the http://master:50030/jobdetails.jsp.
But that was now caused by a different problem - if you don't pass in
a valid jobid param to the jobdetails.jsp, it dies with a null
pointer exception. This guy is only designed to be used via links
from the jobtracker.jsp page.
And thanks to Andrzej for his November post that noted this.
-- Ken
----- Original Message ----
From: Ken Krugler <[EMAIL PROTECTED]>
To: [email protected]
Sent: Sat 14 Jan 2006 05:50:00 PM EST
Subject: [Nutch-general] Error running MapReduce - Jetty server & .jsp files
Hi all,
After a bit of thrashing with RSA keys and having to move
/Nutch/src/webapps up to /Nutch, I've gotten the 1/12/2006 build of
Nutch running on three servers.
The "master" is running as a NameNode & JobTracker, and two slaves
are running as DataNodes and TaskTrackers.
I'm running into a problem with using the JobTracker web interface.
I can see the two .jsp files (jobdetails.jsp and jobtracker.jsp) when
I point my browser at http://master:50030, but when I actually try to
run one of the JSPs (e.g. http://master:50030/jobdetails.jsp) I get a
500 error.
The nutch-crawler-jobtracker-main1.log file on the master tells me
that Jetty wasn't able to compile the .jsp because of a classpath
problem. The relevant portion of the log says:
060114 110818 SEVERE Javac exception
Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
[snip]
I've verified that JAVA_HOME is set to /usr/java/jre1.5.0_05
Is the problem because this isn't a full JDK?
What's confusing to me is that the classpath dumped by Jetty in the
log looks like:
classpath=/tmp/Jetty__50030___24406:/usr/java/jre1.5.0_05/lib/ext/localedata.jar:/usr/java/jre1.5.0_05/lib/ext/sunpkcs11.jar
[snip]
So obviously somebody is using JAVA_HOME to build the path to these
.jar files.
But JAVA_HOME (the top-level path, ie /usr/java/jre1.5.0_05) isn't a
member of this classpath.
Any help would be appreciated!
Thanks,
-- Ken
--
Ken Krugler
