Hi Drew,
I don't know if this is actually the issue or not, but the output below makes
me think you might be passing Cygwin pathes into the java.exe launcher. If
that's the case, it won't work. java.exe is pure Windows and doesn't know
about '/cygdrive/c' for example (it also expects the path separator to be
semicolon rather than colon). Every once in a while when I try to use java.exe
from the Cygwin CLI on my Windows box, I get bitten by this.
Sandy
-Original Message-
From: Drew Gross [mailto:drew.a.gr...@gmail.com]
Sent: Tuesday, June 21, 2011 21:26
To: common-user@hadoop.apache.org
Subject: Re: ClassNotFoundException while running quick start guide on
Windows.
Thanks Jeff, it was a problem with JAVA_HOME. I have another problem now
though, I have this:
$JAVA: /cygdrive/c/Program Files/Java/jdk1.6.0_26/bin/java
$JAVA_HEAP_MAX: -Xmx1000m
$HADOOP_OPTS: -Dhadoop.log.dir=C:\Users\Drew
Gross\Documents\Projects\discom\hadoop-0.21.0\logs
-Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=C:\Users\Drew
Gross\Documents\Projects\discom\hadoop-0.21.0\ -Dhadoop.id.str= -
Dhadoop.root.logger=INFO,console
-Djava.library.path=/cygdrive/c/Users/Drew
Gross/Documents/Projects/discom/hadoop-0.21.0/lib/native/
-Dhadoop.policy.file=hadoop-policy.xml
$CLASS: org.apache.hadoop.util.RunJar
Exception in thread main java.lang.NoClassDefFoundError:
Gross\Documents\Projects\discom\hadoop-0/21/0\logs
Caused by: java.lang.ClassNotFoundException:
Gross\Documents\Projects\discom\hadoop-0.21.0\logs
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class:
Gross\Documents\Projects\discom\hadoop-0.21.0\logs. Program will exit.
(This is with some extra debugging info added by me in bin/hadoop)
It looks like the windows style file names are causing problems, especially
the
spaces. Has anyone encountered this before, and know how to fix? I tried
escaping the spaces and surrounding the file paths with quotes (not at the
same time), but that didn't help.
Drew
On Tue, Jun 21, 2011 at 6:24 AM, madhu phatak phatak@gmail.com
wrote:
I think the jar have some issuses where its not able to read the Main
class from manifest . try unjar the jar and see in Manifest.xml what
is the main class and then run as follows
bin/hadoop jar hadoop-*-examples.jar Full qualified main class grep
input output 'dfs[a-z.]+'
On Thu, Jun 16, 2011 at 10:23 AM, Drew Gross drew.a.gr...@gmail.com
wrote:
Hello,
I'm trying to run the example from the quick start guide on Windows
and I get this error:
$ bin/hadoop jar hadoop-*-examples.jar grep input output 'dfs[a-z.]+'
Exception in thread main java.lang.NoClassDefFoundError:
Caused by: java.lang.ClassNotFoundException:
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: . Program will exit.
Exception in thread main java.lang.NoClassDefFoundError:
Gross\Documents\Projects\discom\hadoop-0/21/0\logs
Caused by: java.lang.ClassNotFoundException:
Gross\Documents\Projects\discom\hadoop-0.21.0\logs
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class:
Gross\Documents\Projects\discom\hadoop-0.21.0\logs. Program will
exit.
Does anyone know what I need to change?
Thank you.
From, Drew
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