RE: ClassNotFoundException while running quick start guide on Windows.
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 -- Forget the environment. Print this e-mail immediately. Then burn it. -- Forget the environment. Print this e-mail immediately. Then burn it.
Re: ClassNotFoundException while running quick start guide on Windows.
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 -- Forget the environment. Print this e-mail immediately. Then burn it.
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 -- Forget the environment. Print this e-mail immediately. Then burn it. -- Forget the environment. Print this e-mail immediately. Then burn it.
