I have this jar:
/weekly/
/database.class
/report.class
/META-INF
/MANIFEST.MF
The MANIFEST.MF
Manifest-Version: 1.0
Main-Class: weekly.report
Class-Path: /root/java
In this jar i used two external jar files, postgresql-9.1-901.jdbc4.jar, javax.mail.jar. I also put those into /root/java.
but when i run it use
java -jar weekly.jar
It shows those two jars class can't find
Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/internet/AddressException
Caused by: java.lang.ClassNotFoundException: javax.mail.internet.AddressException
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
even i try to put those two jars to my $CLASSPATH
/usr/java/jdk1.6.0_21/lib:/usr/java/jdk1.6.0_21/jre/lib
It also shows same error result. I can successfully run it in my Mac, but when i try to remove it to my server CentOS system ,it shows those NoclassDefFounderror.
Finding a JAR file using a classpath is similar to finding a package
file in a classpath. The difference is that when you specify a path
for a JAR file, you must include the name of the JAR file at the end
of the path.
So you can try something like this:
java -classpath /usr/java/jdk1.6.0_21/lib/javax.mail.jar:/usr/java/jdk1.6.0_21/jre/lib/postgresql-9.1-901.jdbc4.jar -jar weekly.jar
Another option is to put your jars into jre/lib/ext (but I don't think it's a good idea)
Related
I have a project that runs fine in Eclipse. The project uses many external jars.
My file directory for the project has a bin and src directory, and a .classpath and .project files.
From this directory, if I execute:
java -cp bin com.brm.main.Demo2
I receive the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/lucene/sea
rch/Query
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at sun.launcher.LauncherHelper.getMainMethod(LauncherHelper.java:494)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:486)
Caused by: java.lang.ClassNotFoundException: org.apache.lucene.search.Query
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
... 6 more
org/apache/lucene is an external jar.
You also need to include your other dependencies on the classpath, separating classpath elements with ; on Windows or : on Linux.
On Windows:
java -cp bin;path\to\lucene.jar com.brm.main.Demo2
On Linux:
java -cp bin:path/to/lucene.jar com.brm.main.Demo2
If you have other jarfiles or directories in addition to lucene and bin, you'll have to add those, too.
If you're trying to deploy your program, a better solution is to use Eclipse's "Export" wizard to export a Runnable JAR File, which will walk you through the steps to select your main class and bundle your dependencies. Or, going even further, you can use ant or maven to build your project and create a deployable bundle.
How about trying like this:-
java -cp .;%CLASSPATH% com.brm.main.Demo2
seems like your classpath is invalid and because of that the .jars for the external libraries are not found.
I have created a jar file using the java file from this blog using following statements
javac -classpath /usr/local/hadoop/hadoop-core-1.0.3.jar -d /home/hduser/dir Dictionary.java
/usr/lib/jvm/jdk1.7.0_07/bin/jar cf Dictionary.jar /home/hduser/dir
Now i have tried running this jar in hadoop by hit and trial of various commands
1hduser#ubuntu:~$ /usr/local/hadoop/bin/hadoop jar Dictionary.jar
Output:
Warning: $HADOOP_HOME is deprecated.
RunJar jarFile [mainClass] args...
2.hduser#ubuntu:~$ /usr/local/hadoop/bin/hadoop jar Dictionary.jar Dictionary
Output:
Warning: $HADOOP_HOME is deprecated.
Exception in thread "main" java.lang.ClassNotFoundException: Dictionary
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.apache.hadoop.util.RunJar.main(RunJar.java:149)
How can i run the jar in hadoop? I have the right DFS Locations as per needed by my program.
I was able to reproduce your problem. The problem is where you are creating the jar.
Basically, the directory that you are packaging into the jar is confusing the jar file in locating the main class file. Instead if you try doing :
/usr/lib/jvm/jdk1.7.0_07/bin/jar cf Dictionary.jar /home/hduser/dir/Dictionary.class
i.e. package the class file specifically into the jar and then run:
/usr/local/hadoop/bin/hadoop jar Dictionary.jar Dictionary
It just works fine provided that you have a main function in your class called Dictionary.
The problem is when you package a full directory inside a jar then the jar also needs to be aware of the directory structure to locate the class file. For this, we need to have a well defined package hierarchy to define the class location. So, when you are packaging /home/hduser/dir/ into the jar, the jar is not aware of the location of the class file which is located deep inside this directory structure. For this you need to add a package name to your .java file according to the directory structure , for example home.hduser.dir and while running the hadoop jar command specify the class name with the package structure, for example home.hduser.dir.Dictionary.
Use the below command to run the hadoop jar file from the CLI.
hadoop jar <jarFileName> <mainClassname> <AnyCommandLineArguements>
I also ran into the same problem and the console does not show much information but just
RunJar jarFile [mainClass] args...
Please check the jar for the package folders location, as a straightforward approach please try is the package starts with com.company...
The "com" folder should be the first level folder when the jar is unpacked
i am working with Hadoop-1.0.1 in Eclipse. I am trying to run wordcount application but when i run my WordCount.java, Eclipse shows me following error
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.apache.hadoop.conf.Configuration.<clinit>(Configuration.java:143)
at test.WordCount.main(WordCount.java:56)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
... 2 more
I have hadoop-core-1.0.1.jar in my classpath. Should the application require more jar
It seems you are getting this error because either two important logging classes commons-logging-1.1.1.jar and commons-logging-api-1.0.4.jar which are related with common logging is either not available from your classpath or you just don't have it.
In most cases these files are in \lib folder with other Hadoop Jar so when you set class path these jar are accessible. Please verify that you do have these files in your machine and are set in your classpath so they are accessible.
Also when you run "hadoop version" the version comes up as result, the same hadoop-core--SNAPSHOT.jar must be in your $HADOOP_HOME location.
You mentioned that you are running WordCount.java instead you should say that you are running WordCount job because you are always using the compiled application as jar not java.
$ bin/hadoop jar /usr/jboss/wordcount.jar org.myhadoop.WordCount /usr/jboss/wordcount/input /usr/jboss/wordcount/output
hadoop-core-1.0.1 is probably not in your classpath: commons-logging is actually included several times in the hadoop jar!
It seems that you did not include the common-logging jar file so Download Here the jar file depends on version, Then will included it in your program and run it THANK yoU
I'm writing a short utility that performs a short task on a remote Oracle instance. The utility uses the Oracle jdbc driver found in ojdbc6.jar.
The Oracle jar is properly included in my classpath. When I export my project to a jar and run the jar on the command line using "java -jar ", I get:
Exception in thread "main" java.lang.ClassNotFoundException: oracle.jdbc.OracleDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at java.lang.Class.forName0(Native Method)
After moving the Oracle jar into the same directory as my runnable jar file, I changed my Manifest file to include the the Oracle jar in the classpath. This fixed the problem, and my jar ran fine.
Can anyone explain why including the Oracle jar in my classpath didn't solve the problem, and why editing the Manifest file did?
Thanks!
From Sun (Oracle) documentation for the java -jar command:
Execute a program encapsulated in a JAR file. The first argument is
the name of a JAR file instead of a startup class name. In order for
this option to work, the manifest of the JAR file must contain a line
of the form Main-Class: classname. Here, classname identifies the
class having the public static void main(String[] args) method that
serves as your application's starting point. See the Jar tool
reference page and the Jar trail of the Java Tutorial for information
about working with Jar files and Jar-file manifests. When you use this
option, the JAR file is the source of all user classes, and other user
class path settings are ignored.
I have a folder gnu\getopt contains Getopt.class which is need by ChatDemo.jar for parser argument parameters, when I ran with java -cp xSocket.jar;. ChatDemo.jar it produce:
Exception in thread "main" java.lang.NoClassDefFoundError: gnu/getopt/Getopt
at ChatDemo.main(ChatDemo.java:24)
Caused by: java.lang.ClassNotFoundException: gnu.getopt.Getopt
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 1 more
ChatDemo.java:
import gnu.getopt.Getopt;
ChatDemo Manifest:
Manifest-Version: 1.0
Created-By: 1.6.0_22 (Sun Microsystems Inc.)
Main-Class: ChatDemo
Class-Path: xSocket.jar
Run it with java -classpath "xSocket.jar;.;ChatDemo.jar ChatDemo (no .jar after the name of the main class).
Note that you must add the folder which contains "gnu" to the classpath. Another solution is to put the getopt classes in a JAR and add that to the classpath. Make sure that the folder structure (gnu\getopt) is preserved.
It looks like you are mixing up the two ways of running java. You should either supply a classpath (e.g. using the -cp argument), or launch from a JAR file. You cannot do both.
If you launch using a JAR file, the -cp argument is ignored. In that case, you must specify the complete classpath in the JAR file's manifest.
The manifest in the ChatDemo.jar file apparently doesn't include. You can remedy this in two ways:
Update the manifest classpath to be "Class-path: xSocket.jar ." ... note we use a space to separate the entries here, not ; or :.
Add Getopt.class to the JAR file as gnu/getopt/Getopt.class.
However, if you launch using a JAR file you have to use the -jar option. If you try to your application like this:
java -cp xSocket.jar;. ChatDemo.jar
it will fail telling you that it cannot find a class called ChatDemo.jar ; i.e. it will misinterpret the JAR filename as a qualified classname.
Add Main-Class - as fully qualified (I mean as per package structure) class name of your class which contains main method.