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POjava.lang.ClassNotFoundException when running java -jar
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1795452
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2009-11-25T08:29:26.823
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2018-05-08T15:43:05.307
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text
Body
I'm using ant to build my <code>build.xml</code> file, it compiles ok, but then getting a runtime <code>java.lang.NoClassDefFoundError</code> when running the resulting jar via "<code>java -jar my_jar.jar</code>". It seems like this comes up a lot but none of the related questions' solutions worked for me. My classpath for <code>javac</code> contains only "<code>/usr/local/lib/libthrift.jar</code>" and the main <code>.java</code> file imports a bunch of thrift packages such as <code>org.apache.thrift.transport.TTransportException</code>. When I try running the program via: <pre><code>java -jar MyClass.jar </code></pre> , I get the error: <pre><code>Exception in thread "main" **java.lang.NoClassDefFoundError**: org/apache/thrift/transport/TTransportException Caused by: java.lang.ClassNotFoundException: org.apache.thrift.transport.TTransportException at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) Could not find the main class: **MyClass**. Program will exit. </code></pre> Here are the things I've tried so far that don't work: <ul> <li>adding a flag on the command line like "java <code>-cp /usr/local/lib/libthrift.jar</code> <code>-jar my_jar.jar</code>", the result is the same error as above</li> <li>adding <code>&lt;attribute name="Class-Path" value="./:/usr/local/lib/libthrift.jar"/></code> inside my jar's <code>manifest></code> tag, the result is the same error as above</li> <li>adding <code>-Xbootclasspath/a:/usr/local/lib/libthrift.jar:./</code> to the java command line. it solves the first error but a different error comes up: Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Logger at org.apache.thrift.transport.TServerSocket.<clinit>(TServerSocket.java:36) at MyClass.start(Unknown Source) at MyClass.main(Unknown Source)</li> </ul> EDIT: If I comment out the code that instantiates the missing classes but leave the imports, the code executes fine. EDIT: I moved my java classes to a server and referenced the MainClass with the server in the manifest attribute, but that didn't fix anything.
Tags
<java><ant><build.xml>
Title
java.lang.ClassNotFoundException when running java -jar
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1. USHeinrich Schmetterling
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1. COJust added the Class-Path section of the MANIFEST in my answer. I just saw James B's answer, so if this work, you could select his answer as the official one.
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 POjava.lang.ClassNotFoundException when running java -jar
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