NoClassDefFoundError at runtime with ant
Well, I am trying to set up a project using Ant and this is what I get:
D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis\src\lib>dir
Volume in drive D is WinMedia
Volume Serial Number is 8ED9-B662
Directory of D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis\src\lib
2012.11.20 16:11 <DIR> .
2012.11.20 16:11 <DIR> ..
2012.10.16 22:03 315.805 commons-lang3-3.1.jar
2012.10.23 23:08 176.897 commons-validator-1.4.0.jar
2012.11.20 15:30 <DIR> hibernate
2012.11.16 04:48 253.160 junit-4.10.jar
2012.10.22 02:02 489.883 log4j-1.2.17.jar
2012.10.31 23:00 1.581.066 mockito-all-1.9.5.jar
2012.11.02 19:54 651.643 mybatis-3.1.1.jar
2012.11.01 04:37 832.960 mysql-connector-java-5.1.22-bin.jar
7 File(s) 4.301.414 bytes
3 Dir(s) 7.277.907.968 bytes free
D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis\src\lib>cd ../..
D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis>
D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis>
D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis>ant run
Buildfile: D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis\build.xml
init:
compile:
[javac] Compiling 1 source file to D:\Dropbox\EclipseWorkspace\PIRS_Arturas_
Masaitis\build
jar:
[jar] Building jar: D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis\dist
\jar\PIRS_Arturas_Masaitis.jar
run:
[java] Exception in thread "main" java.lang.NoClassDefFoundError: org/apach
e/log4j/Logger
[java] at com.nortal.pirs.userinterface.fakestarter.FakeUserInterface.<
init>(Unknown Source)
[java] at com.nortal.pirs.userinterface.fakestarter.FakeUserInterface.m
ain(Unknown Source)
[java] Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger
[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
[java] at java.security.AccessController.doPrivileged(Native Method)
[java] at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
[java] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
[java] ... 2 more
[java] Java Result: 1
BUILD SUCCESSFUL
Total time: 2 seconds
D:\Dropbox\EclipseWorkspace\PIRS_Arturas_Masaitis>
Ok first you can see that I have log4j in src / lib folder and in the second part you can see that it was not found at runtime. Quite strange, because it compiles fine, it just can't find it at runtime.
My build.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project name="PIRS" default="dist" basedir=".">
<description>PIRS Arturas Masaitis</description>
<property name="src" location="src"/>
<property name="build" location="build"/>
<property name="dist" location="dist"/>
<property name="lib.dir" location="src/lib"/>
<path id="classpath">
<fileset dir="${lib.dir}" includes="**/*.jar"/>
<fileset dir="${lib.dir}" includes="*.jar"/>
</path>
<target name="init">
<mkdir dir="${build}"/>
</target>
<target name="compile" depends="init">
<javac includeantruntime="false" srcdir="${src}" destdir="${build}">
<classpath>
<path refid="classpath"/>
</classpath>
</javac>
</target>
<target name="jar" depends="compile" description="generate the jar">
<mkdir dir="${dist}/jar"/>
<jar destfile="${dist}/jar/PIRS_Arturas_Masaitis.jar" basedir="${build}">
<manifest>
<attribute name="Main-Class" value="com.nortal.pirs.userinterface.fakestarter.FakeUserInterface"/>
</manifest>
</jar>
</target>
<target name="clean" description="clean up" >
<delete dir="${build}"/>
<delete dir="${dist}"/>
</target>
<target name="run" depends="jar">
<java jar="${dist}/jar/PIRS_Arturas_Masaitis.jar" fork="true">
<classpath refid="classpath"/>
</java>
</target>
</project>
The string doesn't actually change anything.
Well, any ideas on this? Thanks in advance.
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You runjava -jar ...
-classpath ...
into a common problem here: when you run something with a command , the property is discarded. ... The reason is security (Jar files can be digitally signed to ensure they haven't been modified, and it would be so easy to make java
another Jar load a dependency with the same content, but with the functionality captured).
The solution is simple: add the attribute Class-Path: ...
to your file MANIFEST.MF
as you did with Main-Class: ...
.
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