java - Problem running task using log4j using Ant -

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my java application uses log4j logging. using ant project builds successfully, unable run it. error 

exception in thread "main" java.lang.noclassdeffounderror: org/apache/commons/logging/log ......... caused by: java.lang.classnotfoundexception: org.apache.commons.logging.log

my classpath contains log4j jar. 

[echo] ..../apache-log4j-1.2.15/log4j-1.2.15.jar: .....

my ant version 1.7.1. missing?

[edit] application referencing project required commons logging jar. tried creating executable jar of referenced project dependencies carried over. ant task create executable jar follows:

<target name="executablejar" depends="compile">         <delete file="${dist}/app.jar" />          <javac debug="true" srcdir="${src}" destdir="${classes}" classpath="${javac.classpath}"/>          <copy todir="classes" flatten="true">             <path>                   <pathelement path="${javac.classpath}"/>                 </path>         </copy>         <jar jarfile="${dist}/app.jar" basedir="${classes}" /> </target>

however error still persists. creating executable jar correctly?

you may have inadvertently imported class org.apache.commons.logging , now, might expect, jvm expecting find class definition on classpath @ runtime.

i'd recommend looking usages of commons-logging package in code.


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