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POClassNotFoundException build through maven
 

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    <p>I am using maven to build my project. I wanted to create assembly jar including some of the dependencies, so I wrote my custom assembly descriptor.</p> <p>POM.XML</p> <pre><code>&lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;groupId&gt;com.guavus&lt;/groupId&gt; &lt;artifactId&gt;Exporter&lt;/artifactId&gt; &lt;version&gt;atlas2.1&lt;/version&gt; &lt;packaging&gt;jar&lt;/packaging&gt; &lt;name&gt;Exporter&lt;/name&gt; &lt;url&gt;http://maven.apache.org&lt;/url&gt; &lt;properties&gt; &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt; &lt;aspectj.version&gt;1.6.10&lt;/aspectj.version&gt; &lt;org.springframework.version&gt;3.0.5.RELEASE&lt;/org.springframework.version&gt; &lt;/properties&gt; &lt;build&gt; &lt;plugins&gt; &lt;plugin&gt; &lt;artifactId&gt;maven-assembly-plugin&lt;/artifactId&gt; &lt;configuration&gt; &lt;archive&gt; &lt;manifest&gt; &lt;mainClass&gt;com.guavus.exporter.Exporter&lt;/mainClass&gt; &lt;/manifest&gt; &lt;/archive&gt; &lt;descriptors&gt; &lt;descriptor&gt;/Users/archit.thakur/Documents/Code_dev_cdn_mapreduce/exporter/src/main/configurator.xml&lt;/descriptor&gt; &lt;/descriptors&gt; &lt;!-- &lt;descriptorRefs&gt; &lt;descriptorRef&gt;jar-with-dependencies&lt;/descriptorRef&gt; &lt;/descriptorRefs&gt; --&gt; &lt;finalName&gt;Exporter-${project.version}&lt;/finalName&gt; &lt;appendAssemblyId&gt;false&lt;/appendAssemblyId&gt; &lt;/configuration&gt; &lt;executions&gt; &lt;execution&gt; &lt;id&gt;make-assembly&lt;/id&gt; &lt;phase&gt;package&lt;/phase&gt; &lt;goals&gt; &lt;goal&gt;single&lt;/goal&gt; &lt;/goals&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;artifactId&gt;maven-jar-plugin&lt;/artifactId&gt; &lt;version&gt;2.3.1&lt;/version&gt; &lt;executions&gt; &lt;execution&gt; &lt;id&gt;default-jar&lt;/id&gt; &lt;phase&gt;none&lt;/phase&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;/plugins&gt; &lt;/build&gt; &lt;dependencies&gt; &lt;!-- local snapshots --&gt; &lt;dependency&gt; &lt;groupId&gt;com.guavus&lt;/groupId&gt; &lt;artifactId&gt;CubeCreator&lt;/artifactId&gt; &lt;version&gt;atlas2.1&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.guavus&lt;/groupId&gt; &lt;artifactId&gt;ConcurrentFlows&lt;/artifactId&gt; &lt;version&gt;atlas2.1&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.aspectj&lt;/groupId&gt; &lt;artifactId&gt;aspectjrt&lt;/artifactId&gt; &lt;version&gt;1.6.11&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;ps&lt;/groupId&gt; &lt;artifactId&gt;thriftGenerated&lt;/artifactId&gt; &lt;version&gt;atlas2.1&lt;/version&gt; &lt;/dependency&gt; &lt;!-- local snapshots --&gt;&lt;!-- local 3rd Party --&gt; &lt;dependency&gt; &lt;groupId&gt;apache&lt;/groupId&gt; &lt;artifactId&gt;libthrift&lt;/artifactId&gt; &lt;version&gt;0.5.0&lt;/version&gt; &lt;/dependency&gt; &lt;!-- local 3rd Party --&gt;&lt;!-- remote 3rd Party --&gt; &lt;dependency&gt; &lt;groupId&gt;org.apache.hadoop&lt;/groupId&gt; &lt;artifactId&gt;hadoop-core&lt;/artifactId&gt; &lt;version&gt;0.20.203.0&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.google.code.gson&lt;/groupId&gt; &lt;artifactId&gt;gson&lt;/artifactId&gt; &lt;version&gt;1.7.1&lt;/version&gt; &lt;/dependency&gt; &lt;!-- remote 3rd Party --&gt;&lt;!-- test libs --&gt;&lt;!-- test libs --&gt; &lt;dependency&gt; &lt;groupId&gt;org.aspectj&lt;/groupId&gt; &lt;artifactId&gt;aspectjrt&lt;/artifactId&gt; &lt;version&gt;1.6.11&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;log4j&lt;/groupId&gt; &lt;artifactId&gt;log4j&lt;/artifactId&gt; &lt;version&gt;1.2.16&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.slf4j&lt;/groupId&gt; &lt;artifactId&gt;slf4j-api&lt;/artifactId&gt; &lt;version&gt;1.7.2&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;ch.qos.logback&lt;/groupId&gt; &lt;artifactId&gt;logback-access&lt;/artifactId&gt; &lt;version&gt;1.0.1&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;ch.qos.logback&lt;/groupId&gt; &lt;artifactId&gt;logback-classic&lt;/artifactId&gt; &lt;version&gt;1.0.1&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;ch.qos.logback&lt;/groupId&gt; &lt;artifactId&gt;logback-core&lt;/artifactId&gt; &lt;version&gt;1.0.1&lt;/version&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;/project&gt; </code></pre> <p>DESCRIPTOR:</p> <pre><code>&lt;assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd"&gt; &lt;id&gt;dep&lt;/id&gt; &lt;formats&gt; &lt;format&gt;jar&lt;/format&gt; &lt;/formats&gt; &lt;dependencySets&gt; &lt;dependencySet&gt; &lt;scope&gt;runtime&lt;/scope&gt; &lt;unpack&gt;true&lt;/unpack&gt; &lt;useProjectArtifact&gt;true&lt;/useProjectArtifact&gt; &lt;includes&gt; &lt;include&gt;log4j:log4j&lt;/include&gt; &lt;include&gt;org.slf4j:slf4j-api&lt;/include&gt; &lt;include&gt;ch.qos.logback:logback-access&lt;/include&gt; &lt;include&gt;ch.qos.logback:logback-classic&lt;/include&gt; &lt;include&gt;ch.qos.logback:logback-core&lt;/include&gt; &lt;include&gt;com.guavus:Exporter&lt;/include&gt; &lt;/includes&gt; &lt;/dependencySet&gt; &lt;/dependencySets&gt; &lt;/assembly&gt; </code></pre> <p>The problem is, It is creating jar having classes at directory structure like "Exporter-atlas2.1//". For example, "Exporter-atlas2.1/ch/qos/logback/classic/util/EnvUtil.class". Thats why, it throws, ClassNotFoundException at the runtime. I was expecting classes to be present at "/",For eg. "ch/qos/logback/classic/util/EnvUtil.class". </p>
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