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POGetting class not found exception while running giraph job in my project
 

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  1. POGetting class not found exception while running giraph job in my project
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    <p>I wrote my own Computation (MergeComputation). When I run my project on single node I am getting error java.lang.ClassNotFoundException.</p> <p>The is how I am loading:</p> <pre><code>GiraphConfiguration conf = new GiraphConfiguration(); conf.setComputationClass(MergeComputation.class); </code></pre> <p>I tried all possible things:</p> <pre><code>bin/hadoop jar contrail-1.0-SNAPSHOT-job.jar contrail.GraphMerge giraphIn giraphout 2 -libjars myproject.jar,giraph-1.1.0-SNAPSHOT-for-hadoop-1.0.2-jar-with-dependencies.jar </code></pre> <p>My HADOOP_CLASSPATH:</p> <pre><code>/Users/vidyasagar/Documents/hadoop-1.1.2/libexec/../giraph-1.1.0-SNAPSHOT-for-hadoop-1.0.2-jar-with-dependencies.jar:/Users/vidyasagar/Documents/hadoop-1.1.2/libexec/../myProject.jar </code></pre> <p>I am getting following error</p> <pre><code>java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: contrail.MergeComputation at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:881) at org.apache.giraph.conf.ClassConfOption.get(ClassConfOption.java:108) at org.apache.giraph.utils.ConfigurationUtils.getTypesHolderClass(ConfigurationUtils.java:144) at org.apache.giraph.conf.GiraphTypes.readFrom(GiraphTypes.java:97) at org.apache.giraph.conf.GiraphClasses.&lt;init&gt;(GiraphClasses.java:155) at org.apache.giraph.conf.ImmutableClassesGiraphConfiguration.&lt;init&gt;(ImmutableClassesGiraphConfiguration.java:99) at org.apache.giraph.bsp.BspOutputFormat.getOutputCommitter(BspOutputFormat.java:56) at org.apache.hadoop.mapred.Task.initialize(Task.java:515) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:353) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149) at org.apache.hadoop.mapred.Child.main(Child.java:249) Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: contrail.MergeComputation at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:849) at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:873) ... 13 more Caused by: java.lang.ClassNotFoundException: contrail.MergeComputation at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:802) at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:847) ... 14 more </code></pre> <p>can some one please help me.</p>
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    1. USericson
    1. USuser2692812
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    1. COWhich jar have you packaged your `contrail.MergeComputation` into? Make sure it is included in `-libjars` arguments.
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      1. POGetting class not found exception while running giraph job in my project
      1. USericson
    2. COcontrail.MergeComputation is in contrail-1.0-SNAPSHOT-job.jar and I am running command bin/hadoop jar contrail-1.0-SNAPSHOT-job.jar contrail.GraphMerge giraphIn giraphout 2 -libjars contrail-1.0-SNAPSHOT-job.jar,giraph-1.1.0-SNAPSHOT-for-hadoop-1.0.2-jar-with-dependencies.jar
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      1. POGetting class not found exception while running giraph job in my project
      1. USuser2692812
    3. COYou can just try this once: `GiraphConfiguration conf = new GiraphConfiguration(getConf());`
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      1. POGetting class not found exception while running giraph job in my project
      1. USachyut
 

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