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running pig from eclipse on hadoop cluster
Hi,

I am currently running pig from eclipse on hadoop cluster.
I added the hadoop conf location to the runtime configuration.
But the mapreduce jobs failed as the built class files of pig cannot be
called by hadoop.
I added class file location to the classpath, but it did not work.
Any hints?

java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:866)
at org.apache.hadoop.mapreduce.JobContext.getOutputFormatClass(JobContext.java:231)
at org.apache.hadoop.mapred.Task.initialize(Task.java:488)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:352)
at org.apache.hadoop.mapred.Child$4.run(Child.java:259)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
at org.apache.hadoop.mapred.Child.main(Child.java:253)
Caused by: java.lang.ClassNotFoundException: org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:819)
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:864)
... 8 more
Best,
Weiping
+
Weiping Qu 2013-06-10, 21:14