InputFormat used in job must be in JobTracker classpath (not loaded from job
JAR)
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Key: NUTCH-191
URL: http://issues.apache.org/jira/browse/NUTCH-191
Project: Nutch
Type: Bug
Versions: 0.8-dev
Environment: ~20 node nutch mapreduce environment, running SVN trunk, on Linux
Reporter: Bryan Pendleton
Priority: Minor
During development, I've been creating/tweaking custom InputFormat
implementations. However, when you try to run a job against a running cluster,
you get:
Exception in thread "main" java.io.IOException: java.lang.RuntimeException:
java.lang.RuntimeException: java.lang.ClassNotFoundException:
my.custom.InputFormat
at org.apache.nutch.ipc.Client.call(Client.java:294)
at org.apache.nutch.ipc.RPC$Invoker.invoke(RPC.java:127)
at $Proxy0.submitJob(Unknown Source)
at org.apache.nutch.mapred.JobClient.submitJob(JobClient.java:259)
at org.apache.nutch.mapred.JobClient.runJob(JobClient.java:288)
at com.parc.uir.wikipedia.WikipediaJob.main(WikipediaJob.java:85)
This error goes away if I restart the TaskTrackers/JobTracker with a classpath
which includes the needed code. Other classes (Mapper, Reducer) appear to be
available out of the jar file specified in the JobConf, but not the
InputFormat. Obviously, it's less than idea to have to restart the JobTracker
whenever there's a change to a job-specific class.
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