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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-2107) Hadoop examples cannot execute on a single-node cluster post HADOOP-1622
Date Fri, 26 Oct 2007 11:58:51 GMT
Hadoop examples cannot execute on a single-node cluster post HADOOP-1622
------------------------------------------------------------------------

                 Key: HADOOP-2107
                 URL: https://issues.apache.org/jira/browse/HADOOP-2107
             Project: Hadoop
          Issue Type: Bug
          Components: mapred
    Affects Versions: 0.16.0
            Reporter: Arun C Murthy
            Priority: Blocker
             Fix For: 0.16.0


All hadoop examples on single-node  cluster, post HADOOP-1622, fail with:

{noformat}
Running 10 maps.
Job started: Fri Oct 26 17:23:51 IST 2007
07/10/26 17:23:51 WARN mapred.JobClient: No job jar file set.  User classes may not be found.
See JobConf(Class) or JobConf#setJar(String).
07/10/26 17:23:52 INFO mapred.JobClient: Running job: job_200710261722_0001
07/10/26 17:23:53 INFO mapred.JobClient:  map 0% reduce 0%
07/10/26 17:24:07 INFO mapred.JobClient: Task Id : task_200710261722_0001_m_000000_0, Status
: FAILED
java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException:
org.apache.hadoop.examples.RandomWriter$RandomInputFormat
	at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:576)
	at org.apache.hadoop.mapred.JobConf.getInputFormat(JobConf.java:512)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:156)
	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1936)
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.RandomWriter$RandomInputFormat
	at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:544)
	at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:568)
	... 3 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.RandomWriter$RandomInputFormat
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:242)
	at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:524)
	at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:542)
	... 4 more
{noformat}

The examples work once I reverted the HADOOP-1622 patch.

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