Hadoop examples cannot execute on a single-node cluster post HADOOP-1622
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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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