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https://issues.apache.org/jira/browse/HAMA-431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13124894#comment-13124894
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Thomas Jungblut commented on HAMA-431:
--------------------------------------
I have a problem launching the APP master.
I'm putting the classpath together via suggested code:
{noformat}
// Assuming our classes or jars are available as local resources in the
// working directory from which the command will be run, we need to append
// "." to the path.
// By default, all the hadoop specific classpaths will already be available
// in $CLASSPATH, so we should be careful not to overwrite it.
String classPathEnv = "$CLASSPATH:./*:";
env.put("CLASSPATH", classPathEnv);
amContainer.setEnvironment(env);
{noformat}
The app master gets started with following start command:
{noformat}
Start command: ${JAVA_HOME}/bin/java -cp $CLASSPATH:./*:
org.apache.hama.bsp.BSPApplicationMaster
file:/home/thomasjungblut/Desktop/application_1318323647317_0012/job.xml
1><LOG_DIR>/stdout 2><LOG_DIR>/stderr
{noformat}
Which is correct, assuming that $CLASSPATH has been set properly by YARN.
But I think that it is not:
{noformat}
11/10/11 11:37:03 INFO ipc.YarnRPC: Creating YarnRPC for
org.apache.hadoop.yarn.ipc.HadoopYarnProtoRPC
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/avro/ipc/Server
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.apache.hadoop.yarn.ipc.YarnRPC.create(YarnRPC.java:53)
at
org.apache.hama.bsp.BSPApplicationMaster.<init>(BSPApplicationMaster.java:104)
at
org.apache.hama.bsp.BSPApplicationMaster.main(BSPApplicationMaster.java:233)
Caused by: java.lang.ClassNotFoundException: org.apache.avro.ipc.Server
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 5 more
{noformat}
Is there a suggestion on how to solve this?
FYI, I'm submitting the dummy job via "yarn/bin/yarn jar xyz.jar". The
generated start command contains all the jars that should be needed. So
classpath should be set properly.
> MapReduce NG integration
> ------------------------
>
> Key: HAMA-431
> URL: https://issues.apache.org/jira/browse/HAMA-431
> Project: Hama
> Issue Type: New Feature
> Reporter: Thomas Jungblut
> Assignee: Thomas Jungblut
> Attachments: job_state.dot, task_phase.dot, task_state.dot
>
>
> We should take a look at how to integrate Hama's BSP Engine to Hadoop's
> nextGen application platform.
> Can be currently found in the 0.23 branch.
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