hadoop-yarn-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Prabhu Joseph (Jira)" <j...@apache.org>
Subject [jira] [Created] (YARN-9967) Fix NodeManager failing to start when Hdfs Auxillary Jar is set
Date Tue, 12 Nov 2019 13:11:00 GMT
Prabhu Joseph created YARN-9967:
-----------------------------------

             Summary: Fix NodeManager failing to start when Hdfs Auxillary Jar is set
                 Key: YARN-9967
                 URL: https://issues.apache.org/jira/browse/YARN-9967
             Project: Hadoop YARN
          Issue Type: Bug
          Components: auxservices, nodemanager
    Affects Versions: 3.3.0
            Reporter: Prabhu Joseph


Loading an auxiliary jar from a Hdfs location on a node manager fails with ClassNotFound Exception
{code:java}
2019-11-08 03:59:49,256 INFO org.apache.hadoop.util.ApplicationClassLoader: classpath: []
2019-11-08 03:59:49,256 INFO org.apache.hadoop.util.ApplicationClassLoader: system classes:
[java., javax.accessibility., javax.activation., javax.activity., javax.annotation., javax.annotation.processing.,
javax.crypto., javax.imageio., javax.jws., javax.lang.model., -javax.management.j2ee., javax.management.,
javax.naming., javax.net., javax.print., javax.rmi., javax.script., -javax.security.auth.message.,
javax.security.auth., javax.security.cert., javax.security.sasl., javax.sound., javax.sql.,
javax.swing., javax.tools., javax.transaction., -javax.xml.registry., -javax.xml.rpc., javax.xml.,
org.w3c.dom., org.xml.sax., org.apache.commons.logging., org.apache.log4j., -org.apache.hadoop.hbase.,
org.apache.hadoop., core-default.xml, hdfs-default.xml, mapred-default.xml, yarn-default.xml]
2019-11-08 03:59:49,257 INFO org.apache.hadoop.service.AbstractService: Service org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices
failed in state INITED
java.lang.ClassNotFoundException: org.apache.auxtest.AuxServiceFromHDFS
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.apache.hadoop.util.ApplicationClassLoader.loadClass(ApplicationClassLoader.java:189)
	at org.apache.hadoop.util.ApplicationClassLoader.loadClass(ApplicationClassLoader.java:157)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxiliaryServiceWithCustomClassLoader.getInstance(AuxiliaryServiceWithCustomClassLoader.java:169)
	at org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices.serviceInit(AuxServices.java:270)
	at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
	at org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:108)
	at org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.serviceInit(ContainerManagerImpl.java:321)
	at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
	at org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:108)
	at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:478)
	at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
	at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:936)
	at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:1016)
{code}
*Repro:*
{code:java}
1. Prepare a custom auxiliary service jar and place it on hdfs

[hdfs@yarndocker-1 yarn]$ cat TestShuffleHandler2.java 
package org;
import org.apache.hadoop.yarn.server.api.AuxiliaryService;
import org.apache.hadoop.yarn.server.api.ApplicationInitializationContext;
import org.apache.hadoop.yarn.server.api.ApplicationTerminationContext;
import java.nio.ByteBuffer;

public class TestShuffleHandler2 extends AuxiliaryService {
    public static final String MAPREDUCE_TEST_SHUFFLE_SERVICEID = "test_shuffle2";
    public TestShuffleHandler2() {
      super("testshuffle2");
    }
    @Override
    public void initializeApplication(ApplicationInitializationContext context) {
    }
    @Override
    public void stopApplication(ApplicationTerminationContext context) {
    }
    @Override
    public synchronized ByteBuffer getMetaData() {
      return ByteBuffer.allocate(0); 
    }
  }
  
[hdfs@yarndocker-1 yarn]$ javac -d . -cp `hadoop classpath` TestShuffleHandler2.java 
[hdfs@yarndocker-1 yarn]$ jar cvf auxhdfs.jar org/
[hdfs@yarndocker-1 mapreduce]$ hadoop fs -mkdir /AUX
[hdfs@yarndocker-1 mapreduce]$ hadoop fs -put /tmp/auxhdfs.jar /AUX
[hdfs@yarndocker-1 mapreduce]$ hadoop fs -chmod 777 /AUX
[hdfs@yarndocker-1 mapreduce]$ hadoop fs -chmod 600 /AUX/auxhdfs.jar
[hdfs@yarndocker-1 mapreduce]$ hadoop fs -chown -R yarn:hadoop  /AUX

2. Configure YARN NodeManager (yarn-site.xml) to pick from Hdfs

      <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>auxhdfs</value>
      </property>

      <property>
        <name>yarn.nodemanager.aux-services.auxhdfs.class&lt;/name>
        <value>org.TestShuffleHandler2</value>
      </property>
	  	  
      <property>
        <name>yarn.nodemanager.aux-services.auxhdfs.remote-classpath</name>
        <value>/AUX/auxhdfs.jar</value>
      </property>

{code}
 
 YARN-9965 issue is applicable for branch-3.2 and trunk (with yarn.nodemanager.aux-services.auxhdfs.system-classes
configured) where NM runs fine on first time and not on subsequent restart.

This issue is applicable for trunk where NM fails to start any attempt without yarn.nodemanager.aux-services.auxhdfs.system-classes.
This was an optional config in branch-3.2. YARN-9075 has set the configured custom class as
a system class by default which caused the ClassNotFoundException as this class won't be in
system class loader.

AuxServices#getSystemClasses has to return Null if not configured 
{code:java}
  private static String[] getSystemClasses(AuxServiceRecord service, String
      className) {
    AuxServiceConfiguration serviceConf =
        service.getConfiguration();
    if (serviceConf != null && serviceConf.getProperty(SYSTEM_CLASSES) != null) {
      return StringUtils.split(serviceConf.getProperty(SYSTEM_CLASSES));
    }
    return null;
  }
{code}
 



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: yarn-dev-unsubscribe@hadoop.apache.org
For additional commands, e-mail: yarn-dev-help@hadoop.apache.org


Mime
View raw message