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https://issues.apache.org/jira/browse/YARN-9967?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Prabhu Joseph reassigned YARN-9967:
-----------------------------------
Assignee: Tarun Parimi
> 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
> Assignee: Tarun Parimi
> Priority: Major
>
> 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</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}
>
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