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Posted to yarn-issues@hadoop.apache.org by "Zian Chen (JIRA)" <ji...@apache.org> on 2018/05/03 22:43:00 UTC
[jira] [Comment Edited] (YARN-8223) ClassNotFoundException when
auxiliary service is loaded from HDFS
[ https://issues.apache.org/jira/browse/YARN-8223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16463114#comment-16463114 ]
Zian Chen edited comment on YARN-8223 at 5/3/18 10:42 PM:
----------------------------------------------------------
Really appreciate [~eyang] for helping with testing the patch. To let this part easy to be used in the future. Let's add info to the doc.
was (Author: zian chen):
Really appreciate [~eyang] for helping with testing the patch. To let this part easy to be used in the future. Let's open a linked document Jira to document how to config remote path properly.
> ClassNotFoundException when auxiliary service is loaded from HDFS
> -----------------------------------------------------------------
>
> Key: YARN-8223
> URL: https://issues.apache.org/jira/browse/YARN-8223
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Charan Hebri
> Assignee: Zian Chen
> Priority: Blocker
> Attachments: YARN-8223.001.patch
>
>
> Loading an auxiliary jar from a local location on a node manager works as expected,
> {noformat}
> 2018-04-26 15:09:26,179 INFO util.ApplicationClassLoader (ApplicationClassLoader.java:<init>(98)) - classpath: [file:/grid/0/hadoop/yarn/local/aux-service-local.jar]
> 2018-04-26 15:09:26,179 INFO util.ApplicationClassLoader (ApplicationClassLoader.java:<init>(99)) - 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]
> 2018-04-26 15:09:26,181 INFO containermanager.AuxServices (AuxServices.java:serviceInit(252)) - The aux service:test_aux_local are using the custom classloader
> 2018-04-26 15:09:26,182 WARN containermanager.AuxServices (AuxServices.java:serviceInit(268)) - The Auxiliary Service named 'test_aux_local' in the configuration is for class org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxiliaryServiceWithCustomClassLoader which has a name of 'org.apache.auxtest.AuxServiceFromLocal with custom class loader'. Because these are not the same tools trying to send ServiceData and read Service Meta Data may have issues unless the refer to the name in the config.
> 2018-04-26 15:09:26,182 INFO containermanager.AuxServices (AuxServices.java:addService(103)) - Adding auxiliary service org.apache.auxtest.AuxServiceFromLocal with custom class loader, "test_aux_local"{noformat}
> But loading the same jar from a location on HDFS fails with a ClassNotFoundException.
> {noformat}
> 018-04-26 15:14:39,683 INFO util.ApplicationClassLoader (ApplicationClassLoader.java:<init>(98)) - classpath: []
> 2018-04-26 15:14:39,683 INFO util.ApplicationClassLoader (ApplicationClassLoader.java:<init>(99)) - 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]
> 2018-04-26 15:14:39,687 INFO service.AbstractService (AbstractService.java:noteFailure(267)) - Service org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices failed in state INITED
> java.lang.ClassNotFoundException: org.apache.auxtest.AuxServiceFromLocal
> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)
> 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:249)
> 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:316)
> 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:472)
> at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
> at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:918)
> at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:979)
> {noformat}
> The difference between the 2 logs is the classpath variable in the 1st line of the log is empty in the HDFS case. It doesn't have the URL/filename of the jar file specified in the config.
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