Charan Hebri created YARN-8223:
----------------------------------
Summary: 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
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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