Hiroyuki Adachi created YARN-11030:
--------------------------------------
Summary: ClassNotFoundException when aux service class is loaded
from customized classpath
Key: YARN-11030
URL: https://issues.apache.org/jira/browse/YARN-11030
Project: Hadoop YARN
Issue Type: Bug
Affects Versions: 3.3.1, 3.3.0
Reporter: Hiroyuki Adachi
NodeManager failed to load the aux service with ClassNotFoundException while
loading the class from the customized classpath.
{noformat}
<configuration>
<property name="yarn.nodemanager.aux-services" value="spark_shuffle"/>
<property name="yarn.nodemanager.aux-services.spark_shuffle.class"
value="org.apache.spark.network.yarn.YarnShuffleService"/>
<property name="yarn.nodemanager.aux-services.spark_shuffle.classpath"
value="/tmp/spark-3.1.2-yarn-shuffle.jar"/>
<!-- Note that the spark_shuffle classpath is not included in
HADOOP_CLASSPATH and yarn.application.classpath. -->
</configuration> {noformat}
{noformat}
2021-12-06 15:32:09,168 INFO org.apache.hadoop.util.ApplicationClassLoader:
classpath: [file:/tmp/spark-3.1.2-yarn-shuffle.jar]
2021-12-06 15:32:09,168 INFO org.apache.hadoop.util.ApplicationClassLoader:
system classes: [org.apache.spark.network.yarn.YarnShuffleService]
2021-12-06 15:32:09,169 INFO org.apache.hadoop.service.AbstractService: Service
org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices failed in
state INITED
org.apache.hadoop.yarn.exceptions.YarnRuntimeException:
java.lang.ClassNotFoundException:
org.apache.spark.network.yarn.YarnShuffleService
at
org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices.initAuxService(AuxServices.java:482)
at
org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices.serviceInit(AuxServices.java:761)
at
org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
at
org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:109)
at
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.serviceInit(ContainerManagerImpl.java:327)
at
org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
at
org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:109)
at
org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:494)
at
org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
at
org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:962)
at
org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:1042)
Caused by: java.lang.ClassNotFoundException:
org.apache.spark.network.yarn.YarnShuffleService
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
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.ja
va:165)
at
org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices.createAuxServiceFromLocalClasspath(AuxServices.java:242)
at
org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices.createAuxService(AuxServices.java:271)
at
org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices.initAuxService(AuxServices.java:452)
... 10 more
2021-12-06 15:32:09,172 INFO org.apache.hadoop.service.AbstractService: Service
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl
failed in state INITED{noformat}
YARN-9075 may cause this problem. The default system classes were changed by
this patch.
Before YARN-9075: isSystemClass() returns false since the system classes does
not contain the aux service class itself, and the class will be loaded from the
customized classpath.
[https://github.com/apache/hadoop/blob/rel/release-3.3.1/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ApplicationClassLoader.java#L176]
{noformat}
2021-12-06 15:50:21,332 INFO org.apache.hadoop.util.ApplicationClassLoader:
classpath: [file:/tmp/spark-3.1.2-yarn-shuffle.jar]
2021-12-06 15:50:21,332 INFO org.apache.hadoop.util.ApplicationClassLoader:
system classes: [java., javax.accessibility., -javax.activation.,
javax.activity., j
avax.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., j
avax.sound., javax.sql., javax.swing., javax.tools., javax.transaction.,
-javax.xml.registry., -javax.xml.rpc., javax.xml., org.w3c.dom., org.xml.sax.,
org.apac
he.commons.logging., org.apache.log4j., -org.apache.hadoop.hbase.,
org.apache.hadoop., core-default.xml, hdfs-default.xml, mapred-default.xml,
yarn-default.xml]
{noformat}
After YARN-9075: isSystemClass() returns true and the parent classloader will
be used. It does not know the customized classpath and throws the
ClassNotFoundException.
[https://github.com/apache/hadoop/blob/rel/release-3.3.1/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ApplicationClassLoader.java#L189]
{noformat}
2021-12-06 15:32:09,168 INFO org.apache.hadoop.util.ApplicationClassLoader:
classpath: [file:/tmp/spark-3.1.2-yarn-shuffle.jar]
2021-12-06 15:32:09,168 INFO org.apache.hadoop.util.ApplicationClassLoader:
system classes: [org.apache.spark.network.yarn.YarnShuffleService]{noformat}
workaround: set dummy system-classes so that isSystemClass() returns false.
{noformat}
<configuration>
<property name="yarn.nodemanager.aux-services.spark_shuffle.system-classes"
value="dummy"/>
</configuration>{noformat}
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