[YARN-10314] YarnClient throws NoClassDefFoundError for WebSocketException with only shaded client jars

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.3.0
• Component/s: yarn
• Hadoop Flags: Reviewed
• Assignee: Vinayakumar B
• Reporter: Vinayakumar B
• Created: 12/Jun/20 18:56
• Updated: 11/Jan/22 16:30
• Resolved: 17/Jun/20 04:03

Description

After YARN-8778, with only shaded hadoop client jars in classpath Unable to submit job.

CC: ayushtkn confirmed the same. Hive 4.0 does not work due to this, shaded client is necessary there to avoid guava jar's conflicts.

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/shaded/org/eclipse/jetty/websocket/api/WebSocketException
	at org.apache.hadoop.yarn.client.api.YarnClient.createYarnClient(YarnClient.java:92)
	at org.apache.hadoop.mapred.ResourceMgrDelegate.<init>(ResourceMgrDelegate.java:109)
	at org.apache.hadoop.mapred.YARNRunner.<init>(YARNRunner.java:153)
	at org.apache.hadoop.mapred.YarnClientProtocolProvider.create(YarnClientProtocolProvider.java:34)
	at org.apache.hadoop.mapreduce.Cluster.initialize(Cluster.java:130)
	at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:109)
	at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:102)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1545)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1541)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1845)
	at org.apache.hadoop.mapreduce.Job.connect(Job.java:1541)
	at org.apache.hadoop.mapreduce.Job.submit(Job.java:1570)
	at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1594)
	at org.apache.hadoop.examples.WordCount.main(WordCount.java:87)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.shaded.org.eclipse.jetty.websocket.api.WebSocketException
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	... 16 more

Issue Links

• relates to: YARN-10472 Backport YARN-10314 to branch-3.2
• links to: Github PR