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Posted to yarn-issues@hadoop.apache.org by "Suma Shivaprasad (JIRA)" <ji...@apache.org> on 2018/05/15 21:10:00 UTC

[jira] [Created] (YARN-8300) Fix NPE in DefaultUpgradeComponentsFinder

Suma Shivaprasad created YARN-8300:
--------------------------------------

             Summary: Fix NPE in DefaultUpgradeComponentsFinder 
                 Key: YARN-8300
                 URL: https://issues.apache.org/jira/browse/YARN-8300
             Project: Hadoop YARN
          Issue Type: Bug
          Components: yarn
            Reporter: Suma Shivaprasad
            Assignee: Suma Shivaprasad



In current upgrades for Yarn native services, we do not support addition/deletion of compoents during upgrade. On trying to upgrade with the same number of components in target spec as the current service spec but with the one of the components having a new target spec and name, see the following NPE in service AM logs

{noformat}
2018-05-15 00:10:41,489 [IPC Server handler 0 on 37488] ERROR service.ClientAMService - Error while trying to upgrade service {} 
java.lang.NullPointerException
	at org.apache.hadoop.yarn.service.UpgradeComponentsFinder$DefaultUpgradeComponentsFinder.lambda$findTargetComponentSpecs$0(UpgradeComponentsFinder.java:103)
	at java.util.ArrayList.forEach(ArrayList.java:1257)
	at org.apache.hadoop.yarn.service.UpgradeComponentsFinder$DefaultUpgradeComponentsFinder.findTargetComponentSpecs(UpgradeComponentsFinder.java:100)
	at org.apache.hadoop.yarn.service.ServiceManager.processUpgradeRequest(ServiceManager.java:259)
	at org.apache.hadoop.yarn.service.ClientAMService.upgrade(ClientAMService.java:163)
	at org.apache.hadoop.yarn.service.impl.pb.service.ClientAMProtocolPBServiceImpl.upgradeService(ClientAMProtocolPBServiceImpl.java:81)
	at org.apache.hadoop.yarn.proto.ClientAMProtocol$ClientAMProtocolService$2.callBlockingMethod(ClientAMProtocol.java:5972)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:523)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:991)
	at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:872)
	at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:818)
	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:1682)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2678)
{noformat}



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