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Posted to common-dev@hadoop.apache.org by "Suma Shivaprasad (JIRA)" <ji...@apache.org> on 2018/05/15 21:07:00 UTC
[jira] [Created] (HADOOP-15472) Fix NPE in DefaultUpgradeComponentsFinder

Suma Shivaprasad created HADOOP-15472:
-----------------------------------------

             Summary: Fix NPE in DefaultUpgradeComponentsFinder 
                 Key: HADOOP-15472
                 URL: https://issues.apache.org/jira/browse/HADOOP-15472
             Project: Hadoop Common
          Issue Type: Bug
            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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