[jira] [Created] (YARN-9246) NPE when executing a command yarn node -status or -states without additional arguments

["Masahiro Tanaka (JIRA)" <ji...@apache.org>]

Masahiro Tanaka created YARN-9246:
-------------------------------------

             Summary: NPE when executing a command yarn node -status or -states without additional arguments
                 Key: YARN-9246
                 URL: https://issues.apache.org/jira/browse/YARN-9246
             Project: Hadoop YARN
          Issue Type: Bug
          Components: client
            Reporter: Masahiro Tanaka
            Assignee: Masahiro Tanaka


yarn node command should not print NPE even if there are some missing arguments.

{code}
ubuntu@ip-172-31-0-78:~/hadoop-3.3.0-SNAPSHOT$ ./bin/yarn node -states
Missing argument for options
usage: node
 -all Works with -list to list all nodes.
 -help Displays help for all commands.
 -list List all running nodes. Supports optional use of
 -states to filter nodes based on node state, all -all
 to list all nodes, -showDetails to display more
 details about each node.
 -showDetails Works with -list to show more details about each node.
 -states <States> Works with -list to filter nodes based on input
 comma-separated list of node states. The valid node
 state can be one of the following:
 NEW,RUNNING,UNHEALTHY,DECOMMISSIONED,LOST,REBOOTED,DEC
 OMMISSIONING,SHUTDOWN.
 -status <NodeId> Prints the status report of the node.
Exception in thread "main" java.lang.NullPointerException
 at org.apache.hadoop.yarn.client.cli.YarnCLI.stop(YarnCLI.java:75)
 at org.apache.hadoop.yarn.client.cli.NodeCLI.main(NodeCLI.java:63)
ubuntu@ip-172-31-0-78:~/hadoop-3.3.0-SNAPSHOT$ ./bin/yarn node -status
Missing argument for options
usage: node
 -all Works with -list to list all nodes.
 -help Displays help for all commands.
 -list List all running nodes. Supports optional use of
 -states to filter nodes based on node state, all -all
 to list all nodes, -showDetails to display more
 details about each node.
 -showDetails Works with -list to show more details about each node.
 -states <States> Works with -list to filter nodes based on input
 comma-separated list of node states. The valid node
 state can be one of the following:
 NEW,RUNNING,UNHEALTHY,DECOMMISSIONED,LOST,REBOOTED,DEC
 OMMISSIONING,SHUTDOWN.
 -status <NodeId> Prints the status report of the node.
Exception in thread "main" java.lang.NullPointerException
 at org.apache.hadoop.yarn.client.cli.YarnCLI.stop(YarnCLI.java:75)
 at org.apache.hadoop.yarn.client.cli.NodeCLI.main(NodeCLI.java:63)
ubuntu@ip-172-31-0-78:~/hadoop-3.3.0-SNAPSHOT$
{code}



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