[KNOX-501] Avoid NPE , in case of passing invalid argument to KnoxCli.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.6.0
• Assignee: J.Andreina
• Reporter: J.Andreina
• Created: 12/Feb/15 10:09
• Updated: 28/Mar/19 14:13
• Resolved: 12/Feb/15 15:44

Description

Proper Error message should be displayed , incase of passing invalid argument to KnoxCli , instead of throwing NPE.

# ./knoxcli.sh --cluster clusterName1
java.lang.NullPointerException
        at org.apache.hadoop.gateway.util.KnoxCLI.run(KnoxCLI.java:92)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.hadoop.gateway.util.KnoxCLI.main(KnoxCLI.java:669)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.gateway.launcher.Invoker.invokeMainMethod(Invoker.java:70)
        at org.apache.hadoop.gateway.launcher.Invoker.invoke(Invoker.java:39)
        at org.apache.hadoop.gateway.launcher.Command.run(Command.java:101)
        at org.apache.hadoop.gateway.launcher.Launcher.run(Launcher.java:69)
        at org.apache.hadoop.gateway.launcher.Launcher.main(Launcher.java:46)