[NIFI-5962] AbstractHadoopProcessor can NPE when a configuration issue happens

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.8.0
• Fix Version/s: 1.9.0
• Assignee: Bryan Bende
• Reporter: Bryan Bende
• Created: 18/Jan/19 14:12
• Updated: 28/Jan/19 18:15
• Resolved: 28/Jan/19 18:15

Description

I was trying to configure a PutHDFS processor to connect to a kerberized HDFS cluster, and because of an issue with the kerberos config, the login during onScheduled failed and resulted on the configuration instance not being fully constructed, and then going into onStopped and encountering a NullPointerException:

2019-01-17 14:12:23,359 ERROR [Timer-Driven Process Thread-8] org.apache.nifi.util.ReflectionUtils Failed while invoking annotated method 'public final void org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.abstractOnStopped()' with arguments '[]'.
java.lang.reflect.InvocationTargetException: null
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:142)
        at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:130)
        at org.apache.nifi.util.ReflectionUtils.quietlyInvokeMethodsWithAnnotations(ReflectionUtils.java:268)
        at org.apache.nifi.util.ReflectionUtils.quietlyInvokeMethodsWithAnnotation(ReflectionUtils.java:90)
        at org.apache.nifi.controller.StandardProcessorNode.lambda$initiateStart$4(StandardProcessorNode.java:1547)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException: null
        at org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.abstractOnStopped(AbstractHadoopProcessor.java:286)
        ... 15 common frames omitted

 

 

Issue Links

• links to: GitHub Pull Request #3270