Chris Sampson created NIFI-9222:
-----------------------------------
Summary: ControllerStatusReportingTask NullPointerException when
trying to printCounterStatus
Key: NIFI-9222
URL: https://issues.apache.org/jira/browse/NIFI-9222
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Affects Versions: 1.14.0
Reporter: Chris Sampson
After upgrading to 1.14.0 (from 1.13.0), we're seeing the following stacktrace
every 5 minutes (with a ControllerStatusReportingTask configured to execute in
the cluster every 5 minutes):
{code:java}
2021-09-16 15:32:30,665 ERROR [Timer-Driven Process Thread-6]
o.a.n.c.ControllerStatusReportingTask
ControllerStatusReportingTask[id=c0c4e9cf-017b-1000-ffff-ffff83166400] :
java.lang.NullPointerException
java.lang.NullPointerException: null
at
org.apache.nifi.controller.ControllerStatusReportingTask.printCounterStatus(ControllerStatusReportingTask.java:207)
at
org.apache.nifi.controller.ControllerStatusReportingTask.printCounterStatus(ControllerStatusReportingTask.java:233)
at
org.apache.nifi.controller.ControllerStatusReportingTask.printCounterStatus(ControllerStatusReportingTask.java:233)
at
org.apache.nifi.controller.ControllerStatusReportingTask.printCounterStatus(ControllerStatusReportingTask.java:233)
at
org.apache.nifi.controller.ControllerStatusReportingTask.printCounters(ControllerStatusReportingTask.java:196)
at
org.apache.nifi.controller.ControllerStatusReportingTask.onTrigger(ControllerStatusReportingTask.java:151)
at
org.apache.nifi.controller.tasks.ReportingTaskWrapper.run(ReportingTaskWrapper.java:44)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
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)
{code}
Looking at the [source
code|https://github.com/apache/nifi/blob/rel/nifi-1.14.0/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-reporting-tasks/src/main/java/org/apache/nifi/controller/ControllerStatusReportingTask.java#L207],
I'd guess that a check for there being no counters in the processorStatus
would be sensible, e.g.
{code:java}
if (counters != null && !counters.isEmpty) { ... }
{code}
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