[jira] [Created] (NIFI-11297) Prometheus Reporting Task throws a NullPointerException for Stateless NiFi

["Stephanie Ambrose (Jira)" <ji...@apache.org>]

Stephanie Ambrose created NIFI-11297:
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             Summary: Prometheus Reporting Task throws a NullPointerException for Stateless NiFi
                 Key: NIFI-11297
                 URL: https://issues.apache.org/jira/browse/NIFI-11297
             Project: Apache NiFi
          Issue Type: Bug
            Reporter: Stephanie Ambrose


When configuring the Prometheus reporting task for Stateless NiFi, a NullPointerException is thown and it does not work.

Here are my config properties:
nifi.stateless.reporting.task.prometheus.name=Prometheus
nifi.stateless.reporting.task.prometheus.type=PrometheusReportingTask
nifi.stateless.reporting.task.prometheus.bundle=org.apache.nifi:nifi-prometheus-nar:1.12.1
nifi.stateless.reporting.task.prometheus.properties.prometheus-reporting-task-metrics-endpoint-port=9100
nifi.stateless.reporting.task.prometheus.properties.prometheus-reporting-task-instance-id=statelessNiFi1
nifi.stateless.reporting.task.prometheus.properties.prometheus-reporting-task-metrics-strategy=All Components
nifi.stateless.reporting.task.prometheus.properties.prometheus-reporting-task-metrics-send-jvm=false
nifi.stateless.reporting.task.prometheus.properties.prometheus-reporting-task-client-auth=No Authentication

And here is the error that is thrown to my Prometheus server:


HTTP ERROR 500 java.lang.NullPointerException
URI:	/metrics/
STATUS:	500
MESSAGE:	java.lang.NullPointerException
SERVLET:	org.apache.nifi.reporting.prometheus.PrometheusServer$MetricsServlet-6d1c2fd6
CAUSED BY:	java.lang.NullPointerException
Caused by:
java.lang.NullPointerException
	at org.apache.nifi.reporting.prometheus.PrometheusReportingTask.lambda$onScheduled$0(PrometheusReportingTask.java:133)
	at org.apache.nifi.reporting.prometheus.PrometheusServer$MetricsServlet.doGet(PrometheusServer.java:69)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:554)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.Server.handle(Server.java:516)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
	at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
	at java.base/java.lang.Thread.run(Thread.java:829)
 

We intend to use the Prometheus reporting task in Stateless NiFi for HPA and pod health, so for us this would be a critical bug fix.

 

Thanks!



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