I'm trying to use the ScriptedReportingTask but I'm getting this exception:       2020-06-18 21:53:55,892 ERROR [Timer-Driven Process Thread-9] o.a.n.r.script.ScriptedReportingTask ScriptedReportingTask[id=c96216cf-0172-1000-14c2-0419fd00a2ac] Failed to invoke @OnScheduled method due to java.lang.NoClassDefFoundError: org/apache/nifi/metrics/jvm/JmxJvmMetrics: {} java.lang.NoClassDefFoundError: org/apache/nifi/metrics/jvm/JmxJvmMetrics at org.apache.nifi.reporting.script.ScriptedReportingTask.setup(ScriptedReportingTask.java:146) 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.invokeMethodsWithAnnotations(ReflectionUtils.java:75) at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotation(ReflectionUtils.java:52) at org.apache.nifi.controller.scheduling.StandardProcessScheduler$2.run(StandardProcessScheduler.java:222) 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.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) 2020-06-18 21:53:55,893 ERROR [Timer-Driven Process Thread-9] o.a.n.c.s.StandardProcessScheduler Failed to invoke the On-Scheduled Lifecycle methods of [ScriptedReportingTask[id=c96216cf-0172-1000-14c2-0419fd00a2ac], java.lang.reflect.InvocationTargetException, 30 sec] due to {}; administratively yielding this ReportingTask and will attempt to schedule it again after {} 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.invokeMethodsWithAnnotations(ReflectionUtils.java:75) at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotation(ReflectionUtils.java:52) at org.apache.nifi.controller.scheduling.StandardProcessScheduler$2.run(StandardProcessScheduler.java:222) 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.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.NoClassDefFoundError: org/apache/nifi/metrics/jvm/JmxJvmMetrics at org.apache.nifi.reporting.script.ScriptedReportingTask.setup(ScriptedReportingTask.java:146) ... 17 common frames omitted         NiFi Version: 1.11.4 Docker Image: apache/nifi:1.11.4 Script Engine: Groovy Script Body:       def json = Class.forName("javax.json.Json") def httpClients = Class.forName("org.apache.http.impl.client.HttpClients") def contentType = Class.forName("org.apache.http.entity.ContentType") def status = context.getEventAccess().getControllerStatus(); def factory = json.createBuilderFactory(Collections.emptyMap()); def builder = factory.createObjectBuilder(); builder.add("componentId", status.getId()); builder.add("bytesRead", status.getBytesRead()); builder.add("bytesWritten", status.getBytesWritten()); builder.add("bytesReceived", status.getBytesReceived()); builder.add("bytesSent", status.getBytesSent()); builder.add("bytesTransferred", status.getBytesTransferred()); builder.add("flowFilesReceived", status.getFlowFilesReceived()); builder.add("flowFilesSent", status.getFlowFilesSent()); builder.add("flowFilesTransferred", status.getFlowFilesTransferred()); builder.add("inputContentSize", status.getInputContentSize()); builder.add("inputCount", status.getInputCount()); builder.add("outputContentSize", status.getOutputContentSize()); builder.add("outputCount", status.getOutputCount()); builder.add("queuedContentSize", status.getQueuedContentSize()); builder.add("activeThreadCount", status.getActiveThreadCount()); builder.add("queuedCount", status.getQueuedCount()); def requestEntity = new org.apache.http.entity.StringEntity(builder.build().toString(), contentType.APPLICATION_JSON); def httpclient = httpClients.createDefault(); def postMethod = new org.apache.http.client.methods.HttpPost("http://nifitwo:9999/rootStatus"); postMethod.setEntity(requestEntity); httpclient.execute(postMethod); httpclient.close();         ... 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