Mark Payne created NIFI-9331: -------------------------------- Summary: Potential NPE when logging long-running tasks Key: NIFI-9331 URL: https://issues.apache.org/jira/browse/NIFI-9331 Project: Apache NiFi Issue Type: Bug Components: Core Framework Reporter: Mark Payne
In the ThreadUtils class, we have the following code: if (monitor.getLockedStackFrame().equals(element)) However, getLockedStackFrame() can return null, which results in a NPE such as: 2021-10-24 11:38:17,122 ERROR org.apache.nifi.engine.FlowEngine: Uncaught Exception in Runnable task java.lang.NullPointerException: null at org.apache.nifi.util.ThreadUtils.createStackTrace(ThreadUtils.java:72) at org.apache.nifi.controller.StandardProcessorNode.getActiveThreads(StandardProcessorNode.java:1443) at org.apache.nifi.components.monitor.LongRunningTaskMonitor.run(LongRunningTaskMonitor.java:57) 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) -- This message was sent by Atlassian Jira (v8.3.4#803005)