Github user chandnisingh commented on a diff in the pull request: https://github.com/apache/apex-core/pull/364#discussion_r73433050 --- Diff: engine/src/main/java/com/datatorrent/stram/engine/OperatorContext.java --- @@ -84,12 +87,13 @@ public void setIdleTimeout(long idleTimeout) * @param attributes the value of attributes * @param parentContext */ - public OperatorContext(int id, AttributeMap attributes, Context parentContext) + public OperatorContext(int id, String operatorName, AttributeMap attributes, Context parentContext) { super(attributes, parentContext); this.lastProcessedWindowId = Stateless.WINDOW_ID; this.id = id; this.stateless = super.getValue(OperatorContext.STATELESS); + this.operatorName = Preconditions.checkNotNull(operatorName, "operator name"); --- End diff -- @vrozov I am running this app with a ```null``` operator name and NullPointerException is thrown: ``` @ApplicationAnnotation(name = "TestApp") class SplitterApp implements StreamingApplication { MockReceiver receiver; @Override public void populateDAG(DAG dag, Configuration configuration) { dag.setAttribute(DAG.APPLICATION_PATH, baseTestMeta.dataDirectory); MockFileInput fileInput = dag.addOperator("Input", new MockFileInput()); fileInput.filePaths = baseTestMeta.filePaths; FileSplitterBase splitter = dag.addOperator(null, new FileSplitterBase()); splitter.setFile(baseTestMeta.dataDirectory); receiver = dag.addOperator("Receiver", new MockReceiver()); dag.addStream("files", fileInput.files, splitter.input); dag.addStream("file-metadata", splitter.filesMetadataOutput, receiver.fileMetadata); } } java.lang.NullPointerException at com.datatorrent.stram.plan.logical.LogicalPlan$OperatorMeta.equals(LogicalPlan.java:1187) at java.util.ArrayList.remove(ArrayList.java:528) at com.datatorrent.stram.plan.logical.LogicalPlan$StreamMeta.addSink(LogicalPlan.java:531) at com.datatorrent.stram.plan.logical.LogicalPlan.addStream(LogicalPlan.java:1391) at com.datatorrent.stram.plan.logical.LogicalPlan.addStream(LogicalPlan.java:1442) at com.datatorrent.stram.plan.logical.LogicalPlan.addStream(LogicalPlan.java:119) at com.datatorrent.lib.io.fs.FileSplitterBaseTest$SplitterApp.populateDAG(FileSplitterBaseTest.java:231) at com.datatorrent.stram.plan.logical.LogicalPlanConfiguration.prepareDAG(LogicalPlanConfiguration.java:2226) at com.datatorrent.stram.LocalModeImpl.prepareDAG(LocalModeImpl.java:67) at com.datatorrent.lib.io.fs.FileSplitterBaseTest.testSplitterInApp(FileSplitterBaseTest.java:205) 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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---