ccaominh commented on issue #9179: Run IntelliJ inspections on Travis URL: https://github.com/apache/druid/pull/9179#issuecomment-576452722 When I tried to use IntelliJ 2019.3, running the inspection would print several error stack traces, for example: ``` java.lang.NullPointerException at com.intellij.codeInspection.deadCode.UnusedDeclarationInspectionBase$2.visitElement(UnusedDeclarationInspectionBase.java:409) at com.intellij.codeInspection.reference.RefJavaVisitor.visitMethod(RefJavaVisitor.java:32) at com.intellij.codeInspection.reference.RefMethodImpl.lambda$accept$0(RefMethodImpl.java:338) at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:791) at com.intellij.codeInspection.reference.RefMethodImpl.accept(RefMethodImpl.java:338) at com.intellij.codeInspection.reference.RefManagerImpl.iterate(RefManagerImpl.java:123) at com.intellij.codeInspection.deadCode.UnusedDeclarationInspectionBase.queryExternalUsagesRequests(UnusedDeclarationInspectionBase.java:403) at com.intellij.codeInspection.deadCode.UnusedDeclarationInspection.queryExternalUsagesRequests(UnusedDeclarationInspection.java:100) at com.intellij.codeInspection.ex.GlobalJavaInspectionContextImpl.performPostRunActivities(GlobalJavaInspectionContextImpl.java:465) at com.intellij.codeInspection.ex.GlobalInspectionContextImpl.runGlobalTools(GlobalInspectionContextImpl.java:765) at com.intellij.codeInspection.ex.GlobalInspectionContextImpl.runTools(GlobalInspectionContextImpl.java:448) at com.intellij.codeInspection.ex.GlobalInspectionContextBase.lambda$performInspectionsWithProgress$3(GlobalInspectionContextBase.java:244) at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:585) at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:531) at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:59) at com.intellij.codeInspection.ex.GlobalInspectionContextBase.performInspectionsWithProgress(GlobalInspectionContextBase.java:244) at com.intellij.codeInspection.ex.GlobalInspectionContextImpl.lambda$performInspectionsWithProgressAndExportResults$1(GlobalInspectionContextImpl.java:188) at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:791) at com.intellij.codeInspection.ex.GlobalInspectionContextImpl.performInspectionsWithProgressAndExportResults(GlobalInspectionContextImpl.java:196) at com.intellij.codeInspection.ex.GlobalInspectionContextImpl.launchInspectionsOffline(GlobalInspectionContextImpl.java:174) at com.intellij.codeInspection.InspectionApplication.lambda$runUnderProgress$17(InspectionApplication.java:512) at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:163) at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:585) at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:531) at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:59) at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:150) at com.intellij.codeInspection.InspectionApplication.runUnderProgress(InspectionApplication.java:505) at com.intellij.codeInspection.InspectionApplication.runAnalysis(InspectionApplication.java:320) at com.intellij.codeInspection.InspectionApplication.runAnalysisOnScope(InspectionApplication.java:296) at com.intellij.codeInspection.InspectionApplication.run(InspectionApplication.java:244) at com.intellij.codeInspection.InspectionApplication.lambda$execute$0(InspectionApplication.java:144) at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:821) at com.intellij.codeInspection.InspectionApplication.execute(InspectionApplication.java:136) at com.intellij.codeInspection.InspectionApplication.startup(InspectionApplication.java:121) at com.intellij.codeInspection.InspectionMain.main(InspectionMain.java:97) at com.intellij.idea.ApplicationLoader$startApp$8$1.run(ApplicationLoader.kt:242) at com.intellij.openapi.application.TransactionGuardImpl.performUserActivity(TransactionGuardImpl.java:193) at com.intellij.idea.ApplicationLoader$startApp$8.run(ApplicationLoader.kt:241) at java.util.concurrent.CompletableFuture.uniRun(Unknown Source) at java.util.concurrent.CompletableFuture$UniRun.tryFire(Unknown Source) at java.util.concurrent.CompletableFuture$Completion.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$500(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:908) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:781) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424) at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:698) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) ``` I haven't determined the cause and even though the inspection analysis does seem to complete successfully, I felt it would be better to not pollute the inspection output with error stack traces. However, when I tried it, I did notice that IntelliJ 2019.3.1 does print 200+ more inspection errors (mostly "Method is not reachable from entry points.") than IntelliJ 2018.3.6.
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