error when opening a new IDE window with file opened

java.lang.NullPointerException
	at java.util.concurrent.ConcurrentHashMap.replaceNode(ConcurrentHashMap.java:1106)
	at java.util.concurrent.ConcurrentHashMap.remove(ConcurrentHashMap.java:1097)
	at org.wso2.lsp4intellij.client.languageserver.wrapper.LanguageServerWrapper.disconnect(LanguageServerWrapper.java:355)
	at org.wso2.lsp4intellij.client.languageserver.wrapper.LanguageServerWrapper.disconnect(LanguageServerWrapper.java:591)
	at org.wso2.lsp4intellij.IntellijLanguageClient.lambda$editorClosed$1(IntellijLanguageClient.java:217)
	at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:311)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	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 happen when you are working with the one IDE window with a file bounded to LS and then you decide to open a different project in a new IDE window which also has a opened file which will bounded to a LS.

[rasika]

Related to https://github.com/ballerina-platform/lsp4intellij/issues/70

[gayanper]

Some times this error is thrown as well, i got this twice today 😃

java.lang.NullPointerException
	at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
	at org.wso2.lsp4intellij.editor.EditorEventManagerBase.forUri(EditorEventManagerBase.java:93)
	at org.wso2.lsp4intellij.contributors.inspection.LSPInspection.checkFile(LSPInspection.java:62)
	at com.intellij.codeInspection.LocalInspectionTool$1.visitFile(LocalInspectionTool.java:142)
	at com.intellij.extapi.psi.PsiFileBase.accept(PsiFileBase.java:70)
	at com.intellij.codeInspection.InspectionEngine.acceptElements(InspectionEngine.java:75)
	at com.intellij.codeInspection.InspectionEngine.createVisitorAndAcceptElements(InspectionEngine.java:63)
	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.doInspectInjectedPsi(LocalInspectionsPass.java:752)
	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.lambda$inspectInjectedPsi$11(LocalInspectionsPass.java:355)
	at com.intellij.concurrency.JobLauncherImpl.lambda$null$0(JobLauncherImpl.java:128)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:586)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:532)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:86)
	at com.intellij.concurrency.JobLauncherImpl.lambda$processImmediatelyIfTooFew$1(JobLauncherImpl.java:124)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:940)
	at com.intellij.concurrency.JobLauncherImpl.processImmediatelyIfTooFew(JobLauncherImpl.java:135)
	at com.intellij.concurrency.JobLauncherImpl.invokeConcurrentlyUnderProgress(JobLauncherImpl.java:57)
	at com.intellij.concurrency.JobLauncher.invokeConcurrentlyUnderProgress(JobLauncher.java:56)
	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.inspectInjectedPsi(LocalInspectionsPass.java:358)
	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.inspect(LocalInspectionsPass.java:202)
	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.doInspectInBatch(LocalInspectionsPass.java:133)
	at org.wso2.lsp4intellij.editor.EditorEventManager.lambda$null$8(EditorEventManager.java:558)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:164)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:586)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:532)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:86)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:151)
	at org.wso2.lsp4intellij.editor.EditorEventManager.lambda$runInspection$9(EditorEventManager.java:556)
	at com.intellij.openapi.project.DumbServiceImpl.lambda$smartInvokeLater$7(DumbServiceImpl.java:445)
	at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:315)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:435)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:419)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:403)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
	at java.awt.EventQueue.access$500(EventQueue.java:98)
	at java.awt.EventQueue$3.run(EventQueue.java:715)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:741)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:690)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:385)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)