Slow operations are prohibited on EDT

[matthias-margush]

I often get these exception alerts when working on a Clojure project with Cursive. I didn't see an existing issue related to this, so I thought I would raise it. Let me know if there are more details that would be helpful.

java.lang.Throwable: Slow operations are prohibited on EDT. See SlowOperations.assertSlowOperationsAreAllowed javadoc.
	at com.intellij.openapi.diagnostic.Logger.error(Logger.java:182)
	at com.intellij.util.SlowOperations.assertSlowOperationsAreAllowed(SlowOperations.java:102)
	at com.intellij.util.indexing.FileBasedIndexImpl.ensureUpToDate(FileBasedIndexImpl.java:784)
	at com.intellij.util.indexing.FileBasedIndexEx.processExceptions(FileBasedIndexEx.java:244)
	at com.intellij.util.indexing.FileBasedIndexEx.processValueIterator(FileBasedIndexEx.java:349)
	at com.intellij.util.indexing.FileBasedIndexEx.processValuesInScope(FileBasedIndexEx.java:318)
	at com.intellij.util.indexing.FileBasedIndexEx.processValues(FileBasedIndexEx.java:223)
	at com.intellij.util.indexing.FileBasedIndexEx.processValues(FileBasedIndexEx.java:211)
	at cursive.index$var_meta_by_fqn.invokeStatic(index.clj:346)
	at cursive.index$var_meta_by_fqn.invoke(index.clj:340)
	at cursive.symbol$var_meta.invokeStatic(symbol.clj:64)
	at cursive.symbol$var_meta.invoke(symbol.clj:46)
	at cursive.resolve.symbol$resolve_symbol.invokeStatic(symbol.clj:95)
	at cursive.resolve.symbol$resolve_symbol.invoke(symbol.clj:80)
	at clojure.lang.Var.invoke(Var.java:388)
	at cursive.api.DelayedFn.invoke(DelayedFn.java:36)
	at cursive.psi.impl.symbols.SymbolReference$SymbolResolver.resolve(SymbolReference.java:70)
	at cursive.psi.impl.symbols.SymbolReference$SymbolResolver.resolve(SymbolReference.java:66)
	at cursive.resolve.ResolveCache.lambda$resolve$1(ResolveCache.java:153)
	at com.intellij.openapi.util.Computable.get(Computable.java:18)
	at cursive.resolve.ResolveCache.lambda$loggingResolver$4(ResolveCache.java:259)
	at com.intellij.openapi.util.Computable.get(Computable.java:18)
	at cursive.resolve.ResolveCache.resolve(ResolveCache.java:237)
	at cursive.resolve.ResolveCache.resolve(ResolveCache.java:153)
	at cursive.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:168)
	at cursive.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:161)
	at cursive.psi.impl.symbols.SymbolReference.multiResolve(SymbolReference.java:60)
	at cursive.resolve$resolve.invokeStatic(resolve.clj:54)
	at cursive.resolve$resolve.invoke(resolve.clj:51)
	at cursive.resolve$resolve_keys.invokeStatic(resolve.clj:192)
	at cursive.resolve$resolve_keys.invoke(resolve.clj:179)
	at cursive.repl.actions$top_ancestor.invokeStatic(actions.clj:188)
	at cursive.repl.actions$top_ancestor.invoke(actions.clj:180)
	at cursive.repl.actions$find_top_form.invokeStatic(actions.clj:197)
	at cursive.repl.actions$find_top_form.invoke(actions.clj:193)
	at clojure.lang.Var.invoke(Var.java:384)
	at cursive.api.DelayedFn.invoke(DelayedFn.java:31)
	at cursive.repl.actions.Repl$RunTopSexp.getText(Repl.java:138)
	at cursive.actions.ClojureActionBase.update(ClojureActionBase.java:46)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.lambda$performDumbAwareUpdate$0(ActionUtil.java:131)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performDumbAwareUpdate(ActionUtil.java:145)
	at com.intellij.openapi.actionSystem.impl.ActionUpdater.doUpdate(ActionUpdater.java:602)
	at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$updateActionReal$7(ActionUpdater.java:126)
	at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$callAction$8(ActionUpdater.java:191)
	at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:57)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:188)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:624)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:698)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:646)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:623)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:175)
	at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:57)
	at com.intellij.openapi.actionSystem.impl.ActionUpdater.lambda$callAction$9(ActionUpdater.java:189)
	at com.intellij.openapi.actionSystem.impl.ActionUpdateEdtExecutor.lambda$computeOnEdt$0(ActionUpdateEdtExecutor.java:45)
	at com.intellij.openapi.actionSystem.impl.Utils.lambda$runUpdateSessionForInputEvent$19(Utils.java:557)
	at com.intellij.openapi.actionSystem.impl.Utils.runLoopAndWaitForFuture(Utils.java:582)
	at com.intellij.openapi.actionSystem.impl.Utils.runUpdateSessionForInputEvent(Utils.java:555)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.lambda$processAction$5(IdeKeyEventDispatcher.java:613)
	at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:57)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:188)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:624)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:698)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:646)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:623)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:175)
	at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:57)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:611)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:584)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processActionOrWaitSecondStroke(IdeKeyEventDispatcher.java:467)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.inInitState(IdeKeyEventDispatcher.java:456)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:224)
	at com.intellij.ide.IdeEventQueue.dispatchKeyEvent(IdeEventQueue.java:804)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:754)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:447)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:818)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:446)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:805)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:498)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

[shinichy]

This issue also often happens to me.