print the offending event also

platform/platform-impl/src/com/intellij/ide/IdeEventQueue.java

@@ -1156,7 +1156,7 @@ public class IdeEventQueue extends EventQueue {
   private final FrequentEventDetector myFrequentEventDetector = new FrequentEventDetector(1009, 100);
   @Override
   public void postEvent(@NotNull AWTEvent theEvent) {
-    myFrequentEventDetector.eventHappened();
+    myFrequentEventDetector.eventHappened(theEvent);
     super.postEvent(theEvent);
   }
 

platform/platform-impl/src/com/intellij/openapi/application/impl/LaterInvocator.java

@@ -47,7 +47,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-@SuppressWarnings({"SSBasedInspection"})
+@SuppressWarnings("SSBasedInspection")
 public class LaterInvocator {
   private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.application.impl.LaterInvocator");
   private static final boolean DEBUG = LOG.isDebugEnabled();
@@ -83,7 +83,7 @@ public class LaterInvocator {
 
   private static final List<Object> ourModalEntities = ContainerUtil.createLockFreeCopyOnWriteList();
   private static final List<RunnableInfo> ourQueue = new ArrayList<RunnableInfo>(); //protected by LOCK
-  private static volatile int ourQueueSkipCount = 0; // optimization
+  private static volatile int ourQueueSkipCount; // optimization
   private static final FlushQueue ourFlushQueueRunnable = new FlushQueue();
 
   private static final Stack<AWTEvent> ourEventStack = new Stack<AWTEvent>(); // guarded by RUN_LOCK
@@ -136,7 +136,7 @@ public class LaterInvocator {
 
   @NotNull
   static ActionCallback invokeLater(@NotNull Runnable runnable, @NotNull ModalityState modalityState, @NotNull Condition<?> expired) {
-    ourFrequentEventDetector.eventHappened();
+    ourFrequentEventDetector.eventHappened(runnable);
 
     final ActionCallback callback = new ActionCallback();
     RunnableInfo runnableInfo = new RunnableInfo(runnable, modalityState, expired, callback);

platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/RefreshQueueImpl.java

@@ -77,7 +77,7 @@ public class RefreshQueueImpl extends RefreshQueue implements Disposable {
       public void run() {
         try {
           myRefreshIndicator.start();
-          AccessToken token = HeavyProcessLatch.INSTANCE.processStarted("Doing file refresh. " + session.toString());
+          AccessToken token = HeavyProcessLatch.INSTANCE.processStarted("Doing file refresh. " + session);
           try {
             doScan(session);
           }
@@ -96,7 +96,7 @@ public class RefreshQueueImpl extends RefreshQueue implements Disposable {
         }
       }
     });
-    myEventCounter.eventHappened();
+    myEventCounter.eventHappened(session);
   }
 
   private void doScan(RefreshSessionImpl session) {

platform/util/src/com/intellij/openapi/diagnostic/FrequentEventDetector.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2014 JetBrains s.r.o.
+ * Copyright 2000-2015 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -53,7 +53,7 @@ public class FrequentEventDetector {
     myLevel = level;
   }
 
-  public void eventHappened() {
+  public void eventHappened(@NotNull Object event) {
     if (myEventsPosted.incrementAndGet() > myEventCountThreshold) {
       boolean shouldLog = false;
 
@@ -75,12 +75,14 @@ public class FrequentEventDetector {
           logTrace = existingTraceId == null;
           if (logTrace) {
             myRecentTraces.put(trace, traceId = myLastTraceId.incrementAndGet());
-          } else {
+          }
+          else {
             traceId = existingTraceId;
           }
         }
 
-        String message = "Too many events posted, #" + traceId  + (logTrace ? "\n" + trace : "");
+        String message = "Too many events posted, #" + traceId  + ". Event: "+event +
+                         (logTrace ? "\n" + trace : "");
         if (myLevel == Level.INFO) {
           LOG.info(message);
         }