ignore exceptions during shutdown

editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/internal/remote/RemoteAnalysisServerImpl.java

Index: editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/internal/remote/RemoteAnalysisServerImpl.java
diff --git a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/internal/remote/RemoteAnalysisServerImpl.java b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/internal/remote/RemoteAnalysisServerImpl.java
index df2f6c3497ca75ad186ff2210fe37c2522fd5583..8f9ce51de51964b6f64ae138e03c126012678ef7 100644
--- a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/internal/remote/RemoteAnalysisServerImpl.java
+++ b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/internal/remote/RemoteAnalysisServerImpl.java
@@ -139,6 +139,10 @@ public class RemoteAnalysisServerImpl implements AnalysisServer {
             stream.lastRequestProcessed();
           }
         } catch (Throwable e) {
+          // Ignore exceptions during shutdown
+          if (shutdownRequested) {
+            return;
+          }
           if (e instanceof IOException) {
             String message = e.getMessage();
             if (message != null && message.contains("closed")) {
@@ -219,6 +223,11 @@ public class RemoteAnalysisServerImpl implements AnalysisServer {
    */
   private boolean watch;
 
+  /**
+   * A flag indicating whether the server shutdown process has been requested.
+   */
+  private boolean shutdownRequested;
+
   public RemoteAnalysisServerImpl(AnalysisServerSocket socket) {
     this.socket = socket;
   }
@@ -450,6 +459,7 @@ public class RemoteAnalysisServerImpl implements AnalysisServer {
 
   @Override
   public void server_shutdown() {
+    shutdownRequested = true;
     stopWatcher();
     String id = generateUniqueId();
     sendRequestToServer(id, RequestUtilities.generateServerShutdown(id), new BasicConsumer() {