flush serializers as earlier as possible to prevent one of the reasons of SerilizerNotFoundException (IDEA-136562). Serializers are initialized once so no extra io is introduced

(cherry picked from commit fa25663)

platform/lang-api/src/com/intellij/psi/stubs/SerializationManagerImpl.java

@@ -19,8 +19,8 @@ import com.intellij.openapi.application.PathManager;
 import com.intellij.openapi.components.ApplicationComponent;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.util.ShutDownTracker;
-import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.util.io.AbstractStringEnumerator;
+import com.intellij.util.io.IOUtil;
 import com.intellij.util.io.PersistentStringEnumerator;
 import org.jetbrains.annotations.NotNull;
 
@@ -81,14 +81,7 @@ public class SerializationManagerImpl extends SerializationManagerEx implements
           myNameStorage.close();
         }
 
-        final File[] files = myFile.getParentFile().listFiles();
-        if (files != null) {
-          for (File file : files) {
-            if (file.getName().startsWith(myFile.getName())) {
-              FileUtil.delete(file);
-            }
-          }
-        }
+        IOUtil.deleteAllFilesStartingWith(myFile);
         myNameStorage = new PersistentStringEnumerator(myFile, true);
         myStubSerializationHelper = new StubSerializationHelper(myNameStorage);
         for (ObjectStubSerializer serializer : myAllSerializers) {
@@ -104,7 +97,9 @@ public class SerializationManagerImpl extends SerializationManagerEx implements
 
   @Override
   public void flushNameStorage() {
-    myNameStorage.force();
+    if (myNameStorage.isDirty()) {
+      myNameStorage.force();
+    }
   }
 
   @Override

platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndexImpl.java

@@ -355,6 +355,8 @@ public class FileBasedIndexImpl extends FileBasedIndex {
 
         @Override
         public void run() {
+          mySerializationManagerEx.flushNameStorage();
+
           if (lastModCount == myLocalModCount) {
             flushAllIndices(lastModCount);
           }
@@ -712,9 +714,6 @@ public class FileBasedIndexImpl extends FileBasedIndex {
       }
     }
 
-    if (!HeavyProcessLatch.INSTANCE.isRunning() && modCount == myLocalModCount) { // do not interfere with 'main' jobs
-      mySerializationManagerEx.flushNameStorage();
-    }
     ContentHashesSupport.flushContentHashes();
   }