force the datafile before it is removed so that all async writes are completed before the file handle is closed.

git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/trunk@476225 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/main/java/org/apache/activemq/kaha/impl/data/DataManager.java

@@ -259,6 +259,7 @@ public final class DataManager{
 
     private void removeDataFile(DataFile dataFile) throws IOException{
         fileMap.remove(dataFile.getNumber());
+        writer.force(dataFile);
         boolean result=dataFile.delete();
         log.debug("discarding data file "+dataFile+(result?"successful ":"failed"));
     }