添加同步锁，避免错误删除未发送的消息缓存。

src/main/java/com/gzzn/omms/msgexchangeapi/service/FltrSendBufferService.java

@@ -21,7 +21,9 @@ public class FltrSendBufferService implements IFltrSendBufferService {
 	
 	@Override
 	public void addFltr(SCHD.FLTR  fltr) {
-		fltrBuffer.add(fltr);
+		synchronized (fltrBuffer) {
+		  fltrBuffer.add(fltr);
+		}
 	}