message: Remove lock release. Change already exists
  That change was added by
diff: @@ -944,7 +944,6 @@ void ConnectionHandlerImpl::OnConnectionEnded(
  connection_list_lock_.AcquireForWriting();
  ConnectionList::iterator itr = connection_list_.find(connection_id);
  if (connection_list_.end() == itr) {
  - connection_list_lock_.Release();
  LOG4CXX_ERROR(logger_, "Connection not found!");
  return;
  }
  