public boolean removeNode(final TRemote key) {
    final BufferNode node = nodeMap.remove(key);
    if (node == null) {
      return false;
    }

    node.abortOperationsInQueue();
    return true;
  }
Remove a remote node
@param key the node identifier
hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/RemoteProcedureDispatcher.java