Cassandra 如何解决ALTER TABLE下的模式不匹配问题？

我在cqlsh中运行了这个命令（在运行Cassandra 2.1.2的10节点生产集群中）：

尽管超时，“alter table”命令似乎仍在运行

但随后cqlsh遇到了（），在应用CASSANDRA-8512中提到的补丁之前，cqlsh几乎无法使用

那么，它们是如何解决Cassandra中潜在的模式不匹配的；这样，例如，cqlsh可以再次运行

更新1

cqlsh> select release_version, host_id, schema_version from system.local;

 release_version | host_id                              | schema_version
-----------------+--------------------------------------+--------------------------------------
           2.1.2 | 15bb29cd-1c3c-43c9-ac82-e27d0b236066 | 489c8f81-4346-3bbe-afb9-bd998302d3a3

(1 rows)
cqlsh> select peer, release_version, host_id, schema_version from system.peers;

 peer        | release_version | host_id                              | schema_version
-------------+-----------------+--------------------------------------+--------------------------------------
 10.51.78.29 |           2.1.2 | de10ceb6-3fc1-4739-9d40-66a5ac510eeb | 22e8d11f-4c62-362f-8706-bf694c1a95dd
 10.51.78.27 |           2.1.2 | 6b165d96-5425-4e24-9e9d-d59bfab729fd | 489c8f81-4346-3bbe-afb9-bd998302d3a3
 10.51.78.20 |           2.1.2 | 6114a6bf-e3cf-4bce-b423-5d2c3976afc8 | 489c8f81-4346-3bbe-afb9-bd998302d3a3
 10.51.78.57 |           2.1.2 | 59ed0b67-6c45-48de-8755-ad8c7770f0ff | 489c8f81-4346-3bbe-afb9-bd998302d3a3
 10.51.78.59 |           2.1.2 | 00254eef-7b21-4f3a-9c18-159d4c1d4d73 | 489c8f81-4346-3bbe-afb9-bd998302d3a3
 10.51.78.58 |           2.1.2 | 90ccccdf-22b5-4eb3-99a6-5b880c5f5ebf | 489c8f81-4346-3bbe-afb9-bd998302d3a3
 10.51.78.14 |           2.1.2 | 60393d6d-fcb8-42ec-ba40-e34ec8d4ec69 | 489c8f81-4346-3bbe-afb9-bd998302d3a3
 10.51.78.56 |           2.1.2 | 5b82e847-7c8c-4b22-bc54-2fece674c8fa | 489c8f81-4346-3bbe-afb9-bd998302d3a3
 10.51.78.26 |           2.1.2 | a4d2d02b-74e6-4ab1-b610-efdf58f7c918 | 489c8f81-4346-3bbe-afb9-bd998302d3a3

---

通过运行以下命令从system.peers中删除重影节点来解决此问题：

delete from system.peers where peer='10.51.78.29';

在所有节点上

delete from system.peers where peer='10.51.78.29';