Question

使用Cassandra.Session中的方法时：

/// <summary>
/// Prepares the provided query string.
/// </summary>
/// <param name="cqlQuery">cql query to prepare</param>
PreparedStatement Prepare(string cqlQuery);

内部抛出异常：

Message: A first chance exception of type 'System.ArgumentException' occurred in Cassandra.dll
Additional information: Column column_aliases not found

Cassandra.dll!Cassandra.Row.GetValue<string>(string name)   Unknown
Cassandra.dll!Cassandra.KeyspaceMetadata.GetTableMetadata(string tableName) Unknown
Cassandra.dll!Cassandra.Metadata.GetTable(string keyspace, string tableName)    Unknown
Cassandra.dll!Cassandra.Session.SetPrepareTableInfo(System.Threading.Tasks.Task<Cassandra.PreparedStatement> t) Unknown
Cassandra.dll!Cassandra.Tasks.TaskHelper.DoNext<Cassandra.PreparedStatement,Cassandra.PreparedStatement>(System.Threading.Tasks.Task<Cassandra.PreparedStatement> task, System.Func<System.Threading.Tasks.Task<Cassandra.PreparedStatement>,Cassandra.PreparedStatement> next) Unknown
Cassandra.dll!Cassandra.Tasks.TaskHelper.Continue<Cassandra.PreparedStatement,Cassandra.PreparedStatement>.AnonymousMethod__9(System.Threading.Tasks.Task<Cassandra.PreparedStatement> innerTask)   Unknown

因此，未设置准备好的查询的路由键，我必须手动设置它们。以下是日志的消息：

Cassandra.Session: 08-18-2015 14:21:38.367 +02:00 #ERROR: There was an error while trying to retrieve table metadata for mykeyspace.mytable.
System.ArgumentException: Column column_aliases not found
in Cassandra.Row.GetValue[T](String name)
in Cassandra.KeyspaceMetadata.GetTableMetadata(String tableName)
in Cassandra.Metadata.GetTable(String keyspace, String tableName)
in Cassandra.Session.SetPrepareTableInfo(Task`1 t)
Cassandra.Session: 08-18-2015 14:21:38.369 +02:00 : Routing information could not be set for query "INSERT INTO mytable (x, y, z, k, a) VALUES (?, ?, ?, ?, ?)"

如何解决这个问题？

我正在使用：

Cassandra C＃Driver version 2.5.2
Cassandra Datastax Community版本2.2.0

Answer 1

您应该使用完全支持Apache Cassandra 2.2的DataStax C＃驱动程序的v2.6 +。

Read more in the DataStax C# Driver v2.6 blog post

由于ArgumentException未设置Cassandra路由密钥：未找到列column_aliases

1 个答案: