【发布时间】：2016-08-28 06:29:40
【问题描述】：
首先，我是 Cassandra 的新手，我确实阅读了手册并做了一些（基本）教程，了解如何设置它并使用 C# 与它通信。
我在按钮单击事件后面得到了一个选择查询。当我执行查询时，出现以下错误：
An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in Cassandra.dll
Additional information: Value to add was out of range.
代码：
private void bt_select_Click(object sender, EventArgs e)
{
Connect();
Row result = session.Execute("select * from meters where id = 1 AND ConnectionMeterID = 2 ALLOW FILTERING").First();
CloseConnection();
}
注意*实际存在一行id为1、ConnectionMeterID为2的行。
这是数据库：
Create table meters (
ID int,
ConnectionMeterID int,
ConnectionMeterRevision int,
PeriodStart timestamp,
PeriodEnd timestamp,
Volume1 float,Volume2 float,Volume3 float,
Volume4 float,Volume5 float,Volume6 float,
Volume7 float,Volume8 float,
DataTypeID int,
FileID int,
Remarks text,
QualityScore decimal,
LocationID int,
Removed int,
PRIMARY KEY (ID, ConnectionMeterID));
为什么会出现这个错误？
编辑：堆栈跟踪
<code> 'PloosCassandra.vshost.exe' (CLR v4.0.30319: PloosCassandra.vshost.exe): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Numerics\v4.0_4.0.0.0__b77a5c5 61934e089\System.Numerics.dll'. Cannot find or open the PDB file.
A first chance exception of type 'System.ArgumentOutOfRangeException' occurred in Cassandra.dll
System.ArgumentOutOfRangeException: Value to add was out of range.
Parameter name: value
at System.DateTime.Add(Double value, Int32 scale)
at System.DateTimeOffset.AddMilliseconds(Double milliseconds)
at Cassandra.Serialization.Primitive.DateTimeOffsetSerializer.Deserialize(Byte[] buffer, Int32 offset)
at Cassandra.Serialization.Primitive.DateTimeOffsetSerializer.Deserialize(UInt16 protocolVersion, Byte[] buffer, Int32 offset, Int32 length, IColumnInfo typeInfo)
at Cassandra.Serialization.TypeSerializer 1.Cassandra.Serialization.ITypeSerializer.Deserialize(UInt16 protocolVersion, Byte[] buffer, Int32 offset, Int32 length, IColumnInfo typeInfo)
at Cassandra.Serialization.Serializer.Deserialize(Byte[] buffer, Int32 offset, Int32 length, ColumnTypeCode typeCode, IColumnInfo typeInfo)
at Cassandra.FrameReader.ReadFromBytes(Byte[] buffer, Int32 offset, Int32 length, ColumnTypeCode typeCode, IColumnInfo typeInfo)
at Cassandra.OutputRows.ProcessRowItem(FrameReader reader)
at Cassandra.OutputRows.ProcessRows(RowSet rs, FrameReader reader)
at Cassandra.OutputRows..ctor(FrameReader reader, Nullable 1 traceId)
at Cassandra.Responses.ResultResponse..ctor(Frame frame)
at Cassandra.Responses.ResultResponse.Create(Frame frame)
at Cassandra.FrameParser.Parse(Frame frame)
at Cassandra.Connection.<>c__DisplayClasse. <CreateResponseAction>b__d(MemoryStream stream)
at Cassandra.Tasks.TaskHelper.WaitToComplete(Task task, Int32 timeout)
at Cassandra.Tasks.TaskHelper.WaitToComplete[T](Task 1 task, Int32 timeout)
at Cassandra.Session.Execute(IStatement statement)
at Cassandra.Session.Execute(String cqlQuery)
at PloosCassandra.Form1.bt_select_Click(Object sender, EventArgs e) in c:\Users\rudi\Documents\Visual Studio 2013\Projects\PloosCassandra\PloosCassandra\Form1.cs:line 58
【问题讨论】：
-
没有良好的堆栈跟踪，任何异常都是不完整的。调试您的应用程序并让它在抛出异常时中断，而不仅仅是未处理的异常。
-
@Proliges 你从哪一行得到异常？你刚刚执行了什么
Select * from meters where ID = 1 AND ConnectionMeterID = 2？ -
@JeroenMostert 堆栈跟踪已添加。
-
@Neel 然后我得到一个不同的错误，告诉我我应该允许过滤。
-
堆栈跟踪最终显示该错误与您的查询无关，因为我怀疑它不会有。您的某个
timestamp列的内容有问题，或者库包含无法解析有效内容的错误。