Java Cassandra和插入浮点列

我有以下Cassandra配置：

    <ColumnFamily CompareWith="LongType" Name="MiFamily">

我得到以下例外情况：

    Exception in thread "main" me.prettyprint.hector.api.exceptions.HInvalidRequestException: InvalidRequestException(why:A long is exactly 8 bytes)
at me.prettyprint.cassandra.service.ExceptionsTranslatorImpl.translate(ExceptionsTranslatorImpl.java:28)
    at me.prettyprint.cassandra.service.KeyspaceServiceImpl$1.execute(KeyspaceServiceImpl.java:103)
    at me.prettyprint.cassandra.service.KeyspaceServiceImpl$1.execute(KeyspaceServiceImpl.java:96)
    at me.prettyprint.cassandra.service.Operation.executeAndSetResult(FailoverOperator.java:384)
    at me.prettyprint.cassandra.service.FailoverOperator.operateSingleIteration(FailoverOperator.java:190)
    at me.prettyprint.cassandra.service.FailoverOperator.operate(FailoverOperator.java:99)
    at me.prettyprint.cassandra.service.KeyspaceServiceImpl.operateWithFailover(KeyspaceServiceImpl.java:151)
    at me.prettyprint.cassandra.service.KeyspaceServiceImpl.batchInsert(KeyspaceServiceImpl.java:107)
    at borrar.PruebasCassandra.insertData(PruebasCassandra.java:77)
    at borrar.PruebasCassandra.main(PruebasCassandra.java:96)
Caused by: InvalidRequestException(why:A long is exactly 8 bytes)
    at org.apache.cassandra.thrift.Cassandra$batch_insert_result.read(Cassandra.java:13332)
    at org.apache.cassandra.thrift.Cassandra$Client.recv_batch_insert(Cassandra.java:717)
    at org.apache.cassandra.thrift.Cassandra$Client.batch_insert(Cassandra.java:692)
    at me.prettyprint.cassandra.service.KeyspaceServiceImpl$1.execute(KeyspaceServiceImpl.java:100)
    ... 8 more

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谢谢你的帮助。我在使用batchInsert时出错。

Cassandra 0.8.1不支持浮点：

• 添加日期、浮点、双精度和布尔类型（CASSANDRA-2530）
• 看

使用Java Hector：

StringSerializer se = new StringSerializer();
FloatSerializer fls = new FloatSerializer();
mutator.insert("mykey", "User", HFactory.createColumn("ftest", 0.12345678f, se, fls));

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脱离主题，但是：

dos.writeLong（新的Long（1.longValue（））？！如何
dos.writeLong（1L）？我觉得你的代码很好。字节数组的长度如预期的那样为8。你确定这是导致错误的代码吗？你能解释一下你做错了什么以及你是如何修复的吗？其他人可能也有同样的问题。
StringSerializer se = new StringSerializer();
FloatSerializer fls = new FloatSerializer();
mutator.insert("mykey", "User", HFactory.createColumn("ftest", 0.12345678f, se, fls));