Cassandra InvalidQueryException:密钥不能为空 [英] Cassandra InvalidQueryException: Key may not be empty

问题描述

InvalidQueryException:密钥不能为空将Java驱动程序用于DataStax Astra Cassandra DB时.

InvalidQueryException: Key may not be empty When using the Java Driver for DataStax Astra Cassandra DB.

我100％确保我的partitionKey或clusteringColumns不为空.有人可以告诉我这个错误除了意味着什么?

I'm 100% sure that my partitionKey or my clusteringColumns are not empty. Can someone tell me what this error can mean besides that?

同一代码在异常发生前1小时有效吗?

The same code worked 1 hour before what does that exception mean?

推荐答案

谢谢你们，但我自己找到了.

Thank you guys but I just found it myself.

我在 ByteBuffer 中写了 Long ，此后不使用 flip().

I wrote a Long into an ByteBuffer and didn't use flip() afterwards.

 public static ByteBuffer toBB(Long x) {
    ByteBuffer bb = ByteBuffer.allocate(Long.BYTES);
    if (x == null) {
        return null;
    }
    bb.putLong(x);
    bb.flip(); //Added this line here and it works
    return bb;
}

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