All right, I looked at the schemas. There is one mismatching nullability,
on a scala.Boolean. It looks like an empty Dataset with that *cannot* be
nullable. However, when I run my code to generate the Dataset, the schema
comes back with nullable = true. Effectively:
scala> val empty = spark.create
On 10/22/16 1:42 PM, Efe Selcuk wrote:
Ah, looks similar. Next opportunity I get, I'm going to do a
printSchema on the two datasets and see if they don't match up.
I assume that unioning the underlying RDDs doesn't run into this
problem because of less type checking or something along those
Ah, looks similar. Next opportunity I get, I'm going to do a printSchema on
the two datasets and see if they don't match up.
I assume that unioning the underlying RDDs doesn't run into this problem
because of less type checking or something along those lines?
On Fri, Oct 21, 2016 at 3:39 PM Cheng
Efe - You probably hit this bug:
https://issues.apache.org/jira/browse/SPARK-18058
On 10/21/16 2:03 AM, Agraj Mangal wrote:
I have seen this error sometimes when the elements in the schema have
different nullabilities. Could you print the schema for data and for
someCode.thatReturnsADataset()
I have seen this error sometimes when the elements in the schema have
different nullabilities. Could you print the schema for data and for
someCode.thatReturnsADataset() and see if there is any difference between
the two ?
On Fri, Oct 21, 2016 at 9:14 AM, Efe Selcuk wrote:
> Thanks for the respo
Thanks for the response. What do you mean by "semantically" the same?
They're both Datasets of the same type, which is a case class, so I would
expect compile-time integrity of the data. Is there a situation where this
wouldn't be the case?
Interestingly enough, if I instead create an empty rdd wi
I believe this normally comes when Spark is unable to perform union due to
"difference" in schema of the operands. Can you check if the schema of both
the datasets are semantically same ?
On Tue, Oct 18, 2016 at 9:06 AM, Efe Selcuk wrote:
> Bump!
>
> On Thu, Oct 13, 2016 at 8:25 PM Efe Selcuk w
Bump!
On Thu, Oct 13, 2016 at 8:25 PM Efe Selcuk wrote:
> I have a use case where I want to build a dataset based off of
> conditionally available data. I thought I'd do something like this:
>
> case class SomeData( ... ) // parameters are basic encodable types like
> strings and BigDecimals
>
>
