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Posted to user@flink.apache.org by Piotr Nowojski <pn...@apache.org> on 2021/02/01 14:49:30 UTC
Re: importing types doesn't fix “could not find implicit value for evidence parameter of type …TypeInformation”
Hey Devin,
Have you maybe tried looking for an answer via Google? Via just copying
pasting your error message into Google I'm getting hundreds of results
pointing towards:
import org.apache.flink.api.scala._
Best,
Piotrek
czw., 28 sty 2021 o 04:13 Devin Bost <de...@gmail.com> napisał(a):
> I posted this problem on Stack Overflow here:
> https://stackoverflow.com/questions/65930023/flink-importing-types-doesnt-fix-could-not-find-implicit-value-for-evidence
>
> Basically, I can't even get a basic map to work like this:
>
> object AmplitudeExample {
> def main(args: Array[String]) {
> import org.apache.flink.streaming.api.scala._
> import org.apache.flink.api.scala._
> val env = StreamExecutionEnvironment.getExecutionEnvironment
>
> val text = env.readTextFile("/Users/dbost/src/amplitude-flink/example-data.json")
>
> val partitionedEvents = text
> .map(t => t)
>
> partitionedEvents.print()
> }
> }
>
> I get:
>
> could not find implicit value for evidence parameter of type org.apache.flink.api.common.typeinfo.TypeInformation[String] .map(t => t)
>
> I'm using Flink 1.12.1 and Scala 2.12. What am I missing here?
>
> Devin G. Bost
>
Re: importing types doesn't fix “could not find implicit value for evidence parameter of type …TypeInformation”
Posted by Piotr Nowojski <pn...@apache.org>.
Hey,
Sorry for my hasty response. I didn't notice you have the import inside the
code block.
Have you maybe tried one of the responses suggested in the Stackoverflow by
other users?
Best,
Piotrek
pon., 1 lut 2021 o 15:49 Piotr Nowojski <pn...@apache.org> napisał(a):
> Hey Devin,
>
> Have you maybe tried looking for an answer via Google? Via just copying
> pasting your error message into Google I'm getting hundreds of results
> pointing towards:
>
> import org.apache.flink.api.scala._
>
> Best,
> Piotrek
>
> czw., 28 sty 2021 o 04:13 Devin Bost <de...@gmail.com> napisał(a):
>
>> I posted this problem on Stack Overflow here:
>> https://stackoverflow.com/questions/65930023/flink-importing-types-doesnt-fix-could-not-find-implicit-value-for-evidence
>>
>> Basically, I can't even get a basic map to work like this:
>>
>> object AmplitudeExample {
>> def main(args: Array[String]) {
>> import org.apache.flink.streaming.api.scala._
>> import org.apache.flink.api.scala._
>> val env = StreamExecutionEnvironment.getExecutionEnvironment
>>
>> val text = env.readTextFile("/Users/dbost/src/amplitude-flink/example-data.json")
>>
>> val partitionedEvents = text
>> .map(t => t)
>>
>> partitionedEvents.print()
>> }
>> }
>>
>> I get:
>>
>> could not find implicit value for evidence parameter of type org.apache.flink.api.common.typeinfo.TypeInformation[String] .map(t => t)
>>
>> I'm using Flink 1.12.1 and Scala 2.12. What am I missing here?
>>
>> Devin G. Bost
>>
>