zhengruifeng commented on PR #38956:
URL: https://github.com/apache/spark/pull/38956#issuecomment-1340714677
it keep failing in the invocation of constructor, I print the constructor as
well as expressions in the error message, and they looks fine
```
grpc._channel._MultiThreadedRendezvous: <_MultiThreadedRendezvous of RPC
that terminated with:
status = StatusCode.UNKNOWN
details = "[FAILED_FUNCTION_CALL] Failed preparing of the function
`when_1, constructor:public
org_apache_spark_sql_catalyst_expressions_CaseWhen(scala_collection_Seq),
exprs:class org_apache_spark_sql_catalyst_expressions_EqualTo:(cast(a#6 as
bigint) = 0) , class org_apache_spark_sql_catalyst_expressions_Literal:1_0 ,
class org_apache_spark_sql_catalyst_expressions_Literal:2_0, error:null` for
call. Please, double check function's arguments."
debug_error_string =
"{"created":"@1670408082.289473000","description":"Error received from peer
ipv6:[::1]:15002","file":"src/core/lib/surface/call.cc","file_line":1064,"grpc_message":"[FAILED_FUNCTION_CALL]
Failed preparing of the function `when_1, constructor:public
org_apache_spark_sql_catalyst_expressions_CaseWhen(scala_collection_Seq),
exprs:class org_apache_spark_sql_catalyst_expressions_EqualTo:(cast(a#6 as
bigint) = 0) , class org_apache_spark_sql_catalyst_expressions_Literal:1_0 ,
class org_apache_spark_sql_catalyst_expressions_Literal:2_0, error:null` for
call. Please, double check function's arguments.","grpc_status":2}"
```
I also check in the shell:
```
scala> import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.catalyst.expressions._
scala> val casewhen = CaseWhen(Seq.empty, None)
casewhen: org.apache.spark.sql.catalyst.expressions.CaseWhen = CASE END
scala> val varargCtor =
casewhen.getClass.getConstructors().find(_.getParameterTypes.toSeq ==
Seq(classOf[Seq[_]]))
varargCtor: Option[java.lang.reflect.Constructor[_]] = Some(public
org.apache.spark.sql.catalyst.expressions.CaseWhen(scala.collection.Seq))
scala> val expressions = Seq((col("a").cast("long") === 0).expr,
lit(1.0).expr, lit(2.0).expr)
expressions: Seq[org.apache.spark.sql.catalyst.expressions.Expression] =
List((cast('a as bigint) = 0), 1.0, 2.0)
scala> varargCtor.get.newInstance(expressions)
res10: Any = CASE WHEN (cast('a as bigint) = 0) THEN 1.0 ELSE 2.0 END
```
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