[jira] [Updated] (SPARK-16613) A bug in RDD pipe operation

["Alex Krasnyansky (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-16613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alex Krasnyansky updated SPARK-16613:
-------------------------------------
    Description: 
Suppose we have such Spark code

{code}
object PipeExample {
  def main(args: Array[String]) {

    val fstRdd = sc.parallelize(List("hi", "hello", "how", "are", "you"))
    val pipeRdd = fstRdd.pipe("/Users/finkel/spark-pipe-example/src/main/resources/len.sh")

    pipeRdd.collect.foreach(println)
  }
}
{code}

It uses a bash script to convert a string to its length.

{code}
#!/bin/sh
read input
len=${#input}
echo $len
{code}

So far so good, but when I run the code, it prints incorrect output. For example:

{code}
0
2
0
5
3
0
3
3
{code}

I expect to see

{code}
2
5
3
3
3
{code}

which is correct output for the app. I think it's a bug. It's expected to see only positive integers and avoid zeros.

  was:
Suppose we have such Spark code

{code}
object PipeExample {
  def main(args: Array[String]) {

    val fstRdd = sc.parallelize(List("hi", "hello", "how", "are", "you"))
    val pipeRdd = fstRdd.pipe("/Users/finkel/spark-pipe-example/src/main/resources/len.sh")

    pipeRdd.collect.foreach(println)
  }
}
{code}

It uses a bash script to convert a string to its length.

{code}
#!/bin/sh
read input
len=${#input}
echo $len
{code}

So far so good, but when I run the code, it prints incorrect output. For example:

{code}
0
2
0
5
3
0
3
3
{code}

I expect to see

{code}
2
5
3
3
3
{code}

which it correct output for the app. I think it's a bug. It's expected to see only positive integers and avoid zeros.


> A bug in RDD pipe operation
> ---------------------------
>
>                 Key: SPARK-16613
>                 URL: https://issues.apache.org/jira/browse/SPARK-16613
>             Project: Spark
>          Issue Type: Bug
>            Reporter: Alex Krasnyansky
>
> Suppose we have such Spark code
> {code}
> object PipeExample {
>   def main(args: Array[String]) {
>     val fstRdd = sc.parallelize(List("hi", "hello", "how", "are", "you"))
>     val pipeRdd = fstRdd.pipe("/Users/finkel/spark-pipe-example/src/main/resources/len.sh")
>     pipeRdd.collect.foreach(println)
>   }
> }
> {code}
> It uses a bash script to convert a string to its length.
> {code}
> #!/bin/sh
> read input
> len=${#input}
> echo $len
> {code}
> So far so good, but when I run the code, it prints incorrect output. For example:
> {code}
> 0
> 2
> 0
> 5
> 3
> 0
> 3
> 3
> {code}
> I expect to see
> {code}
> 2
> 5
> 3
> 3
> 3
> {code}
> which is correct output for the app. I think it's a bug. It's expected to see only positive integers and avoid zeros.



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