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https://issues.apache.org/jira/browse/SPARK-5270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Al M updated SPARK-5270:
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Description:
Right now there is no clean way to check if an RDD is empty. As discussed
here:
http://apache-spark-user-list.1001560.n3.nabble.com/Testing-if-an-RDD-is-empty-td1678.html#a1679
I'd like a method rdd.isEmpty that returns a boolean.
This would be especially useful when using streams. Sometimes my batches are
huge in one stream, sometimes I get nothing for hours. Still I have to run
count() to check if there is anything in the RDD. I can process my empty RDD
like the others but it would be more efficient to just skip the empty ones.
I can also run first() and catch the exception; this is neither a clean nor
fast solution.
was:
Right now there is no clean way to check if an RDD is empty. As discussed
here:
http://apache-spark-user-list.1001560.n3.nabble.com/Testing-if-an-RDD-is-empty-td1678.html#a1679
This is especially a problem when using streams. Sometimes my batches are huge
in one stream, sometimes i get nothing for hours. Still I have to run count()
to check if there is anything in the RDD.
I can also run first() and catch the exception; this is neither a clean nor
fast solution.
I'd like a method rdd.isEmpty that returns a boolean.
> Elegantly check if RDD is empty
> -------------------------------
>
> Key: SPARK-5270
> URL: https://issues.apache.org/jira/browse/SPARK-5270
> Project: Spark
> Issue Type: Improvement
> Affects Versions: 1.2.0
> Environment: Centos 6
> Reporter: Al M
> Priority: Trivial
>
> Right now there is no clean way to check if an RDD is empty. As discussed
> here:
> http://apache-spark-user-list.1001560.n3.nabble.com/Testing-if-an-RDD-is-empty-td1678.html#a1679
> I'd like a method rdd.isEmpty that returns a boolean.
> This would be especially useful when using streams. Sometimes my batches are
> huge in one stream, sometimes I get nothing for hours. Still I have to run
> count() to check if there is anything in the RDD. I can process my empty RDD
> like the others but it would be more efficient to just skip the empty ones.
> I can also run first() and catch the exception; this is neither a clean nor
> fast solution.
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