[jira] [Commented] (SPARK-5270) Elegantly check if RDD is empty
[ https://issues.apache.org/jira/browse/SPARK-5270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14279962#comment-14279962 ] Al M commented on SPARK-5270: - Good point it's not a catch-all solution. The rdd.partitions.size solution does work well in the case of empty RDDs created by Spark streaming. 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Commented] (SPARK-5270) Elegantly check if RDD is empty
[ https://issues.apache.org/jira/browse/SPARK-5270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14280145#comment-14280145 ] Sean Owen commented on SPARK-5270: -- I think it would be nice to have a utility method like this indeed since it can wrap up all these options. Check for 0 partitions then check for first element. Mind if I make a PR? 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Commented] (SPARK-5270) Elegantly check if RDD is empty
[ https://issues.apache.org/jira/browse/SPARK-5270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14280260#comment-14280260 ] Al M commented on SPARK-5270: - I don't mind at all. I'd be really happy to have such a utility method in Spark. 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Commented] (SPARK-5270) Elegantly check if RDD is empty
[ https://issues.apache.org/jira/browse/SPARK-5270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14280491#comment-14280491 ] Apache Spark commented on SPARK-5270: - User 'srowen' has created a pull request for this issue: https://github.com/apache/spark/pull/4074 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Commented] (SPARK-5270) Elegantly check if RDD is empty
[ https://issues.apache.org/jira/browse/SPARK-5270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14278983#comment-14278983 ] Al M commented on SPARK-5270: - I just noticed that rdd.partitions.size is set to 0 for empty RDDs and 0 for RDDs with data; this is a far more elegant check than the others. 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Commented] (SPARK-5270) Elegantly check if RDD is empty
[
https://issues.apache.org/jira/browse/SPARK-5270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14278993#comment-14278993
]
Sean Owen commented on SPARK-5270:
--
I think it's conceivable to have an RDD with no elements but nonzero partitions
though. Witness:
{code}
val empty = sc.parallelize(Array[Int]())
empty.count
...
0
empty.partitions.size
...
8
{code}
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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