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https://issues.apache.org/jira/browse/SPARK-7251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=1453#comment-1453
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Apache Spark commented on SPARK-7251:
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User 'JoshRosen' has created a pull request for
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https://issues.apache.org/jira/browse/SPARK-7251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14523006#comment-14523006
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Apache Spark commented on SPARK-7251:
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User 'kaka1992' has created a pull request for
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https://issues.apache.org/jira/browse/SPARK-7251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14522977#comment-14522977
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Chen Song commented on SPARK-7251:
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Can the key could be empty? If we allow the key could
