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https://issues.apache.org/jira/browse/SPARK-11547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14993121#comment-14993121
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Apache Spark commented on SPARK-11547:
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User 'yueqianzhu' has created a pull request for this issue:
https://github.com/apache/spark/pull/9515
> Set JDBC fetchSize default value to make it easier to operate
> -------------------------------------------------------------
>
> Key: SPARK-11547
> URL: https://issues.apache.org/jira/browse/SPARK-11547
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: yue qian zhu
> Priority: Critical
> Fix For: 1.5.1
>
>
> if I do not set any properties manual for jdbc, when I show the data in the
> table, it will throw a java.lang.NullPointerException
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