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https://issues.apache.org/jira/browse/SPARK-16226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15362190#comment-15362190
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Apache Spark commented on SPARK-16226:
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User 'srowen' has created a pull request for this issue:
https://github.com/apache/spark/pull/14054
> Weaken JDBC isolation level to avoid locking when writing partitions
> --------------------------------------------------------------------
>
> Key: SPARK-16226
> URL: https://issues.apache.org/jira/browse/SPARK-16226
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.6.2
> Reporter: lihongli
> Assignee: Sean Owen
> Priority: Minor
>
> In the file
> spark/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala,we
> have the method savePartition().We can create JDBC connection with each
> partition.But when I insert data to my relational DB,it is blocked.I found
> that we commit once in a partition.Then I changed it.I commit
> after executeBatch() and my code worked properly.I did not know how it
> performed in NoSQL database,but it does have a problem in my relational DB.
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