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https://issues.apache.org/jira/browse/SPARK-14747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-14747.
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Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 12521
[https://github.com/apache/spark/pull/12521]
> Add assertStreaming/assertNoneStreaming checks in DataFrameWriter
> -----------------------------------------------------------------
>
> Key: SPARK-14747
> URL: https://issues.apache.org/jira/browse/SPARK-14747
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Liwei Lin
> Priority: Minor
> Fix For: 2.0.0
>
>
> If an end user happens to write the code mixed with continuous-query-oriented
> methods and non-continuous-query-oriented methods:
> {code}
> ctx.read
> .format("text")
> .stream("...") // continuous query
> .write
> .text("...") // non-continuous query
> {code}
> He/she would get somehow a confusing exception:
> {quote}
> Exception in thread "main" java.lang.AssertionError: assertion failed: No
> plan for FileSource\[./continuous_query_test_input\]
> at scala.Predef$.assert(Predef.scala:170)
> at
> org.apache.spark.sql.catalyst.planning.QueryPlanner.plan(QueryPlanner.scala:59)
> at
> org.apache.spark.sql.catalyst.planning.QueryPlanner.planLater(QueryPlanner.scala:54)
> at ...
> {quote}
> This JIRA proposes to add checks for continuous-query-oriented methods and
> non-continuous-query-oriented methods in `DataFrameWriter`.
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