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https://issues.apache.org/jira/browse/FLINK-11049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16711508#comment-16711508
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Till Rohrmann commented on FLINK-11049:
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Hi [~zjffdu], the Flink works is that all branches of the DAG with a sink at
its end will be executed when one calls {{ExecutionEnvironment#execute}} or
calls a method which triggers eager execution ({{print}}, {{collect}} or
{{count}}). In that sense, the behaviour of the code snippet is expected.
How do you think Flink should behave in this situation.
> Unable to execute partial DAG
> -----------------------------
>
> Key: FLINK-11049
> URL: https://issues.apache.org/jira/browse/FLINK-11049
> Project: Flink
> Issue Type: Bug
> Components: Job-Submission
> Affects Versions: 1.7.0
> Reporter: Jeff Zhang
> Assignee: Jeff Zhang
> Priority: Major
> Labels: pull-request-available
>
> {code}
> val benv = ExecutionEnvironment.getExecutionEnvironment
> val btEnv = TableEnvironment.getTableEnvironment(benv)
> val data = benv.fromElements("hello world", "hello flink", "hello hadoop")
> data.writeAsText("/Users/jzhang/a.txt", FileSystem.WriteMode.OVERWRITE);
> val table = data.flatMap(line=>line.split("\\s")).
> map(w => (w, 1)).
> toTable(btEnv, 'word, 'number)
> btEnv.registerTable("wc", table)
> btEnv.sqlQuery("select word, count(1) from wc group by word").
> toDataSet[Row].print()
> {code}
> In the above example, the last statement will trigger 2 job execution
> (writeAsText and print), but what user expect is the print job. The root
> cause is that currently, flink unable to submit partial dag.
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