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https://issues.apache.org/jira/browse/FLINK-9289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16520269#comment-16520269
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ASF GitHub Bot commented on FLINK-9289:
---------------------------------------
Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/6203#discussion_r197419621
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/rest/handler/job/JobSubmitHandlerTest.java
---
@@ -71,7 +106,16 @@ public void testSerializationFailureHandling() throws
Exception {
@Test
public void testSuccessfulJobSubmission() throws Exception {
--- End diff --
should be extended to cover correct handling of uploaded jars and artifacts
> Parallelism of generated operators should have max parallism of input
> ---------------------------------------------------------------------
>
> Key: FLINK-9289
> URL: https://issues.apache.org/jira/browse/FLINK-9289
> Project: Flink
> Issue Type: Bug
> Components: DataSet API
> Affects Versions: 1.5.0, 1.4.2, 1.6.0
> Reporter: Fabian Hueske
> Assignee: Xingcan Cui
> Priority: Major
> Labels: pull-request-available
>
> The DataSet API aims to chain generated operators such as key extraction
> mappers to their predecessor. This is done by assigning the same parallelism
> as the input operator.
> If a generated operator has more than two inputs, the operator cannot be
> chained anymore and the operator is generated with default parallelism. This
> can lead to a {code}NoResourceAvailableException: Not enough free slots
> available to run the job.{code} as reported by a user on the mailing list:
> https://lists.apache.org/thread.html/60a8bffcce54717b6273bf3de0f43f1940fbb711590f4b90cd666c9a@%3Cuser.flink.apache.org%3E
> I suggest to set the parallelism of a generated operator to the max
> parallelism of all of its inputs to fix this problem.
> Until the problem is fixed, a workaround is to set the default parallelism at
> the {{ExecutionEnvironment}}:
> {code}
> ExecutionEnvironment env = ...
> env.setParallelism(2);
> {code}
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