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https://issues.apache.org/jira/browse/FLINK-9280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16523319#comment-16523319
 ] 

ASF GitHub Bot commented on FLINK-9280:
---------------------------------------

Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/6203#discussion_r198033040
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/job/JobSubmitHandler.java
 ---
    @@ -54,18 +69,89 @@ public JobSubmitHandler(
     
        @Override
        protected CompletableFuture<JobSubmitResponseBody> 
handleRequest(@Nonnull HandlerRequest<JobSubmitRequestBody, 
EmptyMessageParameters> request, @Nonnull DispatcherGateway gateway) throws 
RestHandlerException {
    -           JobGraph jobGraph;
    -           try {
    -                   ObjectInputStream objectIn = new ObjectInputStream(new 
ByteArrayInputStream(request.getRequestBody().serializedJobGraph));
    -                   jobGraph = (JobGraph) objectIn.readObject();
    -           } catch (Exception e) {
    -                   throw new RestHandlerException(
    -                           "Failed to deserialize JobGraph.",
    -                           HttpResponseStatus.BAD_REQUEST,
    -                           e);
    +           Collection<Path> uploadedFiles = request.getUploadedFiles();
    --- End diff --
    
    I agree that nio `Paths` are more powerful. I'm just wondering whether we 
actually need this flexibility here. Usually it is a good idea to make the 
interface as restrictive as possible and widen it on demand.
    
    Moreover, there is also Flink's `Path` which comes with a bit of different 
semantics. For example, you have the safety net for closing open file streams 
which is also used to interrupt I/O operations which are otherwise not 
interruptible. Mixing the nio paths in there, might give the false impression 
that this also applies to them.
    
    So I'm just saying that we should make this decision consciously and not 
only based on which type is more convenient to be used.


> Extend JobSubmitHandler to accept jar files
> -------------------------------------------
>
>                 Key: FLINK-9280
>                 URL: https://issues.apache.org/jira/browse/FLINK-9280
>             Project: Flink
>          Issue Type: New Feature
>          Components: Job-Submission, REST
>    Affects Versions: 1.5.0
>            Reporter: Chesnay Schepler
>            Assignee: Chesnay Schepler
>            Priority: Critical
>              Labels: pull-request-available
>             Fix For: 1.6.0, 1.5.1
>
>
> The job submission through the CLI first uploads all require jars to the blob 
> server, sets the blob keys in the jobgraph, and then uploads this graph to 
> The {{JobSubmitHandler}} which submits it to the Dispatcher.
> This process has the downside that it requires jars to be uploaded to the 
> blobserver before submitting the job graph, which does not happen via REST.
> I propose an extension to the the {{JobSubmitHandler}} to also accept an 
> optional list of jar files, that were previously uploaded through the 
> {{JarUploadHandler}}. If present, the handler would upload these jars to the 
> blobserver and set the blob keys.



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