[ 
https://issues.apache.org/jira/browse/FLINK-8756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16389172#comment-16389172
 ] 

ASF GitHub Bot commented on FLINK-8756:
---------------------------------------

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

    https://github.com/apache/flink/pull/5573#discussion_r172756524
  
    --- Diff: 
flink-clients/src/main/java/org/apache/flink/client/program/rest/RestClusterClient.java
 ---
    @@ -389,6 +393,27 @@ public String cancelWithSavepoint(JobID jobId, 
@Nullable String savepointDirecto
                });
        }
     
    +   @Override
    +   public Map<String, Object> getAccumulators(final JobID jobID) throws 
Exception {
    +           final JobAccumulatorsHeaders accumulatorsHeaders = 
JobAccumulatorsHeaders.getInstance();
    +           final JobAccumulatorsMessageParameters accMsgParams = 
accumulatorsHeaders.getUnresolvedMessageParameters();
    +           accMsgParams.jobPathParameter.resolve(jobID);
    +           
accMsgParams.queryParameter.resolve(Collections.singletonList(true));
    +
    +           CompletableFuture<JobAccumulatorsInfo> responseFuture = 
sendRequest(
    +                   accumulatorsHeaders,
    +                   accMsgParams
    +           );
    +
    +           return responseFuture.thenApply((JobAccumulatorsInfo 
accumulatorsInfo) -> {
    +                   if (accumulatorsInfo != null && 
accumulatorsInfo.getSerializedUserAccumulators() != null) {
    +                           return 
accumulatorsInfo.getSerializedUserAccumulators();
    --- End diff --
    
    the accumulators should be deserialized via 
`SerializedValue#deserialize(ClassLoader)` .
    
    If `Map<String, Object> getAccumulators(JobID jobID, ClassLoader loader)` 
(that also should be overridden) was called use the passed in `ClassLoader`, 
otherwise `ClassLoader.getSystemClassLoader()`.


> Support ClusterClient.getAccumulators() in RestClusterClient
> ------------------------------------------------------------
>
>                 Key: FLINK-8756
>                 URL: https://issues.apache.org/jira/browse/FLINK-8756
>             Project: Flink
>          Issue Type: Improvement
>          Components: Client
>    Affects Versions: 1.5.0
>            Reporter: Aljoscha Krettek
>            Assignee: vinoyang
>            Priority: Blocker
>             Fix For: 1.5.0
>
>




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