[jira] [Comment Edited] (FLINK-8949) Rest API failure with long URL

["Chesnay Schepler (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-8949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16400326#comment-16400326 ] 

Chesnay Schepler edited comment on FLINK-8949 at 3/15/18 12:41 PM:
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huh, well that's a problem.

Unfortunately the UI actually requires the watermark for each subtask, otherwise we could've just queried the aggregated minimum instead.

The metric querying was always a bit verbose but I don't see us reworking that anytime soon; although with the aggregating handlers we conceptually know how to do it,

I guess we'll just have to batch the requests in multiples of 50\(?) or something.


was (Author: zentol):
huh, well that's a problem.

Unfortunately the UI actually requires the watermark for each subtask, otherwise we could've just queried the aggregated minimum instead.

The metric querying was always a bit verbose but I don't see us reworking that anytime soon; although with the aggregating handlers we conceptually know how to do it,

I guess we'll just have to batch the requests in multiples of 50(?) or something.

> Rest API failure with long URL
> ------------------------------
>
>                 Key: FLINK-8949
>                 URL: https://issues.apache.org/jira/browse/FLINK-8949
>             Project: Flink
>          Issue Type: Bug
>          Components: REST, Webfrontend
>    Affects Versions: 1.5.0, 1.4.2
>            Reporter: Truong Duc Kien
>            Priority: Major
>
> When you have jobs with high parallelism, the URL for a REST request can get very long. When the URL is longer than 4096 bytes, the  REST API will return error
> {{Failure: 404 Not Found}}
>  This can easily be seen in the Web UI, when Flink queries for the watermark using the REST API:
> {{GET /jobs/:jobId/vertices/:vertexId/metrics?get=0.currentLowWatermark,1.currentLowWatermark,2.currentLo...}}
> The request will fail with more than 170 subtasks and the watermark will not be displayed in the Web UI.



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