[jira] [Comment Edited] (FLINK-6477) The first time to click Taskmanager cannot get the actual data

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

    [ https://issues.apache.org/jira/browse/FLINK-6477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16002633#comment-16002633 ] 

Chesnay Schepler edited comment on FLINK-6477 at 5/9/17 12:55 PM:
------------------------------------------------------------------

This is an artifact as to how the web-frontend communicates with the backend for requesting metrics, and how these are metrics retrieved from the TaskManagers.

The Frontend requests the metrics from the backend. The backend kicks off an asynchronous update to the stored metrics, but returns the current state for the metrics as is, so as to not block the netty thread.

Typically this is only visible on the very first access to any page that relies on metrics.

How do you intend to fix this? You would have to send an answer to the web-frontend ansynchronously and I'm not sure if that is currently possible.


was (Author: zentol):
This is an artifact as to how the web-frontend communicates with the backend for requesting metrics, and how these metrics retrieved from the TaskManagers.

The Frontend requests the metrics from the backend. The backend kicks off an asynchronous update to the stored metrics, but returns the current state for the metrics as is, so as to not block the netty thread.

Typically this is only visible on the very first access to any page that relies on metrics.

How do you intend to fix this? You would have to send an answer to the web-frontend ansynchronously and I'm not sure if hat is currently possible.

> The first time to click Taskmanager cannot get the actual data
> --------------------------------------------------------------
>
>                 Key: FLINK-6477
>                 URL: https://issues.apache.org/jira/browse/FLINK-6477
>             Project: Flink
>          Issue Type: Bug
>          Components: Webfrontend
>    Affects Versions: 1.2.0
>            Reporter: zhihao chen
>            Assignee: zhihao chen
>         Attachments: errDisplay.jpg
>
>
> Flink web page first click Taskmanager to get less than the actual data, when the parameter “jobmanager.web.refresh-interval” is set to a larger value, eg: 1800000, if you do not manually refresh the page you need to wait time after the timeout normal display



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)