Thanks Zhanghao for initialing this discussion, I have just one comment:
I checked the classes `SubtasksAllAccumulatorsHandler`,
`SubtasksTimesHandler`, `SubtaskCurrentAttemptDetailsHandler`,
`JobVertexTaskManagersHandler` and `JobExceptionsHandler` you mentioned in
`Public Interfaces` and they are not annotated as `Public`. So do you want
to annotate them as `Plublic`? If not, I think you may need to move them
from `Public Interfaces` to `Proposed Changes`.
Best,
Shammon FY
On Sat, Sep 9, 2023 at 12:11 PM Chen Zhanghao <zhanghao.c...@outlook.com>
wrote:
> Hi Devs,
>
> I would like to start a discussion on FLIP-363: Unify the Representation
> of TaskManager Location in REST API and Web UI [1].
>
> The TaskManager location of subtasks is important for identifying
> TM-related problems. There are a number of places in REST API and Web UI
> where TaskManager location is returned/displayed.
>
> Problems:
>
> * Only hostname is provided to represent TaskManager location in some
> places (e.g. SubtaskCurrentAttemptDetailsHandler). However, in a
> containerized era, it is common to have multiple TMs on the same host, and
> port info is crucial to distinguish different TMs.
> * Inconsistent naming of the field to represent TaskManager location:
> "host" is used in most places but "location" is also used in
> JobExceptions-related places.
> * Inconsistent semantics of the "host" field: The semantics of the
> host field are inconsistent, sometimes it denotes hostname only while in
> other times it denotes hostname + port (which is also inconsistent with the
> name of "host").
>
> We propose to improve the current situation by:
>
> * Use a field named "location" that represents TaskManager location in
> the form of "${hostname}:${port}" in a consistent manner across REST APIs
> and the front-end.
> * Rename the column name from "Host" to "Location" on the Web UI to
> reflect the change that both hostname and port are displayed.
> * Keep the old "host" fields untouched for compatibility. They can be
> removed in the next major version.
>
> Looking forward to your feedback.
>
> [1] FLIP-363: Unify the Representation of TaskManager Location in REST API
> and Web UI - Apache Flink - Apache Software Foundation<
> https://cwiki.apache.org/confluence/display/FLINK/FLIP-363%3A+Unify+the+Representation+of+TaskManager+Location+in+REST+API+and+Web+UI
> >
>
> Best,
> Zhanghao Chen
>
