[GitHub] [incubator-druid] mcbrewster opened a new pull request #8219: Web-Console: stop log from making request after dialog close, implement query manager

[GitBox <gi...@apache.org>]

mcbrewster opened a new pull request #8219: Web-Console: stop log from making request after dialog close, implement query manager
URL: https://github.com/apache/incubator-druid/pull/8219
 
 
   <img width="294" alt="Screen Shot 2019-08-01 at 10 18 58 AM" src="https://user-images.githubusercontent.com/37322608/62313908-b5a96a00-b446-11e9-9aa7-dc205a01f03a.png">
   
   Previously when you close the show log dialog the Timeout would continue to make network requests to get a task log. This is no longer the case. Additionally queries were made without a query manager which prompted the memory leak error. A query manager has been implemented to stop this. 
   
   ### Description
   
   added tail-query manager and a showlog query manager that handle the network request and the timeout respectively. This should protect against memory leaks as well as be consistent with the way queries work across the console.
   
   Clear timeout in the component will unmount lifecycle hook. 
   #### Fixed the bug ...
   #### Renamed the class ...
   #### Added a forbidden-apis entry ...
   
   This PR has:
   - [x ] been self-reviewed.
      - [ ] using the [concurrency checklist](https://github.com/apache/incubator-druid/blob/master/dev/code-review/concurrency.md) (Remove this item if the PR doesn't have any relation to concurrency.)
   - [ ] added documentation for new or modified features or behaviors.
   - [ ] added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links.
   - [ ] added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
   - [ ] added unit tests or modified existing tests to cover new code paths.
   - [ ] added integration tests.
   - [ ] been tested in a test Druid cluster.
   <img width="294" alt="Screen Shot 2019-08-01 at 10 18 58 AM" src="https://user-images.githubusercontent.com/37322608/62313903-b2ae7980-b446-11e9-9225-79bf4b0b7014.png">
   

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