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test: move test-net-connect-handle-econnrefused to sequential #27014

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test: move test-net-connect-handle-econnrefused to sequential #27014

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lpinca
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@lpinca lpinca commented Mar 30, 2019

First commit:

test: move test-net-connect-handle-econnrefused
    
The port used in the test could be taken by another process before
the callback of `server.close()` is called. Move it to sequential.
    
Refs: https://github.com/nodejs/node/pull/18257#discussion_r162717096
Fixes: https://github.com/nodejs/node/issues/26907

Second commit:

test: refactor net-connect-handle-econnrefused
    
- Remove unneeded server
- Use `common.PORT`
Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

@lpinca
test: move test-net-connect-handle-econnrefused
c1c2b5c 
The port used in the test could be taken by another process before
the callback of `server.close()` is called. Move it to sequential.

Refs: nodejs#18257 (comment)
Fixes: nodejs#26907
@lpinca
test: refactor net-connect-handle-econnrefused
325fd72 
- Remove unneeded server
- Use `common.PORT`
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@lpinca build started: https://ci.nodejs.org/blue/organizations/jenkins/node-test-pull-request-lite-pipeline/detail/node-test-pull-request-lite-pipeline/3108/pipeline

@nodejs-github-bot nodejs-github-bot added the test Issues and PRs related to the tests. label Mar 30, 2019
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mscdex commented Mar 30, 2019

I don't see how this really changes anything? common.PORT is not any more special than a random port as far as the OS is concerned, any other process could start listening on it.

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lpinca commented Mar 30, 2019 •
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@mscdex it is no longer run in parallel. First commit moves it to test/sequential. The assumption is that common.PORT is not taken of course. If that is not true a lot of tests in test/sequential will fails as well.

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mscdex commented Mar 30, 2019

Instead of moving this test, why don't we just try to connect to port 0 on localhost? That should always fail with ECONNREFUSED without any potential problems.

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lpinca commented Mar 30, 2019

Sounds good, will update in a bit.

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lpinca commented Mar 30, 2019 •
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@mscdex it doesn't work on Windows. A different errno/code is returned.

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mscdex commented Mar 30, 2019 •
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FWIW it looks like we could do this, but it's a little more involved for Windows. Instead of simply connecting to port 0 (which I think we could safely do for non-Windows) you can create a child process running the TCP server on a random port, suspend the process (doable via powershell), and then make connections to the server until you get ECONNREFUSED. It simulates the TCP backlog filling up and the OS rejecting new connections. I tried doing the same on Linux, but a stopped process there causes client connections to just hang and retry indefinitely it seems.

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What's the status here?

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lpinca commented Apr 16, 2019

Waiting for feedbacks/reviews. In my opinion @mscdex's latest suggestion is too complex to solve an issue with a test that has problem when run in parallel. We already have a dedicated set of tests running sequentially.

cc: @nodejs/testing

@Trott Trott added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Apr 16, 2019
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CI: https://ci.nodejs.org/job/node-test-pull-request/22483/

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lpinca commented Apr 26, 2019

@nodejs/collaborators any more opinions/suggestions?

lpinca added a commit to lpinca/node that referenced this pull request Apr 27, 2019
@lpinca
test: move test-net-connect-handle-econnrefused
f7afed1 
The port used in the test could be taken by another process before
the callback of `server.close()` is called. Move it to sequential.

PR-URL: nodejs#27014
Fixes: nodejs#26907
Refs: nodejs#18257 (comment)
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
lpinca added a commit to lpinca/node that referenced this pull request Apr 27, 2019
@lpinca
test: refactor net-connect-handle-econnrefused
66cf4b5 
- Remove unneeded server
- Use `common.PORT`

PR-URL: nodejs#27014
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
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lpinca commented Apr 27, 2019 •
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Landed in eca71e5...66cf4b5.

@lpinca lpinca closed this Apr 27, 2019
targos pushed a commit that referenced this pull request Apr 27, 2019
@lpinca @targos
test: move test-net-connect-handle-econnrefused
e9021cc 
The port used in the test could be taken by another process before
the callback of `server.close()` is called. Move it to sequential.

PR-URL: #27014
Fixes: #26907
Refs: #18257 (comment)
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
targos pushed a commit that referenced this pull request Apr 27, 2019
@lpinca @targos
test: refactor net-connect-handle-econnrefused
50732c1 
- Remove unneeded server
- Use `common.PORT`

PR-URL: #27014
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
@targos targos mentioned this pull request Apr 27, 2019
Merged
@lpinca lpinca deleted the gh-26907 branch April 27, 2019 17:43
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@Trott Trott Trott approved these changes

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@lpinca @nodejs-github-bot @mscdex @BridgeAR @Trott @benjamingr