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process: load internal/async_hooks before inspector hooks registration #26866

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merged 1 commit into from
Mar 23, 2019
Merged

process: load internal/async_hooks before inspector hooks registration #26866

merged 1 commit into from
Mar 23, 2019

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joyeecheung
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@joyeecheung joyeecheung commented Mar 22, 2019 •
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Otherwise the exports of internal/async_hooks may be undefined
when the inspector async hooks are registered.

Refs: #26859
Fixes: #26798

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

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@joyeecheung build started: https://ci.nodejs.org/blue/organizations/jenkins/node-test-pull-request-lite-pipeline/detail/node-test-pull-request-lite-pipeline/3012/pipeline

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CI: https://ci.nodejs.org/job/node-test-pull-request/21808/
Stress test of this PR: https://ci.nodejs.org/job/node-stress-single-test/2187/
Stress test of master: https://ci.nodejs.org/job/node-stress-single-test/2188/

@joyeecheung joyeecheung mentioned this pull request Mar 22, 2019
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@Trott Trott added author ready PRs that have at least one approval, no pending requests for changes, and a CI started. process Issues and PRs related to the process subsystem. inspector Issues and PRs related to the V8 inspector protocol async_hooks Issues and PRs related to the async hooks subsystem. labels Mar 22, 2019
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joyeecheung commented Mar 22, 2019 •
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I found a setup in internal/async_hooks that makes the module non-side-effect free..not sure it's relevant, but I moved those bits out in bootstrap/node.js to make it more obvious. @Trott PTAL

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CI: https://ci.nodejs.org/job/node-test-pull-request/21809/
New stress test: https://ci.nodejs.org/job/node-stress-single-test/2189/

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refack commented Mar 22, 2019

New stress test: https://ci.nodejs.org/job/node-stress-single-test/2189/

That one was set to stress win10. This should be more relevant -
https://ci.nodejs.org/job/node-stress-single-test/2190/

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BTW, this reminds me of..

node/lib/internal/process/execution.js

Lines 92 to 98 in 6e9551e

// XXX(joyeecheung): for some reason this cannot be defined at the top-level
// and exported to be written to process._fatalException, it has to be
// returned as an *anonymous function* wrapped inside a factory function,
// otherwise it breaks the test-timers.setInterval async hooks test -
// this may indicate that node::FatalException should fix up the callback scope
// before calling into process._fatalException, or this function should
// take extra care of the async hooks before it schedules a setImmediate.

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joyeecheung commented Mar 22, 2019 •
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That one was set to stress win10. This should be more relevant -
https://ci.nodejs.org/job/node-stress-single-test/2190/

Right, I always forget that you need to check the box after the label..
Stress test for master with win2008r2-vs2017: https://ci.nodejs.org/job/node-stress-single-test/2191/

Trott
Trott reviewed Mar 22, 2019
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lib/internal/bootstrap/node.js

// XXX(joyeecheung): this has to be done after the initial load of
// `internal/async_hooks` otherwise `async_hooks` cannot require
// `internal/async_hooks`. Investigate why.
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These three lines of comments can be removed now?

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I don't think the lines added above answers this question..the bug seems to lie in the module loading order or the scope resolution somehow. So I'd prefer to keep it until we figure out why..

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Looks like the order of calling setupHooks is not the key here: https://ci.nodejs.org/job/node-stress-single-test/2192/ for cede98c is still green. (though it improves the spaghetti a bit..)

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Trott commented Mar 22, 2019

(Is it worth fast-tracking this?)

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joyeecheung commented Mar 23, 2019 •
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@Trott It should fix a flake that fails 18 out of 58 CI jobs, and it's rather trivial..so I guess it should be fine fast-tracking this.

For comparison:

This PR (green): https://ci.nodejs.org/job/node-stress-single-test/2190/
Master (red, 23 out of 100 failed): https://ci.nodejs.org/job/node-stress-single-test/2191/

cc @nodejs/testing please thumb this up if you are +1 to fast-tracking

@joyeecheung joyeecheung added the fast-track PRs that do not need to wait for 48 hours to land. label Mar 23, 2019
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Trott commented Mar 23, 2019

@nodejs/async_hooks Would be great to get this fast-tracked (see above comment) to fix a significant CI issue.

@joyeecheung @refack
process: load internal/async_hooks before inspector hooks registration
0d21299 
Otherwise the exports of `internal/async_hooks` may be undefined
when the inspector async hooks are registered.

PR-URL: nodejs#26866
Fixes: nodejs#26798
Refs: nodejs#26859
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
@refack refack removed the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Mar 23, 2019
@refack refack merged commit 0d21299 into nodejs:master Mar 23, 2019
targos pushed a commit to targos/node that referenced this pull request Mar 27, 2019
@joyeecheung @targos
process: load internal/async_hooks before inspector hooks registration
6e48d8f 
Otherwise the exports of `internal/async_hooks` may be undefined
when the inspector async hooks are registered.

PR-URL: nodejs#26866
Fixes: nodejs#26798
Refs: nodejs#26859
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
targos pushed a commit that referenced this pull request Mar 27, 2019
@joyeecheung @targos
process: load internal/async_hooks before inspector hooks registration
41761cc 
Otherwise the exports of `internal/async_hooks` may be undefined
when the inspector async hooks are registered.

PR-URL: #26866
Fixes: #26798
Refs: #26859
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
@targos targos mentioned this pull request Mar 27, 2019
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investigate flaky test-inspect-async-hook-setup-at-inspect on Windows 2008r2 in CI
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