Investigate flaky parallel/test-gc-http-client

[Trott]

• Version: 11.0.0-pre (master)
• Platform: freebsd11-x64
• Subsystem: test

https://ci.nodejs.org/job/node-test-commit-freebsd/19681/nodes=freebsd11-x64/console

00:08:04 not ok 694 parallel/test-gc-http-client
00:08:04   ---
00:08:04   duration_ms: 0.545
00:08:04   severity: fail
00:08:04   exitcode: 1
00:08:04   stack: |-
00:08:04     We should do 500 requests
00:08:04     Done: 0/500
00:08:04     Collected: 0/154
00:08:04     events.js:167
00:08:04           throw er; // Unhandled 'error' event
00:08:04           ^
00:08:04     
00:08:04     Error: connect ECONNRESET 127.0.0.1:15615 - Local (127.0.0.1:27660)
00:08:04         at internalConnect (net.js:933:16)
00:08:04         at defaultTriggerAsyncIdScope (internal/async_hooks.js:294:19)
00:08:04         at GetAddrInfoReqWrap.emitLookup [as callback] (net.js:1080:9)
00:08:04         at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:62:10)
00:08:04     Emitted 'error' event at:
00:08:04         at Socket.socketErrorListener (_http_client.js:399:9)
00:08:04         at Socket.emit (events.js:182:13)
00:08:04         at emitErrorNT (internal/streams/destroy.js:82:8)
00:08:04         at emitErrorAndCloseNT (internal/streams/destroy.js:50:3)
00:08:04         at process._tickCallback (internal/process/next_tick.js:63:19)
00:08:04   ...

[joyeecheung]

This also timeouts from time to time. In the last 100 runs:

Reason     parallel/test-gc-http-client
Type       JS_TEST_FAILURE
Failed PR  5 (#22291, #22289, #22286, #22074, #22152)
Appeared   test-digitalocean-ubuntu1604_sharedlibs_container-x64-10, test-digitalocean-freebsd11-x64-1, test-digitalocean-ubuntu1604_sharedlibs_container-x64-9, test-digitalocean-ubuntu1604_sharedlibs_container-x64-8, test-digitalocean-ubuntu1604_sharedlibs_container-x64-7
First CI   https://ci.nodejs.org/job/node-test-pull-request/16401/
Last CI    https://ci.nodejs.org/job/node-test-pull-request/16420/

Example:

not ok 759 parallel/test-gc-http-client
  ---
  duration_ms: 480.47
  severity: fail
  exitcode: -15
  stack: |-
    timeout
    We should do 500 requests
    Done: 0/500
    Collected: 0/11
    Done: 0/500
    Collected: 0/22
    Done: 0/500
    Collected: 0/33
    Done: 0/500
    Collected: 0/44
    Done: 11/500
    Collected: 0/55
    Done: 22/500
    Collected: 0/66
    Done: 33/500
    Collected: 11/77
    Done: 44/500
    Collected: 22/88
    Done: 55/500
    Collected: 33/99
    Done: 66/500
    Coll...

[Trott]

Again today: https://ci.nodejs.org/job/node-test-commit-freebsd/19713/nodes=freebsd11-x64/console

03:34:55 not ok 728 parallel/test-gc-http-client
03:34:55   ---
03:34:55   duration_ms: 0.398
03:34:55   severity: fail
03:34:55   exitcode: 1
03:34:55   stack: |-
03:34:55     We should do 500 requests
03:34:55     Done: 0/500
03:34:55     Collected: 0/198
03:34:55     events.js:167
03:34:55           throw er; // Unhandled 'error' event
03:34:55           ^
03:34:55     
03:34:55     Error: connect ECONNRESET 127.0.0.1:65483 - Local (127.0.0.1:10142)
03:34:55         at internalConnect (net.js:933:16)
03:34:55         at defaultTriggerAsyncIdScope (internal/async_hooks.js:294:19)
03:34:55         at GetAddrInfoReqWrap.emitLookup [as callback] (net.js:1080:9)
03:34:55         at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:62:10)
03:34:55     Emitted 'error' event at:
03:34:55         at Socket.socketErrorListener (_http_client.js:399:9)
03:34:55         at Socket.emit (events.js:182:13)
03:34:55         at emitErrorNT (internal/streams/destroy.js:82:8)
03:34:55         at emitErrorAndCloseNT (internal/streams/destroy.js:50:3)
03:34:55         at process._tickCallback (internal/process/next_tick.js:63:19)
03:34:55   ...

[BridgeAR]

I just had a look at this one and I opened a PR as fix.