Flaky parallel/test-http-readable-data-event

[BridgeAR]

https://ci.nodejs.org/job/node-test-commit-linux-containered/3545/nodes=ubuntu1604_sharedlibs_debug_x64/console
https://ci.nodejs.org/job/node-test-commit-freebsd/16844/nodes=freebsd10-64/console
https://ci.nodejs.org/job/node-test-commit-freebsd/16849/nodes=freebsd10-64/console

14:15:11 not ok 859 parallel/test-http-readable-data-event
14:15:11   ---
14:15:11   duration_ms: 2.727
14:15:11   severity: fail
14:15:11   stack: |-
14:15:11     assert.js:80
14:15:11       throw new AssertionError(obj);
14:15:11       ^
14:15:11     
14:15:11     AssertionError [ERR_ASSERTION]: 'Hello World!Hello again later!' strictEqual 'Hello World!'
14:15:11         at IncomingMessage.res.on.common.mustCall (/home/iojs/build/workspace/node-test-commit-linux-containered/nodes/ubuntu1604_sharedlibs_debug_x64/test/parallel/test-http-readable-data-event.js:43:14)
14:15:11         at IncomingMessage.<anonymous> (/home/iojs/build/workspace/node-test-commit-linux-containered/nodes/ubuntu1604_sharedlibs_debug_x64/test/common/index.js:467:15)
14:15:11         at IncomingMessage.emit (events.js:182:13)
14:15:11         at IncomingMessage.Readable.read (_stream_readable.js:489:10)
14:15:11         at IncomingMessage.res.on.common.mustCall (/home/iojs/build/workspace/node-test-commit-linux-containered/nodes/ubuntu1604_sharedlibs_debug_x64/test/parallel/test-http-readable-data-event.js:36:20)
14:15:11         at IncomingMessage.<anonymous> (/home/iojs/build/workspace/node-test-commit-linux-containered/nodes/ubuntu1604_sharedlibs_debug_x64/test/common/index.js:467:15)
14:15:11         at IncomingMessage.emit (events.js:182:13)
14:15:11         at emitReadable_ (_stream_readable.js:537:12)
14:15:11         at process._tickCallback (internal/process/next_tick.js:174:19)

Ping @nodejs/http @nodejs/http2

[mcollina]

This is in on me. However, feel free to get to it if anyone has some spare cycles.

[Trott]

I'm able to replicate locally:

$ tools/test.py -j 96 --repeat 192 parallel/test-http-readable-data-event
=== release test-http-readable-data-event ===                    
Path: parallel/test-http-readable-data-event
assert.js:79
  throw new AssertionError(obj);
  ^

AssertionError [ERR_ASSERTION]: 'Hello World!Hello again later!' strictEqual 'Hello World!'
    at IncomingMessage.res.on.common.mustCall (/Users/trott/io.js/test/parallel/test-http-readable-data-event.js:43:14)
    at IncomingMessage.<anonymous> (/Users/trott/io.js/test/common/index.js:467:15)
    at IncomingMessage.emit (events.js:182:13)
    at IncomingMessage.Readable.read (_stream_readable.js:489:10)
    at IncomingMessage.res.on.common.mustCall (/Users/trott/io.js/test/parallel/test-http-readable-data-event.js:36:20)
    at IncomingMessage.<anonymous> (/Users/trott/io.js/test/common/index.js:467:15)
    at IncomingMessage.emit (events.js:182:13)
    at emitReadable_ (_stream_readable.js:537:12)
    at process._tickCallback (internal/process/next_tick.js:174:19)
Command: out/Release/node /Users/trott/io.js/test/parallel/test-http-readable-data-event.js
=== release test-http-readable-data-event ===                   
Path: parallel/test-http-readable-data-event
assert.js:79
  throw new AssertionError(obj);
  ^

AssertionError [ERR_ASSERTION]: 'Hello World!Hello again later!' strictEqual 'Hello World!'
    at IncomingMessage.res.on.common.mustCall (/Users/trott/io.js/test/parallel/test-http-readable-data-event.js:43:14)
    at IncomingMessage.<anonymous> (/Users/trott/io.js/test/common/index.js:467:15)
    at IncomingMessage.emit (events.js:182:13)
    at IncomingMessage.Readable.read (_stream_readable.js:489:10)
    at IncomingMessage.res.on.common.mustCall (/Users/trott/io.js/test/parallel/test-http-readable-data-event.js:36:20)
    at IncomingMessage.<anonymous> (/Users/trott/io.js/test/common/index.js:467:15)
    at IncomingMessage.emit (events.js:182:13)
    at emitReadable_ (_stream_readable.js:537:12)
    at process._tickCallback (internal/process/next_tick.js:174:19)
Command: out/Release/node /Users/trott/io.js/test/parallel/test-http-readable-data-event.js
=== release test-http-readable-data-event ===                   
Path: parallel/test-http-readable-data-event
assert.js:79
  throw new AssertionError(obj);
  ^

AssertionError [ERR_ASSERTION]: 'Hello World!Hello again later!' strictEqual 'Hello World!'
    at IncomingMessage.res.on.common.mustCall (/Users/trott/io.js/test/parallel/test-http-readable-data-event.js:43:14)
    at IncomingMessage.<anonymous> (/Users/trott/io.js/test/common/index.js:467:15)
    at IncomingMessage.emit (events.js:182:13)
    at IncomingMessage.Readable.read (_stream_readable.js:489:10)
    at IncomingMessage.res.on.common.mustCall (/Users/trott/io.js/test/parallel/test-http-readable-data-event.js:36:20)
    at IncomingMessage.<anonymous> (/Users/trott/io.js/test/common/index.js:467:15)
    at IncomingMessage.emit (events.js:182:13)
    at emitReadable_ (_stream_readable.js:537:12)
    at process._tickCallback (internal/process/next_tick.js:174:19)
Command: out/Release/node /Users/trott/io.js/test/parallel/test-http-readable-data-event.js
=== release test-http-readable-data-event ===                   
Path: parallel/test-http-readable-data-event
assert.js:79
  throw new AssertionError(obj);
  ^

AssertionError [ERR_ASSERTION]: 'Hello World!Hello again later!' strictEqual 'Hello World!'
    at IncomingMessage.res.on.common.mustCall (/Users/trott/io.js/test/parallel/test-http-readable-data-event.js:43:14)
    at IncomingMessage.<anonymous> (/Users/trott/io.js/test/common/index.js:467:15)
    at IncomingMessage.emit (events.js:182:13)
    at IncomingMessage.Readable.read (_stream_readable.js:489:10)
    at IncomingMessage.res.on.common.mustCall (/Users/trott/io.js/test/parallel/test-http-readable-data-event.js:36:20)
    at IncomingMessage.<anonymous> (/Users/trott/io.js/test/common/index.js:467:15)
    at IncomingMessage.emit (events.js:182:13)
    at emitReadable_ (_stream_readable.js:537:12)
    at process._tickCallback (internal/process/next_tick.js:174:19)
Command: out/Release/node /Users/trott/io.js/test/parallel/test-http-readable-data-event.js
[00:09|% 100|+ 188|-   4]: Done   
$

[Trott]

(Not specific to FreeBSD. Replicated on macOS.)

[Trott]

Moving to sequential would be a workaround.

[mcollina]

Potential fix in #19931.