flaky: parallel/test-http2-large-write-multiple-requests

Test

parallel/test-http2-large-write-multiple-requests

Platform

Linux x64

Console output

not ok 2765 parallel/test-http2-large-write-multiple-requests
16:22:27   ---
16:22:27   duration_ms: 120028.14200
16:22:27   severity: fail
16:22:27   exitcode: -15
16:22:27   stack: |-
16:22:27     timeout
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16:22:27   ...
16:22:27 ok 2766 parallel/test-snapshot-typescript
16:22:27   ---

Build links

https://ci.nodejs.org/job/node-test-commit-linux-containered/nodes=ubuntu2204_sharedlibs_smallicu_x64/42674/

Additional information

No response

hmm, maybe we can add an unref'ed timer in the test that logs out the active handles after around 1 minute to figure out what's keeping the process alive..

again - https://ci.nodejs.org/job/node-test-commit-linux-containered/nodes=ubuntu2204_sharedlibs_withoutintl_x64/42904/

Failed again - https://ci.nodejs.org/job/node-test-commit-osx/nodes=osx11-x64/59933/

again - https://ci.nodejs.org/job/node-test-binary-windows-js-suites/RUN_SUBSET=2,nodes=win2019-COMPILED_BY-vs2022/28880/ on this PR

again - https://ci.nodejs.org/job/node-test-commit-linux-containered/nodes=ubuntu2204_sharedlibs_withoutintl_x64/44960

Again - https://ci.nodejs.org/job/node-test-commit-linux/nodes=ubuntu2204-64/59826/

I'm unable to reproduce locally on macOS:

$ ./tools/test.py --repeat 9999 -t 2 test/parallel/test-http2-large-write-multiple-requests.js 
[05:07|% 100|+ 9999|-   0]: Done                                              

All tests passed.

I can reproduce on Ubuntu

$ ./tools/test.py --repeat=10000 test/parallel/test-http2-large-write-multiple-requests.js
=== release test-http2-large-write-multiple-requests ===
Path: parallel/test-http2-large-write-multiple-requests

...

Command: out/Release/node /home/luigi/node/test/parallel/test-http2-large-write-multiple-requests.js
--- TIMEOUT ---

...

[05:05|%  99|+ 9996|-   3]: Done

Failed tests:
out/Release/node /home/luigi/node/test/parallel/test-http2-large-write-multiple-requests.js
out/Release/node /home/luigi/node/test/parallel/test-http2-large-write-multiple-requests.js
out/Release/node /home/luigi/node/test/parallel/test-http2-large-write-multiple-requests.js

Similarly to parallel/test-net-write-fully-async-hex-string, the test correctly finishes but the process does not exit. The following patch

diff --git a/test/parallel/test-http2-large-write-multiple-requests.js b/test/parallel/test-http2-large-write-multiple-requests.js
index bcbb1434cb..b5a698e47f 100644
--- a/test/parallel/test-http2-large-write-multiple-requests.js
+++ b/test/parallel/test-http2-large-write-multiple-requests.js
@@ -1,4 +1,5 @@
 'use strict';
+// Flags: --jitless
 const common = require('../common');
 if (!common.hasCrypto)
   common.skip('missing crypto');

fixes the issue for both tests on my machine.

I'm able to relatively quickly reproduce on https://ci.nodejs.org/computer/test%2Dibm%2Drhel8%2Dx64%2D3/

After attaching gdb to the hanging process, I get this:

Attaching to program: /home/iojs/build/workspace/node-test-commit-linux/node, process 3703811
[New LWP 3703812]
[New LWP 3703813]
[New LWP 3703814]
[New LWP 3703815]
[New LWP 3703816]
[New LWP 3703817]
[New LWP 3703825]
[New LWP 3703826]
[New LWP 3703827]
[New LWP 3703828]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
0x00007f1be59dc48c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
Missing separate debuginfos, use: yum debuginfo-install glibc-2.28-251.el8_10.2.x86_64 libgcc-8.5.0-22.el8_10.x86_64 libstdc++-8.5.0-22.el8_10.x86_64
(gdb) bt
#0  0x00007f1be59dc48c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000001fea079 in uv_cond_wait (cond=<optimized out>, mutex=<optimized out>) at ../deps/uv/src/unix/thread.c:814
#2  0x000000000105d48b in node::NodePlatform::DrainTasks(v8::Isolate*) ()
#3  0x0000000000eb0dc2 in node::SpinEventLoopInternal(node::Environment*) ()
#4  0x000000000101f0b2 in node::NodeMainInstance::Run() ()
#5  0x0000000000f71782 in node::Start(int, char**) ()
#6  0x00007f1be56327e5 in __libc_start_main () from /lib64/libc.so.6
#7  0x0000000000eade0e in _start ()

I'm starting to believe that all these random timeouts are related to these:
#47450
#47297
#47452
#47461

In other words, a revert of e600de9 might make the issues much easier to reproduce on fast CPUs

FWIW, I get no failures (for this test) with the patch from #47452 applied on main.

I confirm. Let's reopen that pull request.

The are a bunch of other tests that fail with that patch, though.

Haven't seen this fail much in the last year or so. Closing it now. Free to reopen if needed.

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flaky: parallel/test-http2-large-write-multiple-requests #52550

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flaky: parallel/test-http2-large-write-multiple-requests #52550

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joyeecheung commented on Apr 17, 2024

mhdawson commented on Apr 25, 2024

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