Issue #17220 has been updated by nobu (Nobuyoshi Nakada).
Status changed from Open to Third Party's Issue
`getaddrinfo_a` seems to create a thread, and it will be lost by `fork`.
I'm not sure if this is a glibc's spec or bug.
This code demonstrates the behavior without Ruby.
```C
#define _GNU_SOURCE
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
int
test_gai(const char *where, const char *name)
{
printf("in %s: ", where);
fflush(stdout);
struct gaicb req = {.ar_name = name};
struct gaicb *reqs[1] = {&req};
int ret = getaddrinfo_a(GAI_NOWAIT, reqs, 1, NULL);
if (ret) goto error;
ret = gai_suspend((const struct gaicb **)reqs, 1, NULL);
if (ret) goto error;
ret = gai_error(reqs[0]);
if (ret) goto error;
struct addrinfo *ai = reqs[0]->ar_result;
if (ai) {
printf("%s\n", ai->ai_canonname ? ai->ai_canonname : "noname");
}
return 0;
error:
fprintf(stderr, "failed: %s\n", gai_strerror(ret));
return ret;
}
int
main(int argc, char **argv)
{
test_gai("parent", "localhost");
if (argc > 1) {
printf("sleeping...");
fflush(stdout);
usleep((useconds_t)(atof(argv[1])*1e6));
printf("\n");
}
pid_t pid = fork();
if (pid == 0) {
test_gai("child", "localhost");
return 0;
}
int status;
waitpid(pid, &status, 0);
return status;
}
```
```sh
$ gcc -o gaitest gaitest.c -lanl
$ ./gaitest 1
in parent: noname
sleeping...
in child: noname
$ ./gaitest 0.9
in parent: noname
sleeping...
in child: ^C
```
----------------------------------------
Bug #17220: Rails Active Job integration test fails with Ruby 3.0.0 since 2038cc6cab6ceeffef3ec3a765c70ae684f829ed
https://bugs.ruby-lang.org/issues/17220#change-88034
* Author: yahonda (Yasuo Honda)
* Status: Third Party's Issue
* Priority: Normal
* ruby -v: ruby 2.8.0dev (2020-08-27T07:39:13Z v3_0_0_preview1~397 2038cc6cab) [x86_64-linux]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
One of the Rails CI, Active Job integration test with sidekiq, against Ruby 3.0.0 has been failing since August 30, 2020.
According to `git bisect` is is triggered by 2038cc6cab6ceeffef3ec3a765c70ae684f829ed . Somehow this issue only reproduces with Ruby on Docker like `rubylang/ruby:master-nightly-bionic`
It does not reproduce if Ruby is installed locally using `rbenv install 3.0.0-dev` on Ubuntu 20.04 and macOS 11 beta.
### The first failed build job
https://buildkite.com/rails/rails/builds/71321#84b29655-b3df-4b5c-8b20-cbf15ecd9653
``` ruby
Ruby 2.8.0p-1 (2020-08-29 revision d7492a0be885ea9f2b9f71e3e95582f9a859c439) [x86_64-linux]
```
### The last successful build job
https://buildkite.com/rails/rails/builds/71143#369217f7-95f6-4ab9-8ef5-7c6364bd803e
```ruby
Ruby 2.8.0p-1 (2020-08-20 revision a74df67244199d1fd1f7a20b49dd5a096d2a13a2) [x86_64-linux]
```
### `git bisect` result
Performed `git bisect` ruby/ruby repository and it says `2038cc6cab6ceeffef3ec3a765c70ae684f829ed` triggers this build failure.
## Steps to reproduce
1. Install Docker
2. Install Ruby 2.7.1 (or whatever Ruby version to run rake)
3. Create Ruby docker image for 2038cc6cab6ceeffef3ec3a765c70ae684f829ed
```
git clone https://github.com/ruby/ruby-docker-images.git
cd ruby-docker-images
rake docker:build ruby_version=master:2038cc6cab6ceeffef3ec3a765c70ae684f829ed
```
4. Run Rails CI using the Docker image created in step 3
```
cd ~
git clone https://github.com/rails/rails.git
cd rails
git clone https://github.com/rails/buildkite-config .buildkite/
RUBY_IMAGE=rubylang/ruby:master-2038cc6cab6ceeffef3ec3a765c70ae684f829ed-bionic docker-compose -f .buildkite/docker-compose.yml build base && CI=1 docker-compose -f .buildkite/docker-compose.yml run default runner activejob 'AJ_ADAPTER=sidekiq AJ_INTEGRATION_TESTS=true bin/test test/integration/queuing_test.rb --seed 5170'
```
## Actual result
```
Using sidekiq
Run options: --seed 5170
# Running:
.SSSF
Failure:
QueuingTest#test_should_run_job_enqueued_in_the_future_at_the_specified_time [/rails/activejob/test/integration/queuing_test.rb:76]:
Expected false to be truthy.
bin/test test/integration/queuing_test.rb:71
.F
Failure:
QueuingTest#test_should_run_jobs_enqueued_on_a_listening_queue [/rails/activejob/test/integration/queuing_test.rb:14]:
Expected false to be truthy.
bin/test test/integration/queuing_test.rb:11
.SS..F
Failure:
QueuingTest#test_current_locale_is_kept_while_running_perform_later [/rails/activejob/test/integration/queuing_test.rb:102]:
Expected false to be truthy.
bin/test test/integration/queuing_test.rb:93
F
Failure:
QueuingTest#test_current_timezone_is_kept_while_running_perform_later [/rails/activejob/test/integration/queuing_test.rb:119]:
Expected false to be truthy.
bin/test test/integration/queuing_test.rb:110
..
Finished in 34.153644s, 0.4392 runs/s, 0.3514 assertions/s.
15 runs, 12 assertions, 4 failures, 0 errors, 5 skips
You have skipped tests. Run with --verbose for details.
```
## Expected result
It should success as the Ruby as of the previous commit `1035a3b202ee86bf2b0a1d00eefcfff0d7ab9f6b` does.
```
$ RUBY_IMAGE=rubylang/ruby:master-1035a3b202ee86bf2b0a1d00eefcfff0d7ab9f6b-bionic docker-compose -f .buildkite/docker-compose.yml build base && CI=1 docker-compose -f .buildkite/docker-compose.yml run default runner activejob 'AJ_ADAPTER=sidekiq AJ_INTEGRATION_TESTS=true bin/test test/integration/queuing_test.rb --seed 5170'
```
```
+++
+++ activejob: AJ_ADAPTER=sidekiq AJ_INTEGRATION_TESTS=true bin/test test/integration/queuing_test.rb --seed 5170
Using sidekiq
Run options: --seed 5170
# Running:
.SSS....SS.....
Finished in 13.647623s, 1.0991 runs/s, 1.0258 assertions/s.
15 runs, 14 assertions, 0 failures, 0 errors, 5 skips
You have skipped tests. Run with --verbose for details.
```
--
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