I started seeing an issue in my project after enabling the configuration cache where KGP's allTests ...

# gradle

[eygraber]

I started seeing an issue in my project after enabling the configuration cache where KGP's allTests task hangs and never completes when the configuration cache wasn't able to be reused. I have some thread dumps, but I'm not sure if I should file an issue with Gradle or Kotlin. Any pointers?

[Adam Semenenko]

1. Is the project open source? Could you share a reproducer?
2. What versions of KGP, Gradle (and ./gradlew --version) are you using?
3. What other Gradle plugins are used?
4. What KMP targets are enabled? If you disable the targets one-by-one, does it show that one target is a problem?
5. Do other tasks, like ./gradlew build, also hang?
6. Could you share the console output? (in Slack you can do 'create snippet' to share a large text output)

[tapchicoma]

Could you share the console output?

Better Gradle build scan + Kotlin daemon logs

[eygraber]

1. https://github.com/eygraber/sqldelight-androidx-driver/
2. Kotlin 2.2.0 Gradle 9.0.0
3. Detekt, AtomicFu
4. Android, ios, Jvm, Linux, Mac
5. No

Gradle build scan + Kotlin daemon logs

I can't get the build scan because the build never completes. I will try to get the daemon logs when I repro again

[eygraber]

Untitled

Untitled

[Adam Semenenko]

so it's stuck on Extracting dependency...? 🤔

[eygraber]

I don't think so, but it's not clear. I thought that just happened to be the last thing that was logged.

[eygraber]

Here are two thread dumps from after it hung

threaddump.txtthreaddump2.txt

[Adam Semenenko]

one of the test classes is AndroidxSqliteConcurrencyIntegrationTest... given that enabling CC means tests from different projects can run at the same time, maybe one of the tests is locking a shared resource?

[Adam Semenenko]

AndroidxSqliteConcurrencyIntegrationTest is in commonTest, so it will be run multiple times (once for each target). When CC is enabled, the test tasks will run in parallel, so concurrency_integration.db will be opened multiple times simultaneously

[eygraber]

I believe I addressed that previously, but maybe I missed something. Running allTests again after killing the hanging one seems to work though.

[Adam Semenenko]

override var type: AndroidxSqliteDatabaseType = AndroidxSqliteDatabaseType.File("concurrency_integration-${Random.nextULong()}.db")

making the name random fixes it on my machine (just a quick fix - deleting the db after the test would be nicer)

[Adam Semenenko]

oh it's already deleted?

https://github.com/eygraber/sqldelight-androidx-driver/blob/9ec82fdd975c8056e943d8dc99a03d8eb9c33c04/integration/src/commonTest/kotlin/com/eygraber/sqldelight/androidx/driver/integration/AndroidxSqliteIntegrationTest.kt#L76

[eygraber]

Ah the issue is I already did this for AndroidxSqliteConcurrencyTest but not for AndroidxSqliteConcurrencyIntegrationTest 🙈

[Adam Semenenko]

I wonder... isn't runTest {} supposed to timeout? That would have helped reveal it wasn't a Gradle issue.

[eygraber]

Good point, maybe because it's blocking the whole thread and isn't participating in coroutines?

[Adam Semenenko]

worth looking into :)