MartijnVisser opened a new pull request, #29187: URL: https://github.com/apache/flink/pull/29187
## What is the purpose of the change Backport of FLINK-39105, fixed on master and release-2.3 by fdc2686e33d and not backported. `RestClientTest.testConnectionTimeout` connects to `240.0.0.0` with a 1ms connection timeout and asserts `ConnectTimeoutException`. A runner without a route gets an immediate rejection from the OS instead, which Netty reports as `AnnotatedSocketException`. Both are `SocketException` subtypes, so the assertion now expects that, and `hasMessageContaining(unroutableIp)` still pins the destination. Last occurrence on this branch in the nightly of 2026-09-15, `test_cron_adaptive_scheduler core`: https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=79075 ## Brief change log * `RestClientTest.testConnectionTimeout` expects `SocketException` instead of `ConnectTimeoutException` ## Verifying this change This change is already covered by existing tests, such as `RestClientTest`. * The condition does not occur locally. Pointing `unroutableIp` at `2001:db8:0:0:0:0:0:1` and running with `-Djava.net.preferIPv4Stack=true` makes the OS reject the connect first, which gives the same `AnnotatedSocketException`. Under that condition the test fails on the base commit and passes with this change. * `RestClientTest`, the architecture tests, `spotless:check` and `checkstyle:check` pass on this branch. ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): no - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: no - The serializers: no - The runtime per-record code paths (performance sensitive): no - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? no - If yes, how is the feature documented? not applicable --- ##### Was generative AI tooling used to co-author this PR? - [X] Yes (please specify the tool below) Generated-by: Claude Code (Claude Opus 5) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
