On Thu, 3 Oct 2024 19:13:46 GMT, Sebastian Lövdahl <d...@openjdk.org> wrote:
> The fix is twofold. > > 1. Stop the main container after an iteration is done. The main container is > started with its runtime defined as 120 seconds, which means that each > iteration takes 120 seconds. In reality, one iteration takes a few seconds > while 115 seconds is spent waiting on the main container exiting. > > 2. Change the name of the main container to be unique per iteration. > Containers are started with `--rm`, which means they are removed after > exiting. However, the removal is done asynchronously _after_ the `stop` > command has returned. This means that the second iteration may get an error > if the same container name is used if the removal was not done before the > container is started in the next iteration. > > On my machine, this cuts down the test runtime using Podman from 4m 13s to > 17s. Using Docker, the runtime goes from 4m 15s to 41s. > > Podman only runs half the test cases (since JDK-8341310) which explain some > of the difference. But there is also something strange going on in the Docker > case; every `docker stop` call takes 10 seconds, and I have not been able to > figure out what exactly causes it. > > Doing a manual `kill [container Java process PID]` gracefully terminates the > Java process and container, but `docker stop` never does. Instead, it blocks > for 10 seconds before abruptly killing the process using `SIGKILL`. I > confirmed this with a simplified case and both > `strace -e 'trace=!all' docker run --init eclipse-temurin:23 java ..` and > `strace -e 'trace=!all' docker run eclipse-temurin:23 java ..`, no signals > were ever visible when calling either `docker stop` or `docker kill`. > > https://www.docker.com/blog/docker-best-practices-choosing-between-run-cmd-and-entrypoint/ > and "What is PID 1 and why does it matter?" talks about why > [`--init`](https://docs.docker.com/reference/cli/docker/container/run/#init) > is supposed to help. This pull request has now been integrated. Changeset: da4b7a8c Author: Sebastian Lövdahl <sebastian.lovd...@hibox.tv> Committer: Kevin Walls <kev...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/da4b7a8c56f56c6051d463bc34e51e35781fe1a8 Stats: 57 lines in 3 files changed: 18 ins; 12 del; 27 mod 8341436: containers/docker/TestJcmdWithSideCar.java takes needlessly long to run Reviewed-by: kevinw, lmesnik ------------- PR: https://git.openjdk.org/jdk/pull/21331
