Kotlin await hangs in docker (alpine image)

[picaso]

I am not sure if this is a Kotlin coroutines problem or a docker problem.

On Mac when we run any function via IntelliJ or Command line that returns Deferred object and call await() on it, it works wonderfully.

On Docker, it just hangs indefinitely. This is more apparent if there are nested async calls. The team has tried so hard to figure out why and I am hoping the solution is something trivial.

[fvasco]

Can you provide an example and the thread dump (kill -3 1 in the container)?

[elizarov]

Can you reproduce this problem with some small self-contained test?

[svd27]

I have noted similar problems on Travis. Tests that run fine on my machine start hanging on Travis.
I think one problem is that CommonPool limits the thread count to no of CPUs - 1. This seems to make coroutine operations to hang on travis machines.
I would propose some property that can be set like: -Dkotlinx.coroutines.commonPool.minThreads = 2

[qwwdfsad]

Could you please show self-contained reproducer which hangs on Travis?

I think one problem is that CommonPool limits the thread count to no of CPUs - 1

This case is properly handled: (Runtime.getRuntime().availableProcessors() - 1).coerceAtLeast(1)

[svd27]

Actually I was taking about that piece of code. It means on a one or two CPU system it limits CommonPool to one thread.
This lead for me to deadlock problems on Travis.

[qwwdfsad]

I'm closing this issue after fixing #343 and #432

Feel free to create a new one if a problem is reproducible with 0.24.0