play hangs on console interacton when using jblas library about playframework HOT 4 OPEN

The issue still occurs with sbt 1.9.9 (Play 2.9).

I understand this is a low priority issue.

from playframework.

So this is most likely caused by

• #11061
• (or maybe #11064 but I doubt that)

Which version of sbt are you using in your project/build.properties? Please try with sbt version 1.7.2 when using Play 2.8.12+ or sbt 1.9.7 when using Play 2.9 or 3.0 and let me know if that fixes the problem.

However, given that this is working on Linux and "only" broken on Windows and the fact that this very likely is a problem only in dev mode, but should work fine in prod mode, I will not spend time to fix this problem. Also probably sbt magic is involved here as well...

If you want to fix this, I am happy to review a pull request. But I am not going to look further into this issue at this point.

from playframework.

Yes, it works fine in prod mode, only dev mode is affected.

The issue still occurs with sbt 1.7.2 (Play 2.8.12) and sbt 1.9.7 (Play 2.9).

We can run Play using:

 echo | set /p dummyName=abc | sbt run

This passes the string "abc" (no new line, this is important) to Play input,
which satisfies the need for Play/sbt to consume some input, and jblas is working fine.

But after this Java process causes high CPU usage permanently :(

I can't fix it this myself, sbt and scala are black magic to me.

from playframework.

For the sake of completeness, can you also try sbt 1.9.9? (I don't expect it to work actually, but they did upgrade Jline in the release, so who knows)
Like said I will not prioritize this issue currently since it's "only" broken when using Windows, in dev mode, when pulling in the jblas library. Maybe someone steps up to invest time, also in case that's you I am happy to review a pull request.
Thanks for reporting anyway!

from playframework.