Hi All,

As some of you already know, our next release will be a big one. Our goal will 
be to start releasing Apache Hop using Java 17 in stead of Java 11.
This upgrade is not without risks of some things breaking. To avoid this I am 
calling on all of you to help us.

Currently our builds are working and all our tests and integration tests are 
passing so from our point of view everything works.
There are 2 things we currently know that has changed:

• The Scripts transform:
Starting from Java 15 the default javascript engine has been removed, you can 
add it again by including a dependency that we can't ship due to license 
limitations. Information has been added to the docs
• Flink Runner currently does not work
The Flink runner doesn't work under java 17 yet. It is experimental in their 
current version 1.18 but this version is not yet supported by Apache Beam


We would love if you can start testing to see if everything is still working in 
your environments so we can handle this before the release (September).
You can make your own build using our code or grab a development build. To test 
the docker images you can use the 2.10.0-SNAPSHOT tag or Development tag.

Thanks for your help and feedback!

Hans

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