[CI][Java][Flight] Test failure on s390x

[asfimport]

Seems to happen quite reliably on Travis-CI:
https://app.travis-ci.com/github/apache/arrow/builds/249511328

Reporter: Antoine Pitrou / @pitrou

PRs and other links:

• GitHub Pull Request #12913
• GitHub Pull Request #13271

_{Note: This issue was originally created as ARROW-16218. Please see the migration documentation for further details.}

[asfimport]

Antoine Pitrou / @pitrou:
cc @kiszk @kou

[asfimport]

David Li / @lidavidm:
Ah, it seems netty's JNI library doesn't have an s390x build, we should remove the dependency or make it platform-specific somehow.

[asfimport]

David Li / @lidavidm:
Or actually, we manually install them, but we forgot to bump the versions when we upgraded the Netty version:

arrow/ci/scripts/java_build.sh

Line 29 in fae66cb

if [[ "$(uname -s)" == "Linux" ]] && [[ "$(uname -m)" == "s390x" ]]; then

[asfimport]

David Li / @lidavidm:
I put up a candidate PR for now to just skip this on s390

[asfimport]

Kazuaki Ishizaki / @kiszk:
I know JNI libraries should be updated for the latest netty. However, the latest netty includes more JNIs. Thus, at first, we need to identify which JNI libraries are required.

[pitrou]

We have no s390x builds anymore, closing as outdated.