On Centos 8 a glibc libary update (via e.g.
yum update -y),
may cause a reset of the locale to:
LANG= LC_CTYPE="POSIX" LC_NUMERIC="POSIX" (...) LC_ALL=
Javaapplications to fallback to:
java.nio.charset.Charset.defaultCharset() => US-ASCII (and some investigation work
to find out the proper name of attendees with non-US characters in their name for the airhacks.live or airhacks.com
event registrations :-))
localedef -i en_US -f UTF-8 en_US.UTF-8 fixes the problem, but may lead to another one:
[error] character map file `UTF-8' not found: No such file or directory [error] default character map file `ANSI_X3.4-1968' not found: No such file or directory
yum -y install glibc-locale-source prior to
localedef -i en_US -f UTF-8 en_US.UTF-8
installs the missing files and changes back the locale.
locale reports again:
LANG=en_US.UTF-8 LC_CTYPE="en_US.UTF-8" LC_NUMERIC="en_US.UTF-8" (...) LC_ALL=
The Java 11 docker image in docklands already contains the here described fix.