Error on Jruby installation

[MTEKode]

Hi,
I have a problem installing grpc gem on jruby.
I had google-protobuf installed successfully.
I test it on:

• JRUBY 9.1.7.0
• JRUBY 9.1.8.0
• JRUBY 9.1.9.0

Gem::Ext::BuildError: ERROR: Failed to build gem native extension:
 current directory:
 /Volumes/FdData/Users/mToribio/.rvm/gems/jruby-9.1.7.0/gems/grpc-1.2.5/src/ruby/ext/grpc
 /Volumes/FdData/Users/mToribio/.rvm/rubies/jruby-9.1.7.0/bin/jruby -r
 ./siteconf20170517-1426-j7em7a.rb extconf.rb
 NoMethodError: undefined method `+' for nil:NilClass
   <main> at extconf.rb:66
 *** extconf.rb failed ***
 Could not create Makefile due to some reason, probably lack of necessary
 libraries and/or headers.  Check the mkmf.log file for more details.  You may
 need configuration options.
 
 Provided configuration options:
 	--with-opt-dir
 	--without-opt-dir
 	--with-opt-include
 	--without-opt-include=${opt-dir}/include
 	--with-opt-lib
 	--without-opt-lib=${opt-dir}/lib
 	--with-make-prog
 	--without-make-prog
 	--srcdir=.
 	--curdir
 	--ruby=/Volumes/FdData/Users/mToribio/.rvm/rubies/jruby-9.1.7.0/bin/jruby
 
 extconf failed, exit code 1
 
 Gem files will remain installed in
 /Volumes/FdData/Users/mToribio/.rvm/gems/jruby-9.1.7.0/gems/grpc-1.2.5 for
 inspection.
 Results logged to
 /Volumes/FdData/Users/mToribio/.rvm/gems/jruby-9.1.7.0/extensions/universal-java-1.8/2.3.0/grpc-1.2.5/gem_make.out
 
 An error occurred while installing grpc (1.2.5), and Bundler cannot continue.
 Make sure that `gem install grpc -v '1.2.5'` succeeds before bundling.
 
 Process finished with exit code 5

Thanks you.

[MTEKode]

#6705

[apolcyn]

jruby isn't supported in grpc. And unfortunately in the near future, there's no plan to add support, due to the work needed. Going to close as there's discussion in #6705