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What determines whether Process.kill is supported? #3244

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lukehorvat opened this issue Aug 11, 2015 · 4 comments
Closed

What determines whether Process.kill is supported? #3244

lukehorvat opened this issue Aug 11, 2015 · 4 comments
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core ffi JRuby 1.7.x
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Won't Fix

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@lukehorvat
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Hi, I'm attempting to run a Rails app on a Raspberry Pi as a WAR file (packaged via Warbler).

I get this error because I'm using Process.kill throughout my codebase:

file:/tmp/jruby6309588954101406081extract/gems/gems/jruby-jars-1.7.21/lib/jruby-core-1.7.21.jar!/jruby/kernel/jruby/process_manager.rb:28 warning: executable? does not in this environment and will return a dummy value
Exiting
ERROR: org.jruby.exceptions.RaiseException: (NotImplementedError) kill unsupported or native support failed to load

So what determines whether Process.kill is supported? Given that Raspbian is POSIX, I'd have thought it would just work?
@rtyler
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rtyler commented Aug 17, 2015

The RubyProcess class implements Process.kill and I believe that where this code is actually coming from is in the jnr-posix library, perhaps from here.

I would bet dollars to donuts that this is something to do with some native libraries not being present for your arm platform.

@lukehorvat
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Yep, I think you're right. The call to loadNativePOSIX here must be returning null or throwing an exception.

Killing the process via backticks (i.e. kill #{pid}) works, but it's not ideal. Do you think I should raise an issue on jnr-posix?

@rtyler
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rtyler commented Aug 18, 2015

@lukehorvat it certainly can't hurt, if you've got a small ruby script that spawns and then attempts to kill the child process, that would also help I think

@lukehorvat lukehorvat mentioned this issue Aug 18, 2015
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@enebo enebo added this to the Won't Fix milestone May 16, 2017
@enebo
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enebo commented May 16, 2017

1.7.x is EOL and this will not get fixed. Marking WONTFIX

@enebo enebo closed this as completed May 16, 2017
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core ffi JRuby 1.7.x
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@enebo @rtyler @lukehorvat