JRuby

[windows] Process' wait, wait2, waitpid are not supported

Details

  • Type: Bug Bug
  • Status: Open Open
  • Priority: Major Major
  • Resolution: Unresolved
  • Affects Version/s: JRuby 1.4
  • Fix Version/s: None
  • Component/s: Windows
  • Labels:
    None
  • Number of attachments :
    0

Description

This code fails in jruby on doze

require 'timeout'
out = nil
begin
Timeout::timeout(ARGV[1].to_i)

{ out = IO.popen ARGV[2..-1].join(' ') Process.wait out.pid # <----- this line fails in jruby, not in MRI. }

rescue Timeout::Error
puts 'timed out'
Process.kill "KILL", out.pid
end

jruby: C:/dev/ruby/ruby-benchmark-suite/utils/timeout2.rb:16: waitpid unsupported on this platform (NotImplementedError)

ruby MRI works.
Thanks.
-r

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Vladimir Sizikov added a comment -

See waitpid() implementation in win32/win32.c in MRI sources. Tricky!

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Vladimir Sizikov added a comment - See waitpid() implementation in win32/win32.c in MRI sources. Tricky!
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Vladimir Sizikov added a comment -

Leads to multiple Process' RubySpec failures on Windows:

jruby 1.5.0.dev (ruby 1.8.7 patchlevel 174) (2010-01-25 c933515) (Java HotSpot(TM) Client VM 1.6.0_18) [x86-java]


1)
An exception occurred during: before :all ERROR
NotImplementedError: wait unsupported on this platform
D:/work/jruby-dev/rubyspec.git/core/process/wait_spec.rb:5
D:/work/jruby-dev/rubyspec.git/core/process/wait_spec.rb:3
D:/work/jruby-dev/rubyspec.git/core/process/wait_spec.rb:55:in `load'
D:/work/jruby-dev/mspec.git/bin/mspec-ci:8

2)
An exception occurred during: before :all ERROR
NotImplementedError: wait unsupported on this platform
D:/work/jruby-dev/rubyspec.git/core/process/wait2_spec.rb:7
D:/work/jruby-dev/rubyspec.git/core/process/wait2_spec.rb:3
D:/work/jruby-dev/rubyspec.git/core/process/wait2_spec.rb:55:in `load'
D:/work/jruby-dev/mspec.git/bin/mspec-ci:8

3)
An exception occurred during: before :all ERROR
NotImplementedError: wait unsupported on this platform
D:/work/jruby-dev/rubyspec.git/core/process/waitall_spec.rb:5
D:/work/jruby-dev/rubyspec.git/core/process/waitall_spec.rb:3
D:/work/jruby-dev/rubyspec.git/core/process/waitall_spec.rb:55:in `load'
D:/work/jruby-dev/mspec.git/bin/mspec-ci:8
Show
Vladimir Sizikov added a comment - Leads to multiple Process' RubySpec failures on Windows: jruby 1.5.0.dev (ruby 1.8.7 patchlevel 174) (2010-01-25 c933515) (Java HotSpot(TM) Client VM 1.6.0_18) [x86-java] 1) An exception occurred during: before :all ERROR NotImplementedError: wait unsupported on this platform D:/work/jruby-dev/rubyspec.git/core/process/wait_spec.rb:5 D:/work/jruby-dev/rubyspec.git/core/process/wait_spec.rb:3 D:/work/jruby-dev/rubyspec.git/core/process/wait_spec.rb:55:in `load' D:/work/jruby-dev/mspec.git/bin/mspec-ci:8 2) An exception occurred during: before :all ERROR NotImplementedError: wait unsupported on this platform D:/work/jruby-dev/rubyspec.git/core/process/wait2_spec.rb:7 D:/work/jruby-dev/rubyspec.git/core/process/wait2_spec.rb:3 D:/work/jruby-dev/rubyspec.git/core/process/wait2_spec.rb:55:in `load' D:/work/jruby-dev/mspec.git/bin/mspec-ci:8 3) An exception occurred during: before :all ERROR NotImplementedError: wait unsupported on this platform D:/work/jruby-dev/rubyspec.git/core/process/waitall_spec.rb:5 D:/work/jruby-dev/rubyspec.git/core/process/waitall_spec.rb:3 D:/work/jruby-dev/rubyspec.git/core/process/waitall_spec.rb:55:in `load' D:/work/jruby-dev/mspec.git/bin/mspec-ci:8
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Roger Pack added a comment -

another example:

irb(main):001:0> IO.popen("false")

{|pipe| Process.waitpid2 pipe.pid }

NotImplementedError: waitpid unsupported on this platform
from (irb):2

Show
Roger Pack added a comment - another example: irb(main):001:0> IO.popen("false") {|pipe| Process.waitpid2 pipe.pid } NotImplementedError: waitpid unsupported on this platform from (irb):2
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Roger Pack added a comment -

I guess what MRI does is maintain a weakref map of PID's to handles so it can do an equivalent of a waitFor on them...

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Roger Pack added a comment - I guess what MRI does is maintain a weakref map of PID's to handles so it can do an equivalent of a waitFor on them...
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Roger Pack added a comment -

My current work around (for followers) is to loop doing Process.kill(0, pid) until it raises an exception, which means the process has ended.

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Roger Pack added a comment - My current work around (for followers) is to loop doing Process.kill(0, pid) until it raises an exception, which means the process has ended.

People

  • Assignee:
    Unassigned
    Reporter:
    Roger Pack
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Dates

  • Created:
    Updated: