[ruby-dev:44802] [ruby-trunk - Bug #5577][Open] test/testunit/test_parallel.rb causes NoMethodError when file descriptor is limited to 30.

[Akira Tanaka <akr@fsij.org>]

Issue #5577 has been reported by Akira Tanaka.

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Bug #5577: test/testunit/test_parallel.rb causes NoMethodError when file descriptor is limited to 30.
http://redmine.ruby-lang.org/issues/5577

Author: Akira Tanaka
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2011-11-06 trunk 33645) [x86_64-linux]


ulimit -n 30 として、file descriptor を 30個に制限した状態で、
test/testunit/test_parallel.rb をテストすると以下のように失敗します。

失敗する事自体は問題ではないのですが、
  undefined method `close' for nil:NilClass (NoMethodError)
  NoMethodError: undefined method `chomp' for nil:NilClass
などと存在しないメソッドを呼んでしまっているのはよろしくないのではないでしょうか。

失敗の原因がわかるメッセージが出ると良いのではないかと思います。

  % (ulimit -n 30; make test-all TESTS='test/testunit/test_parallel.rb')
  ./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- --disable-gems "./test/runner.rb" --ruby="./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- --disable-gems" test/testunit/test_parallel.rb
  Run options: "--ruby=./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- --disable-gems"

  # Running tests:

  .FFFF/home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:138:in `run'
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:156:in `<main>'
  F/home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:138:in `run'
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:156:in `<main>'
  F/home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:138:in `run'
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:156:in `<main>'
  E/home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:138:in `run'
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:156:in `<main>'
  F/home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:138:in `run'
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:156:in `<main>'
  F/home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:138:in `run'
	  from /home/akr/ruby/tst2/ruby/test/testunit/../../lib/test/unit/parallel.rb:156:in `<main>'
  F

  Finished tests in 5.751803s, 1.9124 tests/s, 1.9124 assertions/s.

    1) Failure:
  test_jobs_status(TestParallel::TestParallel) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:177]:
  Expected /\d+=ptest_(first|second|third|forth) */ to match "Run options: --ruby \"./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems\" -j t1 --jobs-status\n\n# Running tests:\n\n/home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)\n\tfrom /home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:138:in `run'\n\tfrom /home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:156:in `<main>'\n\nSome worker was crashed. It seems ruby interpreter's bug\nor, a bug of test/unit/parallel.rb. try again without -j\noption.\n\n".

    2) Failure:
  test_no_retry_option(TestParallel::TestParallel) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:171]:
  Expected /^ +\d+\) Failure:\ntest_fail_at_worker\(TestD\)/ to match "Run options: --ruby \"./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems\" -j t1 --no-retry\n\n# Running tests:\n\n/home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)\n\tfrom /home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:138:in `run'\n\tfrom /home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:156:in `<main>'\n\nSome worker was crashed. It seems ruby interpreter's bug\nor, a bug of test/unit/parallel.rb. try again without -j\noption.\n\n".

    3) Failure:
  test_should_retry_failed_on_workers(TestParallel::TestParallel) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:164]:
  Expected /^Retrying\.+$/ to match "Run options: --ruby \"./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems\" -j t1\n\n# Running tests:\n\n/home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)\n\tfrom /home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:138:in `run'\n\tfrom /home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:156:in `<main>'\n\nSome worker was crashed. It seems ruby interpreter's bug\nor, a bug of test/unit/parallel.rb. try again without -j\noption.\n\n".

    4) Failure:
  test_should_run_all_without_any_leaks(TestParallel::TestParallel) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:158]:
  Expected /^[SF\.]{7}$/ to match "Run options: --ruby \"./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems\" -j t1\n\n# Running tests:\n\n/home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:137:in `ensure in run': undefined method `close' for nil:NilClass (NoMethodError)\n\tfrom /home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:138:in `run'\n\tfrom /home/akr/ruby/tst2/ruby/lib/test/unit/parallel.rb:156:in `<main>'\n\nSome worker was crashed. It seems ruby interpreter's bug\nor, a bug of test/unit/parallel.rb. try again without -j\noption.\n\n".

    5) Failure:
  test_accept_run_command_multiple_times(TestParallel::TestParallelWorker) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:64]:
  Expected /^ready/ to match nil.

    6) Failure:
  test_run(TestParallel::TestParallelWorker) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:40]:
  Expected /^ready/ to match nil.

    7) Failure:
  test_run_multiple_testcase_in_one_file(TestParallel::TestParallelWorker) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:51]:
  Expected /^ready/ to match nil.

    8) Failure:
  test_quit(TestParallel::TestParallelWorker) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:116]:
  Expected /^bye$/m to match "".

    9) Failure:
  test_done(TestParallel::TestParallelWorker) [/home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:96]:
  Expected /^done (.+?)$/ to match nil.

   10) Error:
  test_p(TestParallel::TestParallelWorker):
  NoMethodError: undefined method `chomp' for nil:NilClass
      /home/akr/ruby/tst2/ruby/test/testunit/test_parallel.rb:86:in `block in test_p'

  11 tests, 11 assertions, 9 failures, 1 errors, 0 skips

  ruby -v: ruby 2.0.0dev (2011-11-06 trunk 33645) [x86_64-linux]
  make: *** [yes-test-all] エラー 10
  zsh: exit 2     ( ulimit -n 30; make test-all TESTS='test/testunit/test_parallel.rb'; )
  % ./ruby -v
  ruby 2.0.0dev (2011-11-06 trunk 33645) [x86_64-linux]




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