[Bug 2054943] Re: jruby: mri-extra - flaky TestOpen3 pipe tests

[Vladimir Petko]

** Description changed:

  The autopkgtests for jruby fail  `mri-extra` with the following errors:
  
    1) Failure:
  TestOpen3#test_pipeline_start [/tmp/autopkgtest.Dz4xQk/autopkgtest_tmp/test/mri/test_open3.rb:303]:
  Failed assertion, no message given.
  
    2) Failure:
  TestOpen3#test_pipeline_w [/tmp/autopkgtest.Dz4xQk/autopkgtest_tmp/test/mri/test_open3.rb:288]:
  <true> expected but was
  <false>.
  
    3) Failure:
  TestOpen3#test_capture3_flip [/tmp/autopkgtest.Dz4xQk/autopkgtest_tmp/test/mri/test_open3.rb:190]:
  
  The minimal reproducer of those:
  ----
  require 'open3'
  
  RUBY = 'jruby'
  Open3.pipeline_r([RUBY, '-e', 'print "1"'],
                       [RUBY, '-e', 'print STDIN.read + "2"']) {|o,ts|
        print(o.read)
      }
  ---
  
  executing the above sample results in the following output:
  # jruby test.rb
  12# jruby test.rb
  12# jruby test.rb
  12# jruby test.rb
  12# jruby test.rb
  2# jruby test.rb
  12# jruby test.rb
  2# jruby test.rb
  12# jruby test.rb
  2# jruby test.rb
  2# jruby test.rb
  2# jruby test.rb
  2# jruby test.rb
  12# jruby test.rb
  12# jruby test.rb
  2Errno::EPIPE: Broken pipe - <STDOUT>
     write at org/jruby/RubyIO.java:1569
     write at org/jruby/RubyIO.java:1458
     write at org/jruby/RubyIO.java:2829
     print at org/jruby/RubyIO.java:1831
     print at org/jruby/RubyKernel.java:649
    <main> at -e:1
  
  Note: the failure occurs both with Java 21
+ The root cause is that pipes are created non-blocking with Java 21.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to java-common in Ubuntu.
https://bugs.launchpad.net/bugs/2054943

Title:
  jruby: mri-extra - flaky TestOpen3  pipe tests

Status in java-common package in Ubuntu:
  New
Status in jruby package in Ubuntu:
  New
Status in openjdk-21 package in Ubuntu:
  New
Status in jruby package in Debian:
  Unknown

Bug description:
  The autopkgtests for jruby fail  `mri-extra` with the following
  errors:

    1) Failure:
  TestOpen3#test_pipeline_start [/tmp/autopkgtest.Dz4xQk/autopkgtest_tmp/test/mri/test_open3.rb:303]:
  Failed assertion, no message given.

    2) Failure:
  TestOpen3#test_pipeline_w [/tmp/autopkgtest.Dz4xQk/autopkgtest_tmp/test/mri/test_open3.rb:288]:
  <true> expected but was
  <false>.

    3) Failure:
  TestOpen3#test_capture3_flip [/tmp/autopkgtest.Dz4xQk/autopkgtest_tmp/test/mri/test_open3.rb:190]:

  The minimal reproducer of those:
  ----
  require 'open3'

  RUBY = 'jruby'
  Open3.pipeline_r([RUBY, '-e', 'print "1"'],
                       [RUBY, '-e', 'print STDIN.read + "2"']) {|o,ts|
        print(o.read)
      }
  ---

  executing the above sample results in the following output:
  # jruby test.rb
  12# jruby test.rb
  12# jruby test.rb
  12# jruby test.rb
  12# jruby test.rb
  2# jruby test.rb
  12# jruby test.rb
  2# jruby test.rb
  12# jruby test.rb
  2# jruby test.rb
  2# jruby test.rb
  2# jruby test.rb
  2# jruby test.rb
  12# jruby test.rb
  12# jruby test.rb
  2Errno::EPIPE: Broken pipe - <STDOUT>
     write at org/jruby/RubyIO.java:1569
     write at org/jruby/RubyIO.java:1458
     write at org/jruby/RubyIO.java:2829
     print at org/jruby/RubyIO.java:1831
     print at org/jruby/RubyKernel.java:649
    <main> at -e:1

  Note: the failure occurs both with Java 21
  The root cause is that pipes are created non-blocking with Java 21.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/java-common/+bug/2054943/+subscriptions