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IO.popen(cmd, "w+") generates a non-writable pipe in JRuby 9.0.1.0 #3369

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artificial-guru opened this issue Oct 4, 2015 · 1 comment
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IO.popen(cmd, "w+") generates a non-writable pipe in JRuby 9.0.1.0 #3369

artificial-guru opened this issue Oct 4, 2015 · 1 comment
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Invalid or Duplicate

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@artificial-guru
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The following code works in JRuby 1.7.22:

cmd = "C:/Lang/R/x64/bin/xterm.exe --ess --slave"
engine = IO.popen(cmd, "w+")
engine.write("x <- 20")

The same code generates the following error message in JRuby 9.0.1.0:

IOError: not opened for writing
  write at org/jruby/RubyIO.java:1437
  write at org/jruby/RubyIO.java:1411

My underlying platform is JDK 8 (x64), update 60 on Windows 10.

jruby 9.0.1.0 (2.2.2) 2015-09-02 583f336 Java HotSpot(TM) 64-Bit Server VM 25.60-b23 on 1.8.0_60-b27 +jit [Windows 10-amd64]
@headius
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headius commented Sep 18, 2019

This is a known issue with subprocess IO on Windows and still remains an issue. However we have #4964 and others that document this issue. Since this is almost four years old and duplicated by others, I'm going to close it.

@headius headius closed this as completed Sep 18, 2019
@headius headius added this to the Invalid or Duplicate milestone Sep 18, 2019
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@headius @artificial-guru