[#58149] [ruby-trunk - Feature #9076][Open] New one-argument block syntax: &. — "asterite (Ary Borenszweig)" <ary@...>

23 messages 2013/11/04

[#58176] [ruby-trunk - Bug #9082][Open] popen3 hangs when stderr gets lots of output — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

15 messages 2013/11/05

[#58207] [ruby-trunk - Bug #9089][Open] rb_fix2uint no longer raises a RangeError when given negative values — "NoKarma (Arthur Schreiber)" <schreiber.arthur@...>

9 messages 2013/11/06

[#58243] [ruby-trunk - Feature #9098][Open] Indent heredoc against the left margin by default when "indented closing identifier" is turned on. — "sikachu (Prem Sichanugrist)" <s@...>

24 messages 2013/11/09

[#58306] [ruby-trunk - Bug #9106][Open] 'gem install' doesn't copy .so files of ext libs — "tagomoris (Satoshi TAGOMORI)" <tagomoris@...>

15 messages 2013/11/13

[#58324] [ruby-trunk - Feature #9108][Open] Hash sub-selections — "wardrop (Tom Wardrop)" <tom@...>

28 messages 2013/11/14

[#58342] [ruby-trunk - Feature #9112][Open] Make module lookup more dynamic (Including modules into a module after it has already been included) — "PragTob (Tobias Pfeiffer)" <pragtob@...>

16 messages 2013/11/14

[#58350] [ruby-trunk - Feature #9113][Open] Ship Ruby for Linux with jemalloc out-of-the-box — "sam.saffron (Sam Saffron)" <sam.saffron@...>

59 messages 2013/11/15

[#58374] [ruby-trunk - Bug #9115][Open] Logger traps all exceptions; breaks Timeout — "cphoenix (Chris Phoenix)" <cphoenix@...>

10 messages 2013/11/16

[#58375] [ruby-trunk - Feature #9116][Open] String#rsplit missing — "artagnon (Ramkumar Ramachandra)" <artagnon@...>

12 messages 2013/11/16

[#58396] [ruby-trunk - Bug #9121][Open] [PATCH] Remove rbtree implementation of SortedSet due to performance regression — "xshay (Xavier Shay)" <contact@...>

15 messages 2013/11/18

[#58404] [ruby-trunk - Feature #9123][Open] Make Numeric#nonzero? behavior consistent with Numeric#zero? — "sferik (Erik Michaels-Ober)" <sferik@...>

40 messages 2013/11/18

[#58411] [ruby-trunk - Bug #9124][Open] TestSocket errors in test-all on Arch 64-bit — "jonforums (Jon Forums)" <redmine@...>

14 messages 2013/11/18

[#58438] [ruby-trunk - Bug #9129][Open] Regression in support for IPv6 literals in URIs with Net::HTTP — "kallistec (Daniel DeLeo)" <dan@...>

11 messages 2013/11/19

[#58545] [ruby-trunk - Feature #9145][Open] Queue#pop(true) return nil if empty instead of raising ThreadError — "jsc (Justin Collins)" <redmine@...>

9 messages 2013/11/24

[#58653] [ruby-trunk - Bug #9170][Open] Math.sqrt returns different types when mathn is included; breaks various gems - this bug can be reproduced in Ruby 1.8 as well — "kranzky (Jason Hutchens)" <JasonHutchens@...>

7 messages 2013/11/28

[ruby-core:58177] [ruby-trunk - Bug #9082] popen3 hangs when stderr gets lots of output

From: "jeremyevans0 (Jeremy Evans)" <merch-redmine@...>
Date: 2013-11-05 22:14:47 UTC
List: ruby-core #58177
Issue #9082 has been updated by jeremyevans0 (Jeremy Evans).


I think this is expected behavior, not a bug. Your test.rb program blocks outputting to stderr because the pipe buffer gets filled.  The reason it works for less output to stderr is that the program exits before the stderr pipe buffer is full.  The reason it works if you read stderr before stdout is that you drain the stderr pipe buffer, allowing the program to exit.
----------------------------------------
Bug #9082: popen3 hangs when stderr gets lots of output
https://bugs.ruby-lang.org/issues/9082#change-42763

Author: rosenfeld (Rodrigo Rosenfeld Rosas)
Status: Open
Priority: Normal
Assignee: 
Category: lib
Target version: 
ruby -v: ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-linux]
Backport: 


Create this program test.rb:

STDERR.puts "some error line\n" * 10_000

Then, try this:

ruby -r open3 -e "Open3.popen3('ruby test.rb'){|i,o,e,t|i.close;o.read}"

For this particular case, if I do "e.read" before "o.read" it works. But for my real case involving the "tidy" command with lots of warnings in the stderr it will freeze even if I call "e.read". Since I don't really need this output, I'm using popen2 and redirecting stderr to /dev/null, so this is not urgent, but I thought you'd like to know about this.

Also, if you replace 10_000 with 1_000 above it also works here.


-- 
http://bugs.ruby-lang.org/

In This Thread