Bug #67586 for Net-SSH-Perl: test '03-packet.t' hangs forever

Tue Apr 19 12:31:03 2011 sundial.services [...] gmail.com - Ticket created

Subject:

test '03-packet.t' hangs forever

In OS/X 10.6.7 (Snow Leopard) and probably elsewhere, test '03-packet.t' hangs forever; or, if not forever, certainly for an unreasonable amount of time. There is no useful output, e.g. in the Console Utility, to suggest any further diagnosis of this (probably several years old?) problem. --- (Standard Apple perl-release): Summary of my perl5 (revision 5 version 10 subversion 0) configuration: Platform: osname=darwin, osvers=10.0, archname=darwin-thread-multi-2level uname='darwin neige.apple.com 10.0 darwin kernel version 10.0.0d8: tue may 5 19:29:59 pdt 2009; root:xnu-1437.2~2release_i386 i386 ' config_args='-ds -e -Dprefix=/usr -Dccflags=-g -pipe -Dldflags= -Dman3ext=3pm -Duseithreads -Duseshrplib -Dinc_version_list=none -Dcc=gcc-4.2' hint=recommended, useposix=true, d_sigaction=define useithreads=define, usemultiplicity=define useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef use64bitint=define, use64bitall=define, uselongdouble=undef usemymalloc=n, bincompat5005=undef Compiler: cc='gcc-4.2', ccflags ='-arch x86_64 -arch i386 -arch ppc -g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -I/usr/local/include', optimize='-Os', cppflags='-g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -I/usr/local/include' ccversion='', gccversion='4.2.1 (Apple Inc. build 5646)', gccosandvers='' intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678 d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16 ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8 alignbytes=8, prototype=define Linker and Libraries: ld='gcc-4.2 -mmacosx-version-min=10.6', ldflags ='-arch x86_64 -arch i386 -arch ppc -L/usr/local/lib' libpth=/usr/local/lib /usr/lib libs=-ldbm -ldl -lm -lutil -lc perllibs=-ldl -lm -lutil -lc libc=/usr/lib/libc.dylib, so=dylib, useshrplib=true, libperl=libperl.dylib gnulibc_version='' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' ' cccdlflags=' ', lddlflags='-arch x86_64 -arch i386 -arch ppc -bundle -undefined dynamic_lookup -L/usr/local/lib' Characteristics of this binary (from libperl): Compile-time options: MULTIPLICITY PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP USE_64_BIT_ALL USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES USE_PERLIO USE_REENTRANT_API Locally applied patches: /Library/Perl/Updates/<version> comes before system perl directories installprivlib and installarchlib points to the Updates directory Built under darwin Compiled at Jun 24 2009 00:35:27

Tue Jun 12 14:27:16 2012 SREZIC [...] cpan.org - Correspondence added

On 2011-04-19 12:31:03, sundialservices wrote: Show quoted text

> In OS/X 10.6.7 (Snow Leopard) and probably elsewhere, test '03-packet.t' > hangs forever; or, if not forever, certainly for an unreasonable amount > of time. > > There is no useful output, e.g. in the Console Utility, to suggest any > further diagnosis of this (probably several years old?) problem. >

I observe the same problem with various perls (5.8.8 .. 5.14.0) on a FreeBSD system. Regards, Slaven

Tue Jun 12 14:27:17 2012 The RT System itself - Status changed from 'new' to 'open'

Tue Jun 12 17:02:12 2012 SREZIC [...] cpan.org - Correspondence added

More insight: The following script behaves differently on linux and freebsd 8.0: #!/usr/bin/perl -w $rin = ''; vec($rin,25,1) = 1; warn select $rin, undef, undef, undef; warn $!; __END__ On linux the output is (as expected): -1 at /tmp/select.pl line 4. Bad file descriptor at /tmp/select.pl line 5. On freebsd the script just hangs. It seems that this is a bug in freebsd which is described here http://www.freebsd.org/cgi/query-pr.cgi?pr=155606&cat= and probably fixed in freebsd 8.1. MacOSX and possibly other *BSDs may have the same problem. The tied filehandle hack in t/03-packet.t seems to trigger just this: it is using an invalid file descriptor (FILENO=25). In linux the select() call triggered by Net::SSH::Perl::Packet::read just fails silently, while in freebsd it hangs. Regards, Slaven

Mon Dec 03 07:44:18 2012 schwigon [...] cpan.org - Correspondence added

Hi! Please check whether the fix for Perl 5.15+ in the just uploaded Net::SSH::Perl v1.35 also helps this problem here. Kind regards, Steffen -- Steffen Schwigon <ss5@renormalist.net> Dresden Perl Mongers <http://dresden-pm.org/>

Mon Dec 03 14:03:04 2012 SREZIC [...] cpan.org - Correspondence added

On 2012-12-03 07:44:18, SCHWIGON wrote: Show quoted text

> Hi! > > Please check whether the fix for Perl 5.15+ in the just uploaded > Net::SSH::Perl v1.35 also helps this problem here.

Same problem with perl 5.16.0-RC0 on freebsd 8.0. The 03-packet.t test hangs. Regards, Slaven

Mon Dec 03 14:04:57 2012 SREZIC [...] cpan.org - Correspondence added

On 2012-12-03 14:03:04, SREZIC wrote: Show quoted text

> On 2012-12-03 07:44:18, SCHWIGON wrote:

> > Hi! > > > > Please check whether the fix for Perl 5.15+ in the just uploaded > > Net::SSH::Perl v1.35 also helps this problem here.

> > Same problem with perl 5.16.0-RC0 on freebsd 8.0. The 03-packet.t test > hangs.

And a pass with perl 5.14.2 on freebsd 9.0. Regards, Slaven

Tue Dec 04 03:35:32 2012 schwigon [...] cpan.org - Correspondence added

On Mon Dec 03 14:04:57 2012, SREZIC wrote: Show quoted text

> On 2012-12-03 14:03:04, SREZIC wrote:

> > On 2012-12-03 07:44:18, SCHWIGON wrote:

> > > Hi! > > > > > > Please check whether the fix for Perl 5.15+ in the just uploaded > > > Net::SSH::Perl v1.35 also helps this problem here.

> > > > Same problem with perl 5.16.0-RC0 on freebsd 8.0. The 03-packet.t test > > hangs.

> > And a pass with perl 5.14.2 on freebsd 9.0.

Hm, v1.31 contains a changelog entry - Prevent t/03-packet.t from hanging due to high file descriptor. (altblue at n0i.net, rt.cpan.org #6101) and that ticket and the 1.31 diff discuss the chosen filehandle (25) and that it can't neither lower for Test::More reasons(?) and is known to have problems with the shell. Could you please experiment with 03-packet.t, line 102 sub FILENO { 25 } and modify the 25 into something else (24, 23, ...) to get a hint of what values could work? Maybe from there we can continue to think about a solution. Thanks! Kind regards, Steffen -- Steffen Schwigon <ss5@renormalist.net> Dresden Perl Mongers <http://dresden-pm.org/>

Mon Dec 10 04:34:35 2012 schwigon [...] cpan.org - Reference to ticket #26656 added

Mon Dec 10 04:34:44 2012 schwigon [...] cpan.org - Reference by ticket #26656 added

Wed Aug 07 01:15:24 2013 sendwade [...] hotmail.com - Correspondence added

From:

sendwade [...] hotmail.com

On Tue Dec 04 03:35:32 2012, SCHWIGON wrote: Show quoted text

> Could you please experiment with 03-packet.t, line 102 > > sub FILENO { 25 } > > and modify the 25 into something else (24, 23, ...) > to get a hint of what values could work? Maybe from there > we can continue to think about a solution.

The test passes for me if I change 25 to 24: $ uname -a Darwin My-MacBook-Air.local 11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64 i386

Fri Aug 09 03:21:49 2013 schwigon [...] cpan.org - Correspondence added

On Wed Aug 07 01:15:24 2013, trwww wrote: Show quoted text

> On Tue Dec 04 03:35:32 2012, SCHWIGON wrote:

> > Could you please experiment with 03-packet.t, line 102 > > > > sub FILENO { 25 } > > > > and modify the 25 into something else (24, 23, ...) > > to get a hint of what values could work? Maybe from there > > we can continue to think about a solution.

> > The test passes for me if I change 25 to 24: > > $ uname -a > Darwin My-MacBook-Air.local 11.4.2 Darwin Kernel Version 11.4.2: Thu > Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64 > i386

Nice, thanks! I will try to create a new release using 24, together with some other pending patchsets. Let's see how that goes... Kind regards, Steffen -- Steffen Schwigon <ss5@renormalist.net> Dresden Perl Mongers <http://dresden-pm.org/>

Fri Aug 09 18:24:45 2013 schwigon [...] cpan.org - Correspondence added

Just uploaded v1.36 to CPAN which contains this "24 fix". Please give it a try, whoever had problems with that before. Thanks. Kind regards, Steffen -- Steffen Schwigon <ss5@renormalist.net> Dresden Perl Mongers <http://dresden-pm.org/>

Sat Aug 10 01:48:33 2013 SREZIC [...] cpan.org - Correspondence added

On 2013-08-09 18:24:45, SCHWIGON wrote: Show quoted text

> Just uploaded v1.36 to CPAN which contains this "24 fix". > Please give it a try, whoever had problems with that before.

Net-SSH-Perl-1.36 still hangs with FreeBSD 8.0. I tried all file descriptors from 25 to 2, all behave the same. Regards, Slaven

Thu Aug 22 06:12:49 2013 schwigon [...] cpan.org - Correspondence added

On Sat Aug 10 01:48:33 2013, SREZIC wrote: Show quoted text

> On 2013-08-09 18:24:45, SCHWIGON wrote:

> > Just uploaded v1.36 to CPAN which contains this "24 fix". > > Please give it a try, whoever had problems with that before.

> > Net-SSH-Perl-1.36 still hangs with FreeBSD 8.0. > > I tried all file descriptors from 25 to 2, all behave the same.

Bummer! Anyway, thanks for testing that. Kind regards, Steffen -- Steffen Schwigon <ss5@renormalist.net> Dresden Perl Mongers <http://dresden-pm.org/>