# Unable to fork off sideband demultiplexer 15 messages from 2011-06-01 to 2011-06-04. Participants: Randy Brandenburg, Junio C Hamano, Jeff King, Ben Walton, Brandon Casey. Thread: https://gitlist.dev/t/27523 ## Randy Brandenburg, 2011-06-01 14:16 Subject: Unable to fork off sideband demultiplexer Message-ID: URL: https://gitlist.dev/e/loom.20110601T161508-689%40post.gmane.org ``` I have searched high and low to find a resolution to this error I am seeing when attempting to push or pull from a repository (either remote or on the same machine). The error reported is as follows: # git push error: cannot create thread: Unknown error fatal: fetch-pack: Unable to fork off sideband demultiplexer Broken pipe # git pull error: cannot create thread: Unknown error fatal: receive-pack: Unable to fork off sideband demultiplexer Broken pipe This is a Solaris 9 installation (git-1.7.5-sol9-sparc-local.gz obtained from Sunfreeware.com) including all of the required package dependencies listed. I followed the same install on a Solaris 10 box and have no issues. Not sure if this is a permissions issue or something not configured correctly. Any help is greatly appreciated. ``` ## Junio C Hamano, 2011-06-01 17:15 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: <7vk4d5h3qt.fsf@alter.siamese.dyndns.org> URL: https://gitlist.dev/e/7vk4d5h3qt.fsf%40alter.siamese.dyndns.org In-Reply-To: ``` Randy Brandenburg writes: > # git push > error: cannot create thread: Unknown error Perhaps threading library does not really work on your platform? Does rebuilding git with "make NO_PTHREADS=YesPlease" help? ``` ## Jeff King, 2011-06-01 17:35 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: <20110601173524.GF7132@sigill.intra.peff.net> URL: https://gitlist.dev/e/20110601173524.GF7132%40sigill.intra.peff.net In-Reply-To: <7vk4d5h3qt.fsf@alter.siamese.dyndns.org> ``` On Wed, Jun 01, 2011 at 10:15:54AM -0700, Junio C Hamano wrote: > Randy Brandenburg writes: > > > # git push > > error: cannot create thread: Unknown error > > Perhaps threading library does not really work on your platform? Does > rebuilding git with "make NO_PTHREADS=YesPlease" help? I suspect it is more subtle than that. We've had several people recently reporting the same issue, and all are using pre-built binaries on Solaris 9. Given the weird errno value ("unknown error"), my guess is that the packages are built on Solaris 10, and there is some ABI incompatibility between the two platforms. I'd be curious if building on Solaris 9, even without NO_PTHREADS set, fixes the issue. -Peff ``` ## Randy Brandenburg, 2011-06-01 19:10 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: URL: https://gitlist.dev/e/loom.20110601T210757-955%40post.gmane.org In-Reply-To: <20110601173524.GF7132@sigill.intra.peff.net> ``` Jeff King peff.net> writes: > > I suspect it is more subtle than that. We've had several people recently > reporting the same issue, and all are using pre-built binaries on > Solaris 9. Given the weird errno value ("unknown error"), my guess is > that the packages are built on Solaris 10, and there is some ABI > incompatibility between the two platforms. > > I'd be curious if building on Solaris 9, even without NO_PTHREADS set, > fixes the issue. > > -Peff > Thank you for the insight. I will attempt to rebuild on the target platform and see what happens. I will post the results when I have an answer on whther that helped or not. ``` ## Randy Brandenburg, 2011-06-02 15:29 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: URL: https://gitlist.dev/e/loom.20110602T172442-653%40post.gmane.org In-Reply-To: ``` Randy Brandenburg woh.rr.com> writes: > > Jeff King peff.net> writes: > > > > I suspect it is more subtle than that. We've had several people recently > > reporting the same issue, and all are using pre-built binaries on > > Solaris 9. Given the weird errno value ("unknown error"), my guess is > > that the packages are built on Solaris 10, and there is some ABI > > incompatibility between the two platforms. > > > > I'd be curious if building on Solaris 9, even without NO_PTHREADS set, > > fixes the issue. > > > > -Peff > > > > Thank you for the insight. I will attempt to rebuild on the target platform and > see what happens. > > I will post the results when I have an answer on whther that helped or not. > > I rebuilt git-1.7.5 from source on the Solaris 9 platform with gcc-3.4.6, GNU make 3.82, and GNU install (from coreutils 8.11). Following these steps ---------------------------------------------------------------------------- # ./configure CC=gcc Edit the Makefile - set the path to "ar", "gcc" and GNU "install". CC = /usr/local/bin/gcc AR = /usr/ccs/bin/ar INSTALL = /usr/local/bin/install Look for ifeq ($(uname_S),SunOS) and set INSTALL to /usr/lcoal/bin/install # gmake NO_TCLTK=1 NO_CURL=1 NO_PTHREADS=YesPlease install prefix=/opt/sfw # git --version git version 1.7.5 ---------------------------------------------------------------------------- Preliminary testing indicates a working system -- will investigate thourough today and tomorrow. Thanks for the tips! - Randy ``` ## Jeff King, 2011-06-02 19:29 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: <20110602192927.GA21262@sigill.intra.peff.net> URL: https://gitlist.dev/e/20110602192927.GA21262%40sigill.intra.peff.net In-Reply-To: ``` On Thu, Jun 02, 2011 at 03:29:04PM +0000, Randy Brandenburg wrote: > I rebuilt git-1.7.5 from source on the Solaris 9 platform with gcc-3.4.6, GNU > make 3.82, and GNU install (from coreutils 8.11). Following these steps > > ---------------------------------------------------------------------------- > # ./configure CC=gcc Hmm, I would have thought configure would set up most of what you needed below, but it's possible our autoconf is not very complete (unlike many projects, it's not necessary to use it to build). > Edit the Makefile - set the path to "ar", "gcc" and GNU "install". > CC = /usr/local/bin/gcc > AR = /usr/ccs/bin/ar > INSTALL = /usr/local/bin/install > Look for ifeq ($(uname_S),SunOS) and set INSTALL to /usr/lcoal/bin/install Rather than edit the Makefile, you can put these in "config.mak" which is sourced automatically by the Makefile (after the defaults are set up, so you can override them). > # gmake NO_TCLTK=1 NO_CURL=1 NO_PTHREADS=YesPlease install prefix=/opt/sfw > # git --version > git version 1.7.5 > ---------------------------------------------------------------------------- > Preliminary testing indicates a working system -- will investigate thourough > today and tomorrow. Great, I'm glad it's working. With NO_PTHREADS set, you will be fork()ing off the sideband process instead of using a thread. So you avoid pthreads altogether and it works, but you can't do multi-threaded delta compression. If you build without NO_PTHREADS set on a Solaris 9 box, does it work on that same box? That would confirm or deny my ABI compatibility theory (and hopefully point us in the right direction for the sunfreeware people to build a binary that works on Solaris 9 and 10). -Peff ``` ## Ben Walton, 2011-06-02 19:36 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: <1307043315-sup-5292@pinkfloyd.chass.utoronto.ca> URL: https://gitlist.dev/e/1307043315-sup-5292%40pinkfloyd.chass.utoronto.ca In-Reply-To: ``` Excerpts from Randy Brandenburg's message of Wed Jun 01 10:16:32 -0400 2011: Hi Randy, > This is a Solaris 9 installation (git-1.7.5-sol9-sparc-local.gz > obtained from Sunfreeware.com) including all of the required package > dependencies listed. I followed the same install on a Solaris 10 > box and have no issues. Not sure if this is a permissions issue or > something not configured correctly. Have you considered the OpenCSW git[1] packages? I'm a little stale at 1.7.3 right now but I have 1.7.5 ready to go... It's built with thread support and should work on both 9 and 10. Thanks -Ben [1] http://opencsw.org/packages/git -- Ben Walton Systems Programmer - CHASS University of Toronto C:416.407.5610 | W:416.978.4302 ``` ## Randy Brandenburg, 2011-06-03 12:29 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: URL: https://gitlist.dev/e/loom.20110603T142235-877%40post.gmane.org In-Reply-To: <1307043315-sup-5292@pinkfloyd.chass.utoronto.ca> ``` Ben Walton artsci.utoronto.ca> writes: Hey Ben, > > Have you considered the OpenCSW git[1] packages? I'm a little stale > at 1.7.3 right now but I have 1.7.5 ready to go... > I did download the 1.7.3.2 version using pkg-get as the next option if I couldnt get the 1.7.5 to build and install. I would be all for a working package install if available, since we will have to install Git on a developer machine each time one is upgraded from a standard install of Solaris 9. I would like to add a package to our install instead of actually building from source each time. Please keep me posted when the package is available for download! Thanks, Randy Brandenburg ``` ## Randy Brandenburg, 2011-06-03 12:32 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: URL: https://gitlist.dev/e/loom.20110603T142958-87%40post.gmane.org In-Reply-To: <20110602192927.GA21262@sigill.intra.peff.net> ``` Jeff King peff.net> writes: > > If you build without NO_PTHREADS set on a Solaris 9 box, does it work on > that same box? That would confirm or deny my ABI compatibility theory > (and hopefully point us in the right direction for the sunfreeware > people to build a binary that works on Solaris 9 and 10). > > -Peff > I will attempt building without NO_PTHREADS set today along with the other suggestions about modifying the config.mak instead of the actual Makefile. Stay tuned. - Randy ``` ## Randy Brandenburg, 2011-06-03 13:30 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: URL: https://gitlist.dev/e/loom.20110603T151012-143%40post.gmane.org In-Reply-To: <20110602192927.GA21262@sigill.intra.peff.net> ``` Jeff King peff.net> writes: > Great, I'm glad it's working. With NO_PTHREADS set, you will be > fork()ing off the sideband process instead of using a thread. So you > avoid pthreads altogether and it works, but you can't do multi-threaded > delta compression. > > If you build without NO_PTHREADS set on a Solaris 9 box, does it work on > that same box? That would confirm or deny my ABI compatibility theory > (and hopefully point us in the right direction for the sunfreeware > people to build a binary that works on Solaris 9 and 10). > Building without NO_PTHREADS set results in the original "broken" behaviour. I am staying with the working version in the interest of time. May investigate more later. Thanks for all the insight and tips. - Randy ``` ## Jeff King, 2011-06-03 14:49 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: <20110603144907.GA11273@sigill.intra.peff.net> URL: https://gitlist.dev/e/20110603144907.GA11273%40sigill.intra.peff.net In-Reply-To: ``` On Fri, Jun 03, 2011 at 01:30:00PM +0000, Randy Brandenburg wrote: > > If you build without NO_PTHREADS set on a Solaris 9 box, does it > > work on that same box? That would confirm or deny my ABI > > compatibility theory (and hopefully point us in the right direction > > for the sunfreeware people to build a binary that works on Solaris 9 > > and 10). > > > > Building without NO_PTHREADS set results in the original "broken" > behaviour. I am staying with the working version in the interest of > time. May investigate more later. Thanks, that's a good data point. I know you are probably out of time for fooling with such things, but if you get a chance, could you try building also with "-pthreads" in PTHREAD_CFLAGS? I'm wondering if the problem is as simple as that. -Peff ``` ## Randy Brandenburg, 2011-06-03 18:52 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: URL: https://gitlist.dev/e/loom.20110603T204919-581%40post.gmane.org In-Reply-To: <20110603144907.GA11273@sigill.intra.peff.net> ``` Jeff King peff.net> writes: > > Thanks, that's a good data point. I know you are probably out of time > for fooling with such things, but if you get a chance, could you try > building also with "-pthreads" in PTHREAD_CFLAGS? I'm wondering if the > problem is as simple as that. > > -Peff > OK, rebuilt with NO_PTHREADS=0 and PTHREAD_CFLAGS=-pthreads and it seems to be working. Just tested quickly for the basics (push and pull). I will be able to test more in depth next week, but I would assume that all will be okay. Hope this helps. -Randy ``` ## Jeff King, 2011-06-03 19:24 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: <20110603192445.GA26977@sigill.intra.peff.net> URL: https://gitlist.dev/e/20110603192445.GA26977%40sigill.intra.peff.net In-Reply-To: ``` On Fri, Jun 03, 2011 at 06:52:32PM +0000, Randy Brandenburg wrote: > OK, rebuilt with NO_PTHREADS=0 and PTHREAD_CFLAGS=-pthreads and it seems to be > working. Just tested quickly for the basics (push and pull). I will be able to > test more in depth next week, but I would assume that all will be > okay. I think that will still build without pthreads at all, as we check "ifdef NO_PTHREADS" in the Makefile. You have to use "NO_PTHREADS=". -Peff ``` ## Brandon Casey, 2011-06-03 22:18 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: URL: https://gitlist.dev/e/hHoAK3_nb0Xfx67o9GUPrCAUvVBvhjmiF5J8x5abCUQeaCChUD3Q3Q%40cipher.nrlssc.navy.mil In-Reply-To: <20110603144907.GA11273@sigill.intra.peff.net> ``` On 06/03/2011 09:49 AM, Jeff King wrote: > On Fri, Jun 03, 2011 at 01:30:00PM +0000, Randy Brandenburg wrote: > >>> If you build without NO_PTHREADS set on a Solaris 9 box, does it >>> work on that same box? That would confirm or deny my ABI >>> compatibility theory (and hopefully point us in the right direction >>> for the sunfreeware people to build a binary that works on Solaris 9 >>> and 10). >>> >> >> Building without NO_PTHREADS set results in the original "broken" >> behaviour. I am staying with the working version in the interest of >> time. May investigate more later. > > Thanks, that's a good data point. I know you are probably out of time > for fooling with such things, but if you get a chance, could you try > building also with "-pthreads" in PTHREAD_CFLAGS? I'm wondering if the > problem is as simple as that. I generally build on 5.7 using Sun WSPro compilers and then test that binary on 5.7 and 5.9. The latest that I have compiled is 1.7.5.3 and I haven't seen this thread error. Also note, I only do the above for testing purposes (and fun :). Solaris is not a primary development platform, so it does not get a lot of active testing in practice. The 5.9 system doesn't even have a compiler installed, so I can't try to duplicate this problem. -Brandon ``` ## Ben Walton, 2011-06-04 19:32 Subject: Re: Unable to fork off sideband demultiplexer Message-ID: <1307215847-sup-5834@pinkfloyd.chass.utoronto.ca> URL: https://gitlist.dev/e/1307215847-sup-5834%40pinkfloyd.chass.utoronto.ca In-Reply-To: ``` Excerpts from Randy Brandenburg's message of Fri Jun 03 08:29:21 -0400 2011: Hi Randy, > I did download the 1.7.3.2 version using pkg-get as the next option Try pkgutil. It's much more capable. :) > Please keep me posted when the package is available for download! I'll push these for release shortly, but in the meantime, you can get 1.7.5.4 packages here: http://buildfarm.opencsw.org/experimental.html#git Thanks -Ben -- Ben Walton Systems Programmer - CHASS University of Toronto C:416.407.5610 | W:416.978.4302 ```