[Scons-users] scons-local-2.5.1 build and clean shows random failure

[Bill Deegan]

If you build with no "-j8" do you see the error?
If not then what's the output of --tree=prune without -j8?

Also you didn't respond to:

Do you have any custom Builders?

-Bill

On Fri, Jul 21, 2017 at 6:28 PM, Hua Yanghao <huayanghao at gmail.com> wrote:

> hua at grass:~ $ python --version
> Python 2.7.13
> hua at grass:~ $ lsb_release -a
> LSB Version: core-9.20160110ubuntu5-amd64:core-9.20160110ubuntu5-noarch:
> security-9.20160110ubuntu5-amd64:security-9.20160110ubuntu5-noarch
> Distributor ID: Ubuntu
> Description: Ubuntu 17.04
> Release: 17.04
> Codename: zesty
> hua at grass:~ $
>
> I attached the taskmastertrace log here.
>
> --tree=prune shows the same result:
> hua at grass:~/git/usw $ tools/scons -j8 --tree=prune -c
> --taskmastertrace=test.log config=linux64_full.py
> scons: Reading SConscript files ...
> scons: done reading SConscript files.
> scons: Cleaning targets ...
> scons: done cleaning targets.
>
> scons: *** Found dependency cycle(s):
>   Internal Error: no cycle found for node output/linux64_full
> (<SCons.Node.FS.Dir object at 0x55d1fef0ffe0>) in state pending
>
> File "/home/hua/git/usw/tools/scons-local-2.5.1/SCons/Taskmaster.py",
> line 1043, in cleanup
>
> On Sat, Jul 22, 2017 at 12:03 AM, Bill Deegan <bill at baddogconsulting.com>
> wrote:
> > Which version of Python?
> > What operating system? (mac, linux, windows?)
> >
> > Do you have any custom Builders?
> >
> > Try using
> > --taskmastertrace=file
> >
> > Prints trace information to the specified file about how the internal
> > Taskmaster object evaluates and controls the order in which Nodes are
> built.
> > A file name of - may be used to specify the standard output.
> >
> > And pastebin the output.
> >
> > Also anything unusual in --tree=prune ?
> >
> > -Bill
> >
> >
> > On Fri, Jul 21, 2017 at 5:17 PM, Hua Yanghao <huayanghao at gmail.com>
> wrote:
> >>
> >> Dear Scons User,
> >> I am recently experiencing some random failures in both scons build
> >> and scons clean (-c).
> >>
> >> Unfortunately the project has more than 2000 .c/.h files and I cannot
> >> create a minimal project to reproduce this issue.
> >>
> >> Error message: (scons -c)
> >> Removed output/linux64_full/libusw.a
> >> Removed output/linux64_full/cmdlist.txt
> >> scons: done cleaning targets.
> >>
> >> scons: *** Found dependency cycle(s):
> >>   Internal Error: no cycle found for node output/linux64_full
> >> (<SCons.Node.FS.Dir object at 0x5630bcf78c60>) in state pending
> >>
> >> File "/home/hua/git/usw/tools/scons-local-2.5.1/SCons/Taskmaster.py",
> >> line 1043, in cleanup
> >>
> >> End of error message.
> >>
> >> This issue can be reproduced one out of five runs, could happen in
> >> both scons build and scons clean.
> >> This issue happens *only* with parallel builds (-j8), and cannot
> >> reproduce with single thread build.
> >> The project uses scons VariantDir() and many custom builders.
> >>
> >> In file SCons/Taskmaster.py, if I simply add a "return" on line 1033,
> >> the problem cannot be reproduced anymore, and builds are fine all the
> >> time (checked many dozens of times):
> >> 1033         return # <--------- This line "fixed" the issue ;-)
> >> 1034         desc = 'Found dependency cycle(s):\n'
> >> 1035         for node, cycle in nclist:
> >> 1036             if cycle:
> >> 1037                 desc = desc + "  " + " -> ".join(map(str, cycle)) +
> >> "\n"
> >> 1038             else:
> >> 1039                 desc = desc + \
> >> 1040                     "  Internal Error: no cycle found for node %s
> >> (%s) in state %s\n" %  \
> >> 1041                     (node, repr(node),
> StateString[node.get_state()])
> >> 1042
> >> 1043         raise SCons.Errors.UserError(desc)
> >>
> >> Does anyone had similar experience? Is scons over-checking something
> >> and made a false alarm?
> >> I am about to promote scons to a much wider audience but this issue
> >> really makes me a little bit nervous.
> >>
> >> Thanks a lot for your help,
> >> Yanghao
> >> _______________________________________________
> >> Scons-users mailing list
> >> Scons-users at scons.org
> >> https://pairlist4.pair.net/mailman/listinfo/scons-users
> >
> >
> >
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>
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