[Scons-users] Random build failure with 'Resource temporarily unavailable' on mac

[Bill Deegan]

Can you provide a small reproducer?

On Wed, Jun 10, 2020 at 3:58 AM Julien Pommier <pommier at pianoteq.com> wrote:

> Hi,
>
> I have an issue that has been randomly annoying me for a few years, when
> building a largish application on macs. From time to time, the build will
> fail with this error:
>
>  *** [build/darwin/foo.o] Resource temporarily unavailable
>
> It does not always happen at the same place in the build, it is really
> random and hard to reproduce. I have finally traced which instruction is
> failing in scons, and it turns out it is:
>
>                 sys.stdout.write(s + u"\n”) , in print_cmd_line in
> Action.py
>
> which sometime throws an IOError (errno=35) exception.
>
> I feel that this happens only when building with more than one job, so
> maybe this is related to a threading issue or bug in python ? This happens
> when running scons with the system installed python 2.7 (which I usually
> do), but also with python3 — in that case, the error reported with python 3
> is
>
> scons:  *** [build/darwin/foo.o] write could not complete without blocking
>
> The exception stack trace is:
>
>   File
> "/usr/local/Cellar/scons/3.1.1/libexec/scons-local/SCons/Taskmaster.py",
> line 255, in execute
>     self.targets[0].build()
>   File
> "/usr/local/Cellar/scons/3.1.1/libexec/scons-local/SCons/Node/__init__.py",
> line 765, in build
>     self.get_executor()(self, **kw)
>   File
> "/usr/local/Cellar/scons/3.1.1/libexec/scons-local/SCons/Executor.py", line
> 397, in __call__
>     return _do_execute_map[self._do_execute](self, target, kw)
>   File
> "/usr/local/Cellar/scons/3.1.1/libexec/scons-local/SCons/Executor.py", line
> 128, in execute_action_list
>     status = act(*args, **kw)
>   File
> "/usr/local/Cellar/scons/3.1.1/libexec/scons-local/SCons/Action.py", line
> 1056, in __call__
>     show, execute, chdir, executor)
>   File
> "/usr/local/Cellar/scons/3.1.1/libexec/scons-local/SCons/Action.py", line
> 1123, in __call__
>     return c.__call__(self, target, source, env, *args, **kw)
>   File
> "/usr/local/Cellar/scons/3.1.1/libexec/scons-local/SCons/Action.py", line
> 705, in __call__
>     print_func(cmd, target, source, env)
>   File
> "/usr/local/Cellar/scons/3.1.1/libexec/scons-local/SCons/Action.py", line
> 639, in print_cmd_line
>     sys.stdout.write(s + u"\n")
> scons: *** [build/darwin/foo.o] write could not complete without blocking
>
> I have figured a “fix” which is to just ignore IOError exceptions in the
> print_cmd_line function, but of course this is not very satisfactory.
>
>
>
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