#6535 executing multiple pexes with the same file on their PEX_PATH concurrently can result in OSError Issue created by cosmicexplorer currently working on an upstream repro The internal repro of this looks like:

./pants binary path/to:pex-1
./pants binary path/to:pex-2

chmod +x ./dist/pex-2.pex
export PEX_PATH=`pwd`/dist/pex-1.pex
echo $PEX_PATH

./dist/pex-2.pex &
./dist/pex-2.pex &
./dist/pex-2.pex &
./dist/pex-2.pex &
./dist/pex-2.pex &
./dist/pex-2.pex &
./dist/pex-2.pex &
./dist/pex-2.pex &

Which results in:

File ".bootstrap/_pex/pex.py", line 364, in execute
File ".bootstrap/_pex/pex.py", line 90, in _activate
File ".bootstrap/_pex/environment.py", line 147, in activate
File ".bootstrap/_pex/environment.py", line 198, in _activate
File ".bootstrap/_pex/environment.py", line 52, in force_local
OSError: [Errno 39] Directory not empty
Traceback (most recent call last):
File ".bootstrap/_pex/pex.py", line 364, in execute
File ".bootstrap/_pex/pex.py", line 90, in _activate
File ".bootstrap/_pex/environment.py", line 147, in activate
File ".bootstrap/_pex/environment.py", line 198, in _activate
File ".bootstrap/_pex/environment.py", line 52, in force_local
OSError: [Errno 39] Directory not empty
Traceback (most recent call last):
File ".bootstrap/_pex/pex.py", line 364, in execute
File ".bootstrap/_pex/pex.py", line 90, in _activate
File ".bootstrap/_pex/environment.py", line 147, in activate
File ".bootstrap/_pex/environment.py", line 198, in _activate
File ".bootstrap/_pex/environment.py", line 52, in force_local
OSError: [Errno 39] Directory not empty
Traceback (most recent call last):
File ".bootstrap/_pex/pex.py", line 364, in execute
File ".bootstrap/_pex/pex.py", line 90, in _activate
File ".bootstrap/_pex/environment.py", line 147, in activate
File ".bootstrap/_pex/environment.py", line 198, in _activate
File ".bootstrap/_pex/environment.py", line 52, in force_local
OSError: [Errno 39] Directory not empty
Traceback (most recent call last):
File ".bootstrap/_pex/pex.py", line 364, in execute
File ".bootstrap/_pex/pex.py", line 90, in _activate
File ".bootstrap/_pex/environment.py", line 147, in activate
File ".bootstrap/_pex/environment.py", line 198, in _activate
File ".bootstrap/_pex/environment.py", line 52, in force_local
OSError: [Errno 39] Directory not empty
Traceback (most recent call last):
File ".bootstrap/_pex/pex.py", line 364, in execute
File ".bootstrap/_pex/pex.py", line 90, in _activate
File ".bootstrap/_pex/environment.py", line 147, in activate
File ".bootstrap/_pex/environment.py", line 198, in _activate
File ".bootstrap/_pex/environment.py", line 52, in force_local
OSError: [Errno 39] Directory not empty
Traceback (most recent call last):
File ".bootstrap/_pex/pex.py", line 364, in execute
File ".bootstrap/_pex/pex.py", line 90, in _activate
File ".bootstrap/_pex/environment.py", line 147, in activate
File ".bootstrap/_pex/environment.py", line 198, in _activate
File ".bootstrap/_pex/environment.py", line 52, in force_local
OSError: [Errno 39] Directory not empty
<one line of output, which means at least one binary ran to completion>

Setting

PANTS_ENABLE_PANTSD=False

stopped this. I suspect this is something that is being done wrong in pants that propagates to the pex files here -- looking up how

PEX_PATH

is consumed is likely to be enlightening. pantsbuild/pants