Stage failed due to detectable lack of resources but was not restarted

[jimklimov]

clang: error: unable to execute command: posix_spawn failed: Resource temporarily unavailable in one slow-build cell log of https://ci.networkupstools.org/job/nut/job/nut/job/PR-2903/1/ : https://ci.networkupstools.org/job/nut/job/nut/job/PR-2903/1/artifact/.ci.MD5_89a8a390b8173d0cdbae275673fb4017.check.log.gz but apparently was not found by ~/.*(spawn|fork|exec).*Resource temporarily unavailable.*/ java matchers - neither in JSL nor BFA. Worked in shell grep :\