Un-clear if this traceback is the actual problem but it is the best information available.
[Mon Aug 14 16:03:28.694429 2017] [:error] [pid 22681] INFO:root:Staging artifacts on devserver http://192.168.231.1:8080: build=terra-release/R60-9592.72.0, artifacts=['test_suites'], files=, archive_url=gs://chromeos-moblab-peng-staging/terra-release/R60-9592.72.0
[Mon Aug 14 16:03:29.180044 2017] [:error] [pid 22681] DEBUG:root:response for RPC: 'Success'
[Mon Aug 14 16:03:29.263115 2017] [:error] [pid 22681] DEBUG:root:whether artifact is staged: 'True'
[Mon Aug 14 16:03:29.263516 2017] [:error] [pid 22681] INFO:root:Finished staging artifacts: build=terra-release/R60-9592.72.0, artifacts=['test_suites'], files=, archive_url=gs://chromeos-moblab-peng-staging/terra-release/R60-9592.72.0
[Mon Aug 14 16:03:30.584380 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:30.632786 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:30.648819 2017] [:error] [pid 22681] INFO:root:Failed to parse control file: client/deps/telemetry_dep/test_src/third_party/catapult/third_party/gsutil/third_party/python-gflags/debian/control
[Mon Aug 14 16:03:31.471629 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:32.222657 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:32.567570 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:33.299451 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:33.669760 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:33.955126 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:34.129697 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:34.203890 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:34.710493 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:34.925476 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:35.151111 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:35.932237 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:36.041688 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:37.101984 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'doc, test_type, author, name, time.']
[Mon Aug 14 16:03:38.488723 2017] [:error] [pid 22681] ['WARNING: Not all required control variables were specified in . Please define', 'test_type, author, name, time.']
[Mon Aug 14 16:03:38.774731 2017] [core:error] [pid 22558] [client 10.107.184.11:35488] End of script output before headers: frontend.wsgi, referer: http://172.22.19.56/afe/
[Mon Aug 14 16:04:46.281086 2017] [core:notice] [pid 3960] AH00051: child pid 25581 exit signal Segmentation fault (11), possible coredump in /usr/lib64/apache2
Comment 1 by bugdroid1@chromium.org
, Aug 24 2017