gistfile1.txt

tester+ 300828  0.6  3.7 1052368 144456 pts/15 Sl+  22:22   0:02  |                       \_ node ./node_modules/karma/bin/karma start karma.ci.conf.js
tester+ 300835  0.2  1.7 599252 67112 pts/15   Sl+  22:22   0:01  |                           \_ /opt/google/chrome/chrome --user-data-dir=/tmp/karma-49892036 --no-default-browser-check --no-first-run --disable-default-apps --disable-popup-blocking --disable-translate http://localhost:2000/?id=49892036
tester+ 300843  0.0  0.0   6460   388 pts/15   S+   22:22   0:00  |                               \_ /opt/google/chrome/chrome-sandbox /opt/google/chrome/chrome --type=zygote --user-data-dir=/tmp/karma-49892036
tester+ 300844  0.0  0.7 375808 29600 pts/15   S+   22:22   0:00  |                               |   \_ /opt/google/chrome/chrome --type=zygote --user-data-dir=/tmp/karma-49892036
tester+ 300851  0.0  0.2 375808  8548 pts/15   S+   22:22   0:00  |                               |       \_ /opt/google/chrome/chrome --type=zygote --user-data-dir=/tmp/karma-49892036
tester+ 300904  0.1  0.5 605256 21208 pts/15   S+   22:22   0:00  |                               \_ /opt/google/chrome/chrome --user-data-dir=/tmp/karma-49892036 --no-default-browser-check --no-first-run --disable-default-apps --disable-popup-blocking --disable-translate http://localhost:2000/?id=49892036

kill 300835 had no response
kill 300843, 300844, 300851 did NOT solve the problem.
kill 300904 worked