ews isn't retrying builds when kill old process fails. e.g.: https://ews-build.webkit.org/#/builders/56/builds/196 didn't resulted in retry. Retry on kill-old-process failure was added in https://trac.webkit.org/changeset/252324/webkit which was working fine. But seems like https://trac.webkit.org/r257654 broke it.
Created attachment 418944 [details] Patch
Sample run: https://ews-build.webkit-uat.org/#/builders/13/builds/3883
Committed r272204: <https://trac.webkit.org/changeset/272204> All reviewed patches have been landed. Closing bug and clearing flags on attachment 418944 [details].
<rdar://problem/73872929>
This seems to work fine. For e.g: https://ews-build.webkit.org/#/builders/58/builds/2278 was retried when kill-old-processes failed (as bot was in bad state).