
We think Apache may be caching 503 responses (possibly themselves a result of [1]). Set retry=0 so that we do not cache any failures and switch to proxypass so that we can set that option. [1] https://bz.apache.org/bugzilla/show_bug.cgi?id=37770 Change-Id: Ibd1087bc8feb288bfb8f66f4e6de61ebe8414233