This probably has something to do with the secure live logging. \ MacAir mozilla-inbound hg:[default!] $ ./mach taskcluster-build --head-repository http://hg.mozilla.org/try --head-rev eeda604378cb --owner armenzg@mozilla.com tasks/builds/b2g_emulator_jb_opt.yml | taskcluster run-task --verbose Task Created. Task ID: UWOtq0ePTwuCDz8GEqQ31A Task State: Pending events.js:85 throw er; // Unhandled 'error' event ^ Error: unable to verify the first certificate at Error (native) at TLSSocket.<anonymous> (_tls_wrap.js:929:36) at TLSSocket.emit (events.js:104:17) at TLSSocket._finishInit (_tls_wrap.js:460:8)

So it appears that this was caused by our live logger not including the intermediary certificate. Jonas put together a certificate we will use and it appears to work. Will update this bug next time a new AMI rolls out with this certificate change.

AMI was rolled out awhile ago, things should be working better now.