While master 0032 isn't overloaded, it delegates
https://pantheon.corp.google.com/storage/browser/chromeos-autotest-results/195422905-chromeos-test/hostless/debug

the provision to 0018 
04/27 05:35:33.880 DEBUG|             suite:1166| Scheduling provision_AutoUpdate.double
04/27 05:35:34.440 DEBUG|             suite:1450| Adding job keyval for provision_AutoUpdate.double=195422974-chromeos-test
[...]
04/27 06:38:53.232 INFO |        server_job:0218| START	----	coral-paladin/R68-10623.0.0-rc3/bvt-inline/provision_AutoUpdate.double	timestamp=1524836333	localtime=Apr 27 06:38:53	
04/27 06:38:53.232 INFO |        server_job:0218| 	ABORT	----	coral-paladin/R68-10623.0.0-rc3/bvt-inline/provision_AutoUpdate.double	timestamp=1524836333	localtime=Apr 27 06:38:53	
04/27 06:38:53.233 INFO |        server_job:0218| END ABORT	----	coral-paladin/R68-10623.0.0-rc3/bvt-inline/provision_AutoUpdate.double	timestamp=1524836333	localtime=Apr 27 06:38:53	

where indeed all coral work is done, and that is overloaded, hence issue 837388 and issue 837714.

https://pantheon.corp.google.com/storage/browser/chromeos-autotest-results/195422974-chromeos-test

04/27 05:53:59.515 INFO |          autoserv:0749| Results placed in /usr/local/autotest/results/195422974-chromeos-test/chromeos2-row4-rack4-host17
04/27 05:53:59.516 DEBUG|          autoserv:0757| autoserv is running in drone cros-full-0018.mtv.corp.google.com.

It sounds like a duplicate?

crbug.com/837714 is using to track overload issue on shard 0001/0010/0018.