https://app.google.stackdriver.com/account/login/luci-milo/incidents/0.k56bf8mrngxq

https://screenshot.googleplex.com/dtas9nGFrsH

16:29:16.027
Message ID "65350684880432" from subscription projects/luci-milo/subscriptions/buildbot-public is 5554647 bytes long
16:29:18.523
There are 10 builds
16:29:18.523
The master name is client.art
16:29:18.561
Fetching info for master client.art
16:29:22.071
Length of json data: 15723082
16:29:22.071
Length of gzipped data: 1364318
16:29:22.188
Could not save master in datastore Call error 5: API request too large: 1364444. Limit for datastore_v3 is: 1048576 :: {"error":"Call error 5: API request too large: 1364444. Limit for datastore_v3 is: 1048576"}