Iptables FORWARD chain error on latest beta

ERROR: for rabbitmq driver failed programming external connectivity on endpoint rabbitmq (d192614cf8b85e5b2f89513f4d7b377ca1b8a2a73242f531936c4add18afa28a): Error iptables FORWARD: Another app is currently holding the xtables lock; waiting (1s) for it to exit…
ERROR: Encountered errors while bringing up the project.

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I’ve been seeing the same.

diagnostic id: 4EE47C98-FBE2-4F7C-A70C-B8BF5AABEE64

It’s intermittent. I’m guessing there’s some race condition going on where the engine doesn’t wait long enough for the lock to release. The docker-compose up command will hang for ~2-3 secs, then die with this error. I see it when I’m up’ing a docker compose file that has an ngnix service that has ~10 links.

also seeing this regularly on 1.12.0-rc4-beta19 (about 2-3 times today so far). Workaround is to restart the docker daemon.

Also seeing it regularly using docker-compose on 1.12.0-rc4-beta20 (build: 10404).