Comment 83 for bug 1711407

> The symptoms seen are a number of docker commands that just hang indefinitely (e.g.
> docker ps, spinning up new containers). Occasionally, after a long time, we have
> seen it come back and continue working OK (like whatever was holding the lock
> released it finally), but most of the time it hangs indefinitely

ok, great. You didn't mention what release you're using on gcp, but I have a 4.13 test kernel in this ppa, with patches to specifically fix/workaround the hanging problem:
https://launchpad.net/~ddstreet/+archive/ubuntu/lp1711407

Note that *only* version 4.13.0-38.43+hf1711407v20180413b1 in that ppa has the patches to workaround the hanging. If you need a different version, let me know and I can apply the patches and build for whatever release you need (just give me the 'uname -a' output).

The details of the cause of this problem is back in comment 72, if you want that info. I'm preparing to send the workaround patch upstream; after that, there will be (likely ongoing) work to debug the various dst/object leaks and kernel socket "leaks" that are actually causing the symptoms.