Dockerfile to build a Phabricator container that demonstrates git hanging when
cloning from Phabricator over SSH (see
https://discourse.phabricator-community.org/t/sporadic-git-cloning-hang-over-ssh/2233
for details).

The issue has been confirmed to exist in at least Phabricator stable releases
between 2016 Week 28 - 2019 Week 3.

A patch fixing the issue (which is due to select() sometimes returning with an
EINTR error) is available on
https://discourse.phabricator-community.org/t/sporadic-git-cloning-hang-over-ssh/2233/19?u=sitsofe
.

Container build and usage steps
-------------------------------

docker run --name mysql-phabricator -e MYSQL_ROOT_PASSWORD=githang \
    -d mysql:5 \
    mysqld --ft-min-word-len=3 --innodb-buffer-pool-size=256M \
	--local-infile=0 --max_allowed_packet=32M \
	--max-connections=1000 --sql-mode="STRICT_ALL_TABLES" 
docker build -t sitsofe/phabricator-clone-hang:latest \
    https://github.com/sitsofe/phabricator-clone-hang.git
docker run --privileged --init -it -e SERVER_FQDN=$(hostname -f) -p 80:80 \
    --link mysql-phabricator --name phabricator-clone-hang \
    sitsofe/phabricator-clone-hang /bin/bash

Follow the prompts. Eventually repeated git cloning will take place in a
loop - allow this to continue until the hang occurs. Once it does, you can use
docker exec -it phabricator-clone-hang /bin/bash
from another TTY to enter the container and look around.