Issue Summary

$BITBUCKET_HOME/bin/git-hooks/hook-callback.pl script opens a socket connection for hook callbacks, currently, even if the bitbucket is running on IPv6 environment this script tries to open the socket on IPv4.

Steps to Reproduce

Run Bitbucket on an IPv6 environment and try to clone you will see the $BITBUCKET_HOME/bin/git-hooks/hook-callback.pl listening on the IPv4 address.

Expected Results

$BITBUCKET_HOME/bin/git-hooks/hook-callback.pl should start listening on IPv6 address

Actual Results

$BITBUCKET_HOME/bin/git-hooks/hook-callback.pl still uses Ipv4

atlbitb+  9750  9749  1 11:23 ?        00:00:07 perl /var/atlassian/application-data/bitbucket/bin/git-hooks/hook-callback.pl git-pack-objects git pack-objects --revs --thin --stdout --progress --delta-base-offset

lsof -p 9750
COMMAND  PID         USER   FD   TYPE DEVICE SIZE/OFF    NODE NAME
perl    9750 atlbitbucket  cwd    DIR   0,38     4096 1048653 /var/atlassian/application-data/bitbucket/shared/data/repositories/22 (10.9.30.120:/mnt/home)
perl    9750 atlbitbucket  rtd    DIR  202,1     4096      96 /
perl    9750 atlbitbucket  txt    REG  202,1    11312 4235117 /usr/bin/perl
perl    9750 atlbitbucket    3u  IPv4 104222      0t0     TCP localhost:45206->localhost:41219 (ESTABLISHED)

Workaround

Modify the $BITBUCKET_HOME/bin/git-hooks/hook-callback.pl to use IPv6

Change the below line on $BITBUCKET_HOME/bin/git-hooks/hook-callback.pl

my $socket = new IO::Socket::INET

It should be replaced to:

my $socket = new IO::Socket::INET6

(also added use IO::Socket::INET6; at top of hook-callback.pl)

Please Note this isn't a permanent setting everytime the Bitbucket service is restarted the hook-callback.pl is regenerated by the Bitbucket so it must be modified every time after the restart.