Getting a RiakError when setting links with RiakPbcTransport

riak_links_and_pb.py

from riak import RiakClient
from riak import RiakPbcTransport

c = RiakClient(port=8087, transport_class=RiakPbcTransport)
# c = RiakClient()
bucket = c.bucket('linktest')

# Group data

for n in xrange(0,10): # used to be 0,9
    group = bucket.new('group_%s' % n, {'id' : n})
    group.store()

# User data

for n in xrange(0,1000):
    key = 'user_%s' % n

    print 'Adding user %s' % n

    # Create the user
    data = {'name' : 'User %s' % n, 'id' : n}
    u = bucket.new(key, data)
    u = u.store()

    # Update the group list
    group_id = n % 10
    group_data = bucket.get('group_%s' % group_id)
    group_data.set_content_type('application/json') # This was required to make HTTP transport work
    group_data.add_link(u)
    group_data.store()
    # The line above throws riak.RiakError: 'Socket returned short packet length  - expected 4'
    # on user 9 but only when using RiakPbcTransport.

# Check the buckets
for n in xrange(0,10): # used to be 0,9
    print 'Group %s has %s users.' % (n, len(bucket.get('group_%s' % n).get_links()))

I fixed this by changing all xrange(0,9) calls to xrange(0,10), which is what I should have been doing in the first place.