aae replication

After taking nodes up and down:
source:
2016-01-18 10:01:36.166 [error] <0.2774.0> Supervisor riak_repl2_fssource_sup had child 685078892498860742907977265335757665463718379520 started with {riak_repl2_fssource,start_link,undefined} at <0.512.13> exit with reason no such process or port in call to gen_server:call(undefined, {get_lock,fullsync_source,<0.499.13>}, infinity) in context child_terminated
2016-01-18 10:01:36.178 [error] <0.523.13> gen_fsm <0.523.13> in state prepare_exchange terminated with reason: no such process or port in call to gen_server:call(undefined, {get_lock,fullsync_source,<0.523.13>}, infinity)
2016-01-18 10:01:36.179 [error] <0.523.13> CRASH REPORT Process <0.523.13> with 1 neighbours exited with reason: no such process or port in call to gen_server:call(undefined, {get_lock,fullsync_source,<0.523.13>}, infinity) in gen_fsm:terminate/7 line 622

Sink:
2016-01-18 09:54:29.167 [error] <0.3744.14> gen_server <0.3744.14> terminated with reason: {tcp_closed,#Port<0.217772>}
2016-01-18 09:54:29.167 [error] <0.3744.14> CRASH REPORT Process <0.3744.14> with 2 neighbours exited with reason: {tcp_closed,#Port<0.217772>} in gen_server:terminate/6 line 744
2016-01-18 09:54:29.167 [error] <0.2540.0> Supervisor riak_repl2_fssink_sup had child undefined started with {riak_repl2_fssink,start_link,undefined} at <0.3041.14> exit with reason {tcp_closed,#Port<0.217772>