RESOLVED: Failed rebalance

Added a node to my cluster and attempted to rebalance from the console.

Rebalance exited with reason {{change_filter_failed,
{'EXIT',
{{badmatch,
{failed,
{error,
{badmatch,
{memcached_error,auth_error,
<<"Auth failure">>}},
[{ebucketmigrator_srv,connect,4},
{ebucketmigrator_srv,handle_call,3},
{gen_server,handle_msg,5},
{proc_lib,init_p_do_apply,3}]}}},
[{ns_vbm_sup,
'-local_change_vbucket_filter/4-fun-2-',6},
{misc,'-executing_on_new_process/1-fun-0-',
3}]}}},
[{ns_vbm_sup,change_vbucket_filter,4},
{ns_vbm_sup,'-set_replicas/3-fun-2-',5},
{lists,foldl,3},
{ns_vbm_sup,set_replicas,3},
{ns_vbm_sup,'-set_replicas_on_nodes/3-fun-1-',
3},
{lists,foreach,2},
{ns_vbm_sup,apply_changes,2},
{ns_vbucket_mover,sync_replicas,0}]}

Don't know the best way to read this, but Auth failure certainly got my attention... Anyone who knows how to get more from this? And also whether this error could relate to the other problems I am having with this bucket? (see 2 other forum posts)

UPDATE: removed the pw from the SASL bucket and tried again. Did not receive this error the 2nd time. Can't tell yet whether the rebalance operation kickstarted the bucket which is not flushing to disk or not, however.