The leader election recipe documentation suggest that to avoid the herd effect a client process volunteering for leadership via child znode [i] under the leader election path [/leader] must only watch the the SMALLEST znode [j] from a different client process such that [j < i].
This will NOT avoid the herd effect as many clients will end up watching the same znode[j] where j is the next-in-sequence number greater than the number of the current leader.
Specifically in Step 3 of the Election procedure here http://zookeeper.apache.org/doc/trunk/recipes.html#sc_leaderElection
This "where j is the SMALLEST sequence number" should be changed to this
"where j is the LARGEST sequence number"
|Status||Patch Available [ 10002 ]||Resolved [ 5 ]|
|Resolution||Fixed [ 1 ]|
|Status||Open [ 1 ]||Patch Available [ 10002 ]|
|Fix Version/s||3.4.4 [ 12319841 ]|
|Fix Version/s||3.5.0 [ 12316644 ]|
|Field||Original Value||New Value|
|Assignee||Michi Mutsuzaki [ michim ]|