MINOR: Add notes for 2.6 on reassignment tool changes
Add some notable changes to the reassignment tool for the 2.6 release.
Reviewers: Randall Hauch
Fetch requests and other requests intended only for the leader or follower return NOT_LEADER_OR_FOLLOWER(6) instead of REPLICA_NOT_AVAILABLE(9)
if the broker is not a replica, ensuring that this transient error during reassignments is handled by all clients as a retriable exception.
</li>
+ <li>There are several notable changes to the reassignment tool <code>kafka-reassign-partitions.sh</code>
+ following the completion of
+ <a href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-455%3A+Create+an+Administrative+API+for+Replica+Reassignment">KIP-455</a>.
+ This tool now requires the <code>--additional</code> flag to be provided when changing the throttle of an
+ active reassignment. Reassignment cancellation is now possible using the
+ <code>--cancel</code> command. Finally, reassignment with <code>--zookeeper</code>
+ has been deprecated in favor of <code>--bootstrap-server</code>. See the KIP for more detail.
+ </li>
</ul>
<h5><a id="upgrade_250_notable" href="#upgrade_250_notable">Notable changes in 2.5.0</a></h5>
