ding, we will create at most one timer per key in any given second. Flink documentation provides some additional [<u>details</u>](//nightlies.apache.org/flink/flink-docs-release-1.11/dev/stream/operators/process_function.html#timer-coalescing).
</div>
<ol start="7">
<li>The <code>onTimer</code> method will trigger the clean-up of the window state.</li>
</ol>
<p>As previously described, we are always keeping as many events in the
state as required for the evaluation of an active rule with the widest
window s