Github user gatorsmile commented on a diff in the pull request:
    --- Diff: docs/ ---
    @@ -1334,6 +1334,17 @@ Apart from these, the following properties are also 
available, and may be useful
         Should be greater than or equal to 1. Number of allowed retries = this 
value - 1.
    +  <td><code>spark.task.assigner</code></td>
    +  <td>org.apache.spark.scheduler.RoundRobinAssigner</td>
    +  <td>
    +    The strategy of how to allocate tasks among workers with free cores.
    +    By default, round robin with randomness is used.
    +    org.apache.spark.scheduler.BalancedAssigner tries to balance the task 
across all workers (allocating tasks to
    +    workers with most free cores). 
org.apache.spark.scheduler.PackedAssigner tries to allocate tasks to workers
    +    with the least free cores, which may help releasing the resources when 
dynamic allocation is enabled.
    --- End diff --
    when dynamic allocation is enabled. ->
    when dynamic allocation (`spark.dynamicAllocation.enabled`) is enabled. 

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