ExecuteJobServerOnlineShardingTask createLocalShard occurs ArrayIndexOutOfBoundsException

[heziai]

异常堆栈如下：

[2018-06-25 17:13:47.993] [ERROR] [it-saturn-Worker] [c.v.s.job.sharding.task.AbstractAsyncShardingTask] >>> 3
java.lang.ArrayIndexOutOfBoundsException: 3
	at com.vip.saturn.job.sharding.task.ExecuteJobServerOnlineShardingTask.createLocalShard(ExecuteJobServerOnlineShardingTask.java:65)
	at com.vip.saturn.job.sharding.task.ExecuteJobServerOnlineShardingTask.pickIntelligent(ExecuteJobServerOnlineShardingTask.java:209)
	at com.vip.saturn.job.sharding.task.ExecuteJobServerOnlineShardingTask.pick(ExecuteJobServerOnlineShardingTask.java:311)
	at com.vip.saturn.job.sharding.task.AbstractAsyncShardingTask.run(AbstractAsyncShardingTask.java:83)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

发生的场景举例如下：
本地作业，4个Executor在线。->
下线分片为0、1、2的Executor。->
上线一个Executor。

Note：虽然会抛异常，但是上层会catch该异常，并进行全量分片，所以仍然能正常工作。