通过spark读取hbase数据线程池拒绝连接

借助Hive的HBaseTableInputFormat建表然后在sparksql中分析hbase表数据，10000条数据在虚拟机上可以正常运行，在物理机上10w条数据却报异常，错误信息如下：
 org.apache.spark.SparkException: Job aborted due to stage failure: Task 2 in stage 1.0 failed 1 times, most recent failure: Lost task 2.0 in stage 1.0 (TID 3, localhost): java.lang.RuntimeException: java.util.concurrent.                                                  : Task org.apache.hadoop.hbase.client.ResultBoundedCompletionService$QueueingFutureQueueingFuture@37b2d978 rejected from java.util.concurrent.ThreadPoolExecutor@46477dd0
    at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:208)
    at org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:320)
    at org.apache.hadoop.hbase.client.ClientScanner.loadCache(ClientScanner.java:403)
    at org.apache.hadoop.hbase.client.ClientScanner.next(ClientScanner.java:364)
    at org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl.nextKeyValue(TableRecordReaderImpl.java:205)
    at org.apache.hadoop.hbase.mapreduce.TableRecordReader.nextKeyValue(TableRecordReader.java:147)
    at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase$1.nextKeyValue(TableInputFormatBase.java:216)
    at