hbase reader 组件当请求超时无限请求问题

hbase11xreader插件中Hbase11xReader.java　第77行　fetchOK = this.hbaseTaskProxy.fetchLine(record);

此方法在while true 中调用，异常捕获使用exception 处理所有异常，不是只有脏数据才会抛出异常，如果是第一次请求超时，会无限请求hbase，一直到hbase 宕机且datax进程无法正常退出。这里应该分开捕获特定异常。

Start in hbase11xreader's Hbase11xReader.java at line 77, where hbaseTaskProxy.fetchLine(record) is called inside the while loop. Trace which exceptions represent dirty data versus request failures, then verify that a timeout does not cause endless HBase requests and that the DataX process can exit normally.

Written by the indexing model from the issue text.