hdfs write慢的问题

从mysql -> hdfs,如果hdfs节点很慢，会出现mysql reader会出现下面的错误
om.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 11,964 milliseconds ago. The last packet sent successfully to the server was 250,561 milliseconds ago

因为是全表导入，一般需要花2个小时时间，如果正好遇到比较差的datanode,就会出现上述错误，造成任务重试
请问一下，有什么优雅的处理方式，多谢

The issue describes a MySQL-to-HDFS full-table import that fails when an HDFS node is slow, but names no files or tests. Start by tracing the MySQL reader and HDFS writer paths and the JDBC communications-timeout handling. Done should be defined as a long import remaining reliable despite slow HDFS nodes, with coverage for the reported failure scenario.

Written by the indexing model from the issue text.