hadoop2.0 distcp checksum mismatch

在往 2.0版本做数据迁移时碰到check-sum错误

Caused by: java.io.IOException: Check-sum mismatch between        

at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.compareCheckSums(RetriableFileCopyCommand.java:144)

        at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.doCopy(RetriableFileCopyCommand.java:108)
        at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.doExecute(RetriableFileCopyCommand.java:83)
        at org.apache.hadoop.tools.util.RetriableCommand.execute(RetriableCommand.java:87)

        ... 11 more

cdh官网上提供二种解决方案

1. 修改hdfs-site.xml

dfs.checksum.type = CRC32

2.加 -skipcrccheck参数