under replicated blocks 解决： 找出没有复制的block: hdfs fsck / | grep 'Under replicated' | awk -F':' '{print $1}' >> /tmp/under_replicated_files 然后循环修复： for hdfsfile in `cat /tmp/under_replicated_files`; do echo "Fixing $hdfsfile :" ; hadoop fs -setrep 3 $hdfsfile; done 输出如下： Fixing /user/hdfs/.staging/job_1547173493660_0405/job.jar : Replication 3 set: /user/hdfs/.staging/job_1547173493660_0405/job.jar Fixing /user/hdfs/.staging/job_1547173493660_0405/job.split : Replication 3 set: /user/hdfs/.staging/job_1547173493660_0405/job.split Fixing /user/hdfs/.staging/job_1547173493660_0481/job.jar : Replication 3 set: /user/hdfs/.staging/job_1547173493660_0481/job.jar Fixing /user/hdfs/.staging/job_1547173493660_0481/job.split : Replication 3 set: /user/hdfs/.staging/job_1547173493660_0481/job.split Fixing /user/hdfs/.staging/job_1547173493660_0483/job.jar : Replication 3 set: /user/hdfs/.staging/job_1547173493660_0483/job.jar Fixing /user/hdfs/.staging/job_1547173493660_0483/job.split : Replication 3 set: /user/hdfs/.staging/job_1547173493660_0483/job.split Fixing /user/hdfs/.staging/job_1547197402450_0021/job.jar : Replication 3 set: /user/hdfs/.staging/job_1547197402450_0021/job.jar Fixing /user/hdfs/.staging/job_1547197402450_0021/job.split : Replication 3 set: /user/hdfs/.staging/job_1547197402450_0021/job.split