手动修复 under-replicated blocks in

切换到hdfs用户，执行：

su - hdfs
hdfs fsck / | grep 'Under replicated' | awk -F':' '{print $1}' >> /tmp/under_replicated_files

新建脚本repair.sh并执行：

cd /tmp && touch repair.sh && chmod u+x repair.sh

脚本内容如下：

for hdfsfile in `cat /tmp/under_replicated_files`;do 
    echo "Fixing $hdfsfile :" ;
    hadoop fs -setrep 3 $hdfsfile; 
done