Tao Jie created HDFS-10359:
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             Summary: Allow trigger block report from all datanodes
                 Key: HDFS-10359
                 URL: https://issues.apache.org/jira/browse/HDFS-10359
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
    Affects Versions: 2.6.1, 2.7.0
            Reporter: Tao Jie


Since we have HDFS-7278 allows trigger block report from one certain datanode. 
It would be helpful to add a option to this command to trigger block report 
from all datanodes.
Command maybe like this:
*hdfs dfsadmin -triggerBlockReport \[-incremental\] 
<datanode_host:ipc_port|all>*



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