- blockReport
blockReport() tells the NameNode about all the locally-stored blocks. The
NameNode returns an array
- commitBlockSynchronization
Commit block synchronization in lease recovery
- sendHeartbeat
sendHeartbeat() tells the NameNode that the DataNode is still alive and well.
Includes some status i
- versionRequest
- errorReport
errorReport() tells the NameNode about something that has gone awry. Useful for
debugging.
- reportBadBlocks
same as
org.apache.hadoop.hdfs.protocol.ClientProtocol#reportBadBlocks(LocatedBlock[])}
- blockReceivedAndDeleted
blockReceived() allows the DataNode to tell the NameNode about recently-received
block data, with a
- registerDatanode
Register Datanode.
- blockReceived
blockReceived() allows the DataNode to tell the NameNode about recently-received
block data, with a
- cacheReport
Communicates the complete list of locally cached blocks to the NameNode. This
method is similar to
#
- processUpgradeCommand
This is a very general way to send a command to the name-node during distributed
upgrade process. Th
- register
Register Datanode. if the reported data transfer version does not match the one
in NameNode, namenod