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Vinayakumar B commented on HDFS-7264: ------------------------------------- Thanks [~szetszwo], One nit, 1. Typo in {{DFS_DATANODE_WRITE_HEARTBEAT_EANBLE_KEY}} and {{DFS_DATANODE_WRITE_HEARTBEAT_EANBLE_DEFAULT}} > Tha last datanode in a pipeline should send a heartbeat when there is no > traffic > -------------------------------------------------------------------------------- > > Key: HDFS-7264 > URL: https://issues.apache.org/jira/browse/HDFS-7264 > Project: Hadoop HDFS > Issue Type: Improvement > Components: datanode > Reporter: Tsz Wo Nicholas Sze > Assignee: Tsz Wo Nicholas Sze > Attachments: h7264_20141017.patch > > > When the client is writing slowly, the client will send a heartbeat to signal > that the connection is still alive. This case works fine. > However, when a client is writing fast but some of the datanodes in the > pipeline are busy, a PacketResponder may get a timeout since no ack is sent > from the upstream datanode. We suggest that the last datanode in a pipeline > should send a heartbeat when there is no traffic. -- This message was sent by Atlassian JIRA (v6.3.4#6332)