First step towards data transter protocol compatibility: support DatanodeProtocol#getDataTransferProtocolVersion ----------------------------------------------------------------------------------------------------------------
Key: HDFS-1578 URL: https://issues.apache.org/jira/browse/HDFS-1578 Project: Hadoop HDFS Issue Type: New Feature Reporter: Hairong Kuang Assignee: Hairong Kuang Fix For: 0.23.0 HADOOP-6904 allows us to handle RPC changes in a compatible way. However, we have one more protocol to take care of, the data transfer protocol, which a dfs client uses to read data from or write data to a datanode. My proposal is to add a new RPC getDataTransferVersion to DatanodeProtocol that returns the data transfer protocol version running on the datanode. A dfs client gets the datanode's version number before it reads from/writes to a datanode. With this, the dfs client could behave differently according to datanode's data transfer version. This provides a base for us to make data transfer protocol changes in a compatible way. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.