问题
we have a hadoop-core-0.20.2-cdh3u1.jar based java client.
Would it be safe to work against a server (cluster) running apache distributed 0.20.xx?
Or did cloudera break some apache APIs?
Thanks
回答1:
probably a bad idea. Tried working with a client using hadoop-core version 0.20.203.0 against a server with cdh3u1 and got:
org.apache.hadoop.ipc.RPC$VersionMismatch:
Protocol org.apache.hadoop.hdfs.protocol.ClientProtocol version mismatch. (client = 61, server = 63)
Didn't try the other way around...
来源：https://stackoverflow.com/questions/10871442/cdh3-client-interoperable-with-apache-hadoop-server-0-20-xx