https://community.cloudera.com/t5/Support-Questions/DATANODE-Failed-to-replace-a-bad-datanode-on-the-existing/m-p/184153#M146300 <P><EM><A href="https://community.hortonworks.com/questions/202369/@Michael%20Bronson">@Michael Bronson</A></EM></P><P><EM><A href="https://community.hortonworks.com/questions/202369/@Michael%20Bronson"></A>Do you still have this below parameter set to true? Remove it completely and retry and please paste the error </EM></P><P><EM></EM></P><EM></EM><PRE><EM>dfs.client.block.write.replace-datanode-on-failure.enable </EM></PRE> <P><EM>Regard</EM></P> Sun, 15 Jul 2018 19:16:45 GMT Shelton 2018-07-15T19:16:45Z