So far, there is no document about distcp command in Talend.
There will be conflict jar issue if your transfer data directly from one server to another (different environments), such as, thdfsinput-->thdfsoutput.
Could you please try to use tsqoopXXX component to call sqoop to transfer data from the Hadoop Distributed File System (HDFS) to a relational database management system and then call Sqoop to transfer data from a relational database management system (RDBMS) into the Hadoop Distributed File System (HDFS)?
The work flow should be:HDFS(A) -->MySql(oracle...)------> Mysql(oracle....)-->HDFS(B)
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