I left blank in Schema filed. Then click check. I got connection successful.
But if I entered schema name, I got "Connection failure. You must change the Database Settings.
com.ibm.db2.jcc.a.SqlException: DB2 SQL error: SQLCODE: -204, SQLSTATE: 42704, SQLERRMC: SYSIBM.SYSSCHEMATA"
So there is no table schema or view schema can be generated.
But I think Talend must have a bug in new version 5.2.1, it cannot generate metadata for mainframe. But version 4.1.2 can.