用sqoop连接db2

[feature_09]

用sqoop 连接db2，一直显示

ERROR manager.SqlManager: Error executing statement: com.ibm.db2.jcc.am.DisconnectNonTransientConnectionException: [jcc][t4][2043][11550][4.21.29] Exception java.net.NoRouteToHostException: Error opening socket to server /192.168.18.21 on port 50,000 with message: No route to host. ERRORCODE=-4499, SQLSTATE=08001

No route to host. ERRORCODE=-4499, SQLSTATE=08001
这句究竟是作甚用的？
有没有DB2的大神指点一下，谢谢啦。