Errors ORA-39126 ORA-4052 ORA-12154 On DataPump Import Using NETWORK_LINK (Doc ID 1301472.1)

Last updated on NOVEMBER 28, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 and later
Information in this document applies to any platform.
***Checked for relevance on 08-Jun-2015***

Symptoms

When importing data from source database version 10.2.0.4 to a RAC target database version 11.2.0.2 using a DataPump NETWORK_LINK and parallelism, it is possible to get the following errors:

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.POST_MT_INIT [SELECT SYS.KUPM$MCP.GET_ENDIANNESS@dwqa FROM SYS.DUAL]
ORA-04052: error occurred when looking up remote object SYS.KUPM$MCP@DWQA
ORA-00604: error occurred at recursive SQL level 3
ORA-12154: TNS:could not resolve the connect identifier specified

ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPW$WORKER", line 8358

----- PL/SQL Call Stack -----
object line object
handle number name
0x45559bc50 19208 package body SYS.KUPW$WORKER
0x45559bc50 8385 package body SYS.KUPW$WORKER
0x45559bc50 2182 package body SYS.KUPW$WORKER
0x45559bc50 1474 package body SYS.KUPW$WORKER
0x45964d818 2 anonymous block

The DataPump import parameters are:

directory=DATA_PUMP_DIR
logfile=impdp.log
network_link="public database link"
schemas="schema name"
parallel=4

Cause

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