Oracle Database Proactive Bundle 12.1.0.2 April 2018 changes DataPump File Format Number

After applying Oracle Database Proactive Bundle Patch (DBBP) 12.1.0.2 April 2018 (Patch 27486326), the datapump dump file internal format is changed from version 4.1 to version 4.2. The effect is, that a dump file created with DataPump from Version 12.1.0.2 DBBP 180417 can no longer be imported in any lower database except when the datapump export is performed with VERSION=12.1 clause.

MOS 462488.1 gives a script to extract Dump File Version from file:

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SQL> exec show_dumpfile_info('DATA_PUMP_DIR','test.dmp'); 
---------------------------------------------------------------------------- 
Purpose..: Obtain details about export dumpfile. Version: 18-DEC-2013 
Required.: RDBMS version: 10.2.0.1.0 or higher 
. Export dumpfile version: 7.3.4.0.0 or higher 
. Export Data Pump dumpfile version: 10.1.0.1.0 or higher 
Usage....: execute show_dumfile_info('DIRECTORY', 'DUMPFILE'); 
Example..: exec show_dumfile_info('MY_DIR', 'expdp_s.dmp') 
---------------------------------------------------------------------------- 
Filename.: test.dmp 
Directory: DATA_PUMP_DIR 
Disk Path: ...
Filetype.: 1 (Export Data Pump dumpfile) 
---------------------------------------------------------------------------- 
...Database Job Version..........: 12.01.00.02.00 
...Internal Dump File Version....: 4.2 
...Creation Date.................: Tue Jun 05 16:23:31 2018 
...File Number (in dump file set): 1 
...Master Present in dump file...: 1 (Yes) 
...Master in how many dump files.: 1 
...Master Piece Number in file...: 1 
...Operating System of source db.: x86_64/Linux 2.4.xx 
...Instance Name of source db....: myhost:MYINST 
...Characterset ID of source db..: 178 (WE8MSWIN1252) 
...Language Name of characterset.: WE8MSWIN1252 
...Job Name......................: "MYUSER"."SYS_EXPORT_FULL_01" 
...GUID (unique job identifier)..: 6DE6CAA3E6377A30E053A505120A8FB1 
...Block size dump file (bytes)..: 4096 
...Metadata Compressed...........: 1 (Yes) 
...Data Compressed...............: 0 (No) 
...Compression Algorithm.........: 3 (Basic) 
...Metadata Encrypted............: 0 (No) 
...Table Data Encrypted..........: 0 (No) 
...Column Data Encrypted.........: 0 (No) 
...Encryption Mode...............: 2 (None) 
...Internal Flag Values..........: 514 
...Max Items Code (Info Items)...: 23 
---------------------------------------------------------------------------- 
 
PL/SQL procedure successfully completed.

When trying to import dump in lower version database, this error is raised:

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ORA-39001: invalid argument value 
ORA-39000: bad dump file specification 
ORA-39142: incompatible version number 4.2 in dump file "test.dmp"

Only workaround is to use option “VERSION=12.1” when performing the datapump export.

Update 14.06.2018: Oracle Support has published a MOS Note for this issue today: 2409523.1

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