ORA-3113 while running export (first run ok, second run fails)

Question

Hi,
I'm running 10g (10.1.0.2.0) on gentoo Linux.
After a restart of the database I can do an EXP for any user without errors. But when I repeat the same command after the export I get the following error:
. . exporting table WEB_SESSION_DATA 0 rows exported
. exporting synonyms
EXP-00008: ORACLE error 3113 encountered
ORA-03113: end-of-file on communication channel
EXP-00000: Export terminated unsuccessfully
It's always the same error on the same task (exporting synonyms) but always just for the second and any later export, while the first one is ok.
I read through some forums and found, that ORA-3113 is a standard error which just hides the real error. So I look into the trace files and found:
ksedmp: internal or fatal error
ORA-07445: exception encountered: core dump [jox_lookup_known_object()+413] [SIGSEGV] [Address not mapped to object] [0x1AD14034] [] []
Current SQL statement for this session:
SELECT SYNNAM, DBMS_JAVA.LONGNAME(SYNNAM), DBMS_JAVA.LONGNAME(SYNTAB), TABOWN, TABNODE, PUBLIC$, SYNOWN, SYNOWNID, TABOWNID, SYNOBJNO FROM SYS.EXU9SYN WHERE SYNOWNID = :1 ORDER BY SYNTIME
If I call this SQL from sqlplus I get the same ORA-3113, so this seems to be the cause for the export failure.
When I remove the DBMS_JAVA.LONGNAME calls from the statement, it runs fine. It also runs fine, when I add a "and 1=0" to the EXU9SYN view. But this will not really solve the problem, because then all synonyms don't get exported.
I also checked all the synonyms and they are valid, the referenced tables exist and can be queried.
Because we use JavaStoredProcedures I cannot remove the Java Features in Oracle. But I reinstalled it (rmjvm.sql and initjvm.sql) but this did not help.
Does anyone have an idea what's happening here?
Especially the "first run ok, second run fails" seems to be very strange, because DB objects including DBMS_JAVA should be ok, if the first export can be done. So what changes in the database during or after the first run?

Answer 1

Maybe description for bug 3953108 (ORA-7445 AND ORA-3113 DURING DIRECT FULL DATABASE EXPORT OF PUBLIC SYNONYMS) is helpful.
Werner