ORA-12801: error signaled in parallel query server string

When I run the SQL as parallel execution using Parallel hint, I got ” ORA-12801: error signaled in parallel query server string ORA-08103 ” error.

ORA-12801: error signaled in parallel query server string

Details of error are as follows.

SQL> SELECT REPORT_DAY,count(*) FROM MEHMET.DEVECI
2 GROUP BY REPORT_DAY;
SELECT REPORT_DAY,count(*) FROM MEHMET.DEVECI
*
ERROR at line 1:
ORA-12801: error signaled in parallel query server P00B, instance
msddb01.msd.local:MSD1 (1)
ORA-08103: object no longer exists

ORA-12801: error signaled in parallel query server string

Cause: A parallel query server reached an exception condition.

Action: Check the following error message for the cause, and consult your error manual for the appropriate action.

ORA-08103: object no longer exists

This error is related with Partitioned table and Parallel execution on Cluster Nodes.

To solve this problem, You can run the same SQL as follows.

set the following trace events, then run the same SQL as follows.

alter session set events '10384 trace name context forever , level 16384';

SQL> alter session set events '10384 trace name context forever , level 16384';

Session altered.

SQL> ALTER SESSION SET PARALLEL_FORCE_LOCAL=TRUE;

Session altered.

SQL>
SQL> SELECT /*+ PARALLEL(16) */ REPORT_DAY,count(*) FROM MEHMET.DEVECI
2 GROUP BY REPORT_DAY;

REPORT_D COUNT(*)
-------- ----------
20200101 143879088
20200102 143900001
20200103 143919894
20200104 143939085
20200105 143949689
20200106 143974041
20200107 143999241
20200108 144019865
20200109 144040582
20200110 144062839
20200111 144083914

REPORT_D COUNT(*)
-------- ----------
20200112 144095191
20200113 144120876
20200114 144141403
20200115 144167352

15 rows selected.

SQL>

Or To solve this error, Increase the  sort_area_size as follows.

SQL> show parameter sort_area

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
sort_area_retained_size integer 0
sort_area_size integer 65536
SQL>



alter session set sort_area_size = 640000 scope=both sid='*';

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