Error while exeuting query: EOF 03113 and ORA-07445: exception encountered: core dump [] [] [] [] []

Hi,

We are runnign a selct statement and the query has been run directly from the server as well.

Getting the below error,alert log and trace file does not have nay major information.The session comes out and we need to connect again.
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel

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Trace file has the following error:

ksedmp: internal or fatal error
ORA-07445: exception encountered: core dump [] [] [] [] [] []
Current SQL statement for this session:
select xxxx  as ecode,