Applies to:
Oracle Server - Enterprise Edition - Version: 11.1.0.6 to 11.2.0.1 - Release: 11.1 to 11.2
Information in this document applies to any platform.

Symptoms

The following error occurs:

ORA-07445: exception encountered: core dump [dbgrmqmqpk_query_pick_key()+2171] [SIGSEGV] [ADDR:0x0] 
[PC:0x2445DE3] [SI_KERNEL(general_protection)] []

The call stack will resemble the following:
dbgrmqmqpk_query_pick_key dbgrmqmfs_fetch_setup dbgrmqmf_fetch_real dbgrmqmf_fetch dbgrip_fetch_record 
dbgrip_relation_iterator dbgripricm_rltniter_wcbf_mt dbgripdrm_dmldrv_mt dbghmm_delete_info_records 
dbghmo_purge_hm_schema dbgrupipscb_hm_pgsvc_cbf dbgruppm_purge_main dbkrapg_auto_purge kewraps_auto_purge_slave
kebm_slave_main ksvrdp opirip opidrv sou2o opimai_real ssthrdmain main




Cause
This is due to Bug 9390347 fixed in 12.1 & 11.2.0.2, where a core dump can occur 
in module dbgrmqmqpk_query_pick_key() whilst purging HM contents from ADR.

Solution
- Either install our 11.2.0.2 patchset

- Or download and apply Patch 9390347 if available for your version/platform.

- On Windows, you can also install Bundle Patch 11.1.0.7.31 or above.

There is no workaround to this error, 
however the error is not serious and does not cause any harm to your database.

References
BUG:9390347 - DIA-48457 [11] [[SI_SIGNO=11] [SI_ERRNO=0] [SI_C] [0XFFFFFFFFFFE0A48] [] [] [] [