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Database Hangs with ORA-7445 [kglic0()+1172], PMON Failed to Acquire Latch, ORA-29771 (Doc ID 2128960.1)

Last updated on MAY 20, 2021

Applies to:

Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

Next error is reported in the alert log:

ORA-07445: exception encountered: core dump [kglic0()+1172] [SIGBUS] [ADDR:0xB38F0000000091] [PC:0x1085FB354] [Invalid address alignment] []


The call stack from the trace file shows functions like:

... kglic0 kksIterCursorStat kewrbtsq_build_topsql kewrftsq_flush_topsql kewrft_flush_table kewrftec_flush_table_ehdlcx kewrfat_flush_all_tables kewrfsr_flush_snapshot_r ...


In alert.log, also other errors are reported next to the ORA-7445 in the following order:

ORA-07445: exception encountered: core dump [kglic0()+1172] [SIGBUS] [ADDR:0xB38F0000000091] [PC:0x1085FB354] [Invalid address alignment] []
...
PMON failed to acquire latch, see PMON dump
...
LCK0 (ospid: 29766) waits for latch 'shared pool' for 92 secs.
...
ORA-29771: process USER (OSID 17702) blocks LCK0 (OSID 29766) for more than 70 seconds

 

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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