Getting ORA-600 [723] With Freeable Chunks of "Blockers array" (Doc ID 727024.1)

Last updated on NOVEMBER 28, 2016

Applies to:

Oracle Server - Enterprise Edition - Version: 10.2.0.1 to 10.2.0.3
This problem can occur on any platform.

Symptoms

Getting the following ORA-600 in the alert log of RAC instances:

ORA-00600: internal error code, arguments: [723], [174016], [174016], [memory leak], [], [], [], []

Checking the trace file for the heapdump of the pga heap, it shows many freeable allocations with "Blockers array" comment. For example:
  Chunk       2a974b67e8 sz=       40    freeable  "Blockers array "


Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms