Getting ORA-600  With Freeable Chunks of "Blockers array"
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.
ORA-00600: internal error code, arguments: , , , [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 "
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