Getting ORA-600  With Freeable Chunks of "Blockers array"
(Doc ID 727024.1)
Last updated on FEBRUARY 03, 2019
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 "
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