Claim lock for dead process  in a trace file

Has anyone seen messages like this in a trace file?
Any clues on whats causing it?
claim lock for dead process][lp 0x39dc41d50][p 0x39e626f70.7242][hist x49514951]
[claim lock for dead process][lp 0x39de15308][p 0x39e626aa0.7179][hist
x49514951]
[claim lock for dead process][lp 0x39de15068][p 0x39e626aa0.7179][hist
x49514951]
[claim lock for dead process][lp 0x39dc41c00][p 0x39e626f70.7242][hist
x49514951]
[claim lock for dead process][lp 0x39de0f908][p 0x39e626aa0.7179][hist
x49514951]
*

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