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Flow dropping only "HEAD" span #6375

Answered by jpkrohling
EvertonSA asked this question in Q&A
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Unfortunately, I think you are hitting a limitation of the tail-sampling processor: you configured the processor to wait 180s before making a decision, and once that happens, either all spans being held in memory are selected, or are dropped. From that point, if any new spans belonging to the same trace are seen, they are treated as a new trace by this processor, as we don't keep track of which traces were selected or dropped. In your case, you have spans arriving way past 180s, which explains why the root span was dropped but not the child spans.

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