Github user kiszk commented on the issue: https://github.com/apache/spark/pull/18723 IIUC, this PR avoid data copy for consolidation in `netty.buffer.CompositeByteBuf.consolidateIfNeeded`. I think that it is reasonable. I have two questions to understand this change. 1. Where OOM happens at `consoolidateIfNeeded` in the original code? 2. Is there any downside (e.g. performance degradation) to keep many components in `CompositeByteBuf`?
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