andygrove commented on PR #1945:
URL: 
https://github.com/apache/datafusion-ballista/pull/1945#issuecomment-4884477269

   Superseded by #1946. Instrumenting the failure (h2=debug) showed the root 
cause is connection *churn* — ~3,500 client-initiated connection closes per 
query racing in-flight reads — not just a per-connection lifecycle issue. 
Holding the connection for the stream lifetime (this PR) reduced but didn't 
eliminate the intermittent broken pipe. #1946 fixes it at the source by reusing 
a small bounded pool of multiplexed connections per endpoint instead of 
one-per-fetch. Closing in favor of that.


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