ruanweihong-aaa commented on issue #13474:
URL: https://github.com/apache/apisix/issues/13474#issuecomment-6434536839

   @jackiechan1981 The earlier mock test deliberately stalled the TLS 
handshake, so both versions timed out. This does not mean both versions have 
the same bug.
   
   A TCP connection timeout can also produce this error. Your configuration 
already uses HTTPS, and the logs show that DNS resolution completed before the 
approximately 30-second wait. We need to distinguish whether the connection 
stalled during TCP establishment or the TLS handshake.
   
   We tested 3.14.1 and 3.16.0 with controlled local upstreams but have not 
reproduced a 3.16-only failure. Could you capture the upstream traffic from the 
APISIX container’s network namespace during a failure and run a direct request 
from the same environment, using the same destination IP and hostname/SNI? This 
would help identify where the connection stalls.


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