dhinesherode91 commented on issue #8429:
URL: https://github.com/apache/pulsar/issues/8429#issuecomment-955159405


   @congbobo184 The issue is not yet resolved. We are using Pulsar 2.7.1. Both 
broker and Pulsar client are using the same version. Our consumer is subscribed 
to a single topic only. Ours is an AVRO schema based topic. 
   On debugging the code, I could arrive at one point, Once the consumer 
receives the first message it  checks the schema version of the message and 
asks the broker for the schema details. At that time when the broker is serving 
heavy loads and is unable to process the request, then the client cannot get 
the schema and it can throw the above exception. Is it possible ?
   
   Also I would like to know what is the proper configuration for Pulsar 
production load ?
   Currently our Pulsar will receive 10K messages per minute and will grow to 
100K in near future. 
   We have deployed our Pulsar in AWS Kubernetes (m5.xlarge instances 
nodegroup) with, 
   5 brokers (each 1CPU, 3Gi Memory),
   5 bookies (each 1CPU, 4Gi Memory with separate ledger and journal mounted as 
EBS), 
   5 zookeeper (each 500m CPU, 2Gi Memory) , 
   5 proxy instances (each 500m CPU, 2Gi Memory). 
   With this above configuration, we are facing connection exception 
occasionally. Kindly advise.


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