@denysobukhov  If this issue hasn't been resolved I am suspecting the HS2 idle Timeout and Thread pool size. Can you please do the below and share the out come. 1. Address Server-Side Resource or Timeout Issues Increase HiveServer2 Idle Timeout By default, HiveServer2 may close idle connections after a certain period. Increase this timeout: Update the HiveServer2 config: hive.server2.idle.session.timeout (default: 600000 ms / 10 minutes). Set it to a larger value, e.g., 3600000 (1 hour). hive.server2.idle.operation.timeout (default: 5 minutes for operations). Increase to match your app's use case. SET hive.server2.idle.session.timeout=3600000; SET hive.server2.idle.operation.timeout=3600000; Adjust Thread Pool Size If HiveServer2 runs out of threads to handle requests, it can drop connections: Increase hive.server2.threads to a higher value in HiveServer2 configurations. Restart HiveServer2 after changes. First check the default hive.server2.thrift.max.worker.threads  jstack -l <HiveServere2_ProccessId> | grep ".Thread.Stat" | wc -l Happy hadooping                                 ... View more