spring boot 3 upgrade causing delays in receiving message from rabbit mq

I'm upgrading from Spring Boot 2.7 to Spring Boot 3.3

• Publisher(another app) publishes to exchange migration.rxi to queue migration.wq to exchange migration.rxo to queue migration.q

Mine is spring integration app with libraries : spring-boot-starter-amqp , spring-integration-amqp spring-boot-starter-integration

The application is currently on single consumer.

Using SimpleMessageListenerContainer : AUTO Acknowledgement Mode

• Consumes message from queue migration.q
• Calls various endpoints
• If an exception occurs, goes to error Channel
• In error channel retry count is incremented and message is put on retry exchange migration.rxo which delivers it to main queue migration.q for re-processing.

When publisher sends to exchange migration.rxo it is quick(microseconds)

When My App sends to exchange (for retry)migration.rxo it takes 5-6 seconds in Spring Boot 2. It is now taking around 35 seconds delay in Spring Boot 3.

My rabbit mq configuration is here :

    {
  "users": [
    {
      "name": "admin",
      "password_hash": "xyz",
      "hashing_algorithm": "pqr",
      "tags": "administrator"
    },
    {
      "name": "user",
      "password_hash": "abc",
      "hashing_algorithm": "mno",
      "tags": ""
    }
  ],
  "vhosts": [
    {
      "name": "/"
    }
  ],
  "permissions": [
    {
      "user": "user",
      "vhost": "/",
      "configure": "",
      "write": ".*",
      "read": ".*"
    },
    {
      "user": "admin",
      "vhost": "/",
      "configure": ".*",
      "write": ".*",
      "read": ".*"
    }
  ],
  "exchanges": [
    {
      "name": "migration.rxi",
      "vhost": "/",
      "type": "direct",
      "durable": false,
      "auto_delete": false,
      "internal": false,
      "arguments": {}
    },
    {
      "name": "migration.rxo",
      "vhost": "/",
      "type": "direct",
      "durable": false,
      "auto_delete": false,
      "internal": false,
      "arguments": {}
    },
    {
      "name": "migration.dlx",
      "vhost": "/",
      "type": "direct",
      "durable": false,
      "auto_delete": false,
      "internal": false,
      "arguments": {}
    },
    {
      "name": "migration.large.rxi",
      "vhost": "/",
      "type": "direct",
      "durable": false,
      "auto_delete": false,
      "internal": false,
      "arguments": {}
    },
    {
      "name": "migration.large.rxo",
      "vhost": "/",
      "type": "direct",
      "durable": false,
      "auto_delete": false,
      "internal": false,
      "arguments": {}
    },
    {
      "name": "migration.large.dlx",
      "vhost": "/",
      "type": "direct",
      "durable": false,
      "auto_delete": false,
      "internal": false,
      "arguments": {}
    }
  ],
  "queues": [
    {
      "name": "migration.q",
      "vhost": "/",
      "durable": false,
      "auto_delete": false,
      "arguments": {
        "x-dead-letter-exchange": "migration.dlx",
        "x-max-length": 10000
      }
    },
    {
      "name": "migration.wq",
      "vhost": "/",
      "durable": false,
      "auto_delete": false,
      "arguments": {
        "x-dead-letter-exchange": "migration.rxo",
        "x-message-ttl": 15000
      }
    },
    {
      "name": "migration.dlq",
      "vhost": "/",
      "durable": false,
      "auto_delete": false,
      "arguments": {}
    },
    {
      "name": "migration.large.q",
      "vhost": "/",
      "durable": false,
      "auto_delete": false,
      "arguments": {
        "x-dead-letter-exchange": "migration.large.dlx",
        "x-max-length": 100000
      }
    },
    {
      "name": "migration.large.wq",
      "vhost": "/",
      "durable": false,
      "auto_delete": false,
      "arguments": {
        "x-dead-letter-exchange": "migration.large.rxo",
        "x-message-ttl": 15000
      }
    },
    {
      "name": "migration.large.dlq",
      "vhost": "/",
      "durable": false,
      "auto_delete": false,
      "arguments": {}
    }
  ],
  "bindings": [
    {
      "source": "migration.rxi",
      "vhost": "/",
      "destination": "migration.wq",
      "destination_type": "queue",
      "routing_key": "",
      "arguments": {}
    },
    {
      "source": "migration.rxo",
      "vhost": "/",
      "destination": "migration.q",
      "destination_type": "queue",
      "routing_key": "",
      "arguments": {}
    },
    {
      "source": "migration.dlx",
      "vhost": "/",
      "destination": "migration.dlq",
      "destination_type": "queue",
      "routing_key": "",
      "arguments": {}
    },
    {
      "source": "migration.large.rxi",
      "vhost": "/",
      "destination": "migration.large.wq",
      "destination_type": "queue",
      "routing_key": "",
      "arguments": {}
    },
    {
      "source": "migration.large.rxo",
      "vhost": "/",
      "destination": "migration.large.q",
      "destination_type": "queue",
      "routing_key": "",
      "arguments": {}
    },
    {
      "source": "migration.large.dlx",
      "vhost": "/",
      "destination": "migration.large.dlq",
      "destination_type": "queue",
      "routing_key": "",
      "arguments": {}
    }
  ]
}

I found out, for gateways the default timeout has changed from 1000ms to 30000ms.

Other then that, the solution that worked for me is changing from outbound gateway to outbound adapters.

Gateway is about request-responseand waits for response whereas adapters is just about send.

As per my requirements, adapters work well. So, I moved from outbound gateway to outbound adapter.