heesung-sn commented on PR #24198:
URL: https://github.com/apache/pulsar/pull/24198#issuecomment-2825241532

   ```
   
   025-04-23T17:24:29,943 - INFO  - 
[broker-client-shared-timer-3831-1:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Reconnecting after 
connection was closed
   2025-04-23T17:24:29,943 - ERROR - [pulsar-io-3827-2:ClientCnx] - [id: 
0x98851c07, L:/127.0.0.1:38968 - R:localhost/127.0.0.1:39047] Close connection 
because received internal-server error Failed due to pulsar service is not ready
   2025-04-23T17:24:29,943 - WARN  - 
[pulsar-io-3827-2:BinaryProtoLookupService] - 
[persistent://pulsar/localhost:46767/healthcheck] failed to send lookup request 
: {"errorMsg":"Failed due to pulsar service is not 
ready","reqId":1309846097817120391, "remote":"localhost/127.0.0.1:39047", 
"local":"/127.0.0.1:38968"}
   2025-04-23T17:24:29,943 - INFO  - [pulsar-io-3827-3:ServerCnx] - Closed 
connection from /127.0.0.1:38968
   2025-04-23T17:24:29,943 - WARN  - [pulsar-io-3827-2:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Error connecting to 
broker: org.apache.pulsar.client.api.PulsarClientException$LookupException: 
{"errorMsg":"Failed due to pulsar service is not 
ready","reqId":1309846097817120391, "remote":"localhost/127.0.0.1:39047", 
"local":"/127.0.0.1:38968"}
   2025-04-23T17:24:29,944 - WARN  - [pulsar-io-3827-2:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Could not get 
connection to broker: 
org.apache.pulsar.client.api.PulsarClientException$LookupException: 
{"errorMsg":"Failed due to pulsar service is not 
ready","reqId":1309846097817120391, "remote":"localhost/127.0.0.1:39047", 
"local":"/127.0.0.1:38968"} -- Will try again in 6.278 s
   2025-04-23T17:24:29,944 - INFO  - [pulsar-io-3827-2:ClientCnx] - [id: 
0x98851c07, L:/127.0.0.1:38968 ! R:localhost/127.0.0.1:39047] Disconnected
   2025-04-23T17:24:36,222 - INFO  - 
[broker-client-shared-timer-3831-1:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Reconnecting after 
connection was closed
   2025-04-23T17:24:36,223 - INFO  - [pulsar-io-3827-2:ConnectionPool] - [[id: 
0x38e1d6f8, L:/127.0.0.1:45886 - R:localhost/127.0.0.1:39047]] Connected to 
server
   2025-04-23T17:24:36,223 - INFO  - [pulsar-io-3827-3:ServerCnx] - Closed 
connection from /127.0.0.1:45886
   2025-04-23T17:24:36,223 - WARN  - [pulsar-io-3827-2:ClientCnx] - [id: 
0x38e1d6f8, L:/127.0.0.1:45886 - R:localhost/127.0.0.1:39047] Received error 
from server: Failed due to pulsar service is not ready
   2025-04-23T17:24:36,223 - WARN  - [pulsar-io-3827-2:ClientCnx] - [id: 
0x38e1d6f8, L:/127.0.0.1:45886 - R:localhost/127.0.0.1:39047] Received unknown 
request id from server: -1
   2025-04-23T17:24:36,223 - INFO  - [pulsar-io-3827-2:ClientCnx] - [id: 
0x38e1d6f8, L:/127.0.0.1:45886 ! R:localhost/127.0.0.1:39047] Disconnected
   2025-04-23T17:24:36,223 - WARN  - [pulsar-io-3827-2:ConnectionPool] - [[id: 
0x38e1d6f8, L:/127.0.0.1:45886 ! R:localhost/127.0.0.1:39047]] Connection 
handshake failed: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed
   2025-04-23T17:24:36,223 - WARN  - [pulsar-io-3827-2:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Error connecting to 
broker: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed
   2025-04-23T17:24:36,223 - WARN  - [pulsar-io-3827-2:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Could not get 
connection to broker: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed -- Will try again in 12.591 s
   2025-04-23T17:24:48,815 - INFO  - 
[broker-client-shared-timer-3831-1:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Reconnecting after 
connection was closed
   2025-04-23T17:24:48,816 - INFO  - [pulsar-io-3827-5:ConnectionPool] - [[id: 
0xb1377a2b, L:/127.0.0.1:36110 - R:localhost/127.0.0.1:39047]] Connected to 
server
   2025-04-23T17:24:48,816 - WARN  - [pulsar-io-3827-5:ClientCnx] - [id: 
0xb1377a2b, L:/127.0.0.1:36110 - R:localhost/127.0.0.1:39047] Received error 
from server: Failed due to pulsar service is not ready
   2025-04-23T17:24:48,816 - WARN  - [pulsar-io-3827-5:ClientCnx] - [id: 
0xb1377a2b, L:/127.0.0.1:36110 - R:localhost/127.0.0.1:39047] Received unknown 
request id from server: -1
   2025-04-23T17:24:48,816 - INFO  - [pulsar-io-3827-6:ServerCnx] - Closed 
connection from /127.0.0.1:36110
   2025-04-23T17:24:48,816 - INFO  - [pulsar-io-3827-5:ClientCnx] - [id: 
0xb1377a2b, L:/127.0.0.1:36110 ! R:localhost/127.0.0.1:39047] Disconnected
   2025-04-23T17:24:48,816 - WARN  - [pulsar-io-3827-5:ConnectionPool] - [[id: 
0xb1377a2b, L:/127.0.0.1:36110 ! R:localhost/127.0.0.1:39047]] Connection 
handshake failed: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed
   2025-04-23T17:24:48,816 - WARN  - [pulsar-io-3827-5:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Error connecting to 
broker: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed
   2025-04-23T17:24:48,816 - WARN  - [pulsar-io-3827-5:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Could not get 
connection to broker: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed -- Will try again in 5.125 s
   2025-04-23T17:24:53,942 - INFO  - 
[broker-client-shared-timer-3831-1:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Reconnecting after 
connection was closed
   2025-04-23T17:24:53,942 - INFO  - [pulsar-io-3827-8:ConnectionPool] - [[id: 
0xadf30373, L:/127.0.0.1:54096 - R:localhost/127.0.0.1:39047]] Connected to 
server
   2025-04-23T17:24:53,943 - WARN  - [pulsar-io-3827-8:ClientCnx] - [id: 
0xadf30373, L:/127.0.0.1:54096 - R:localhost/127.0.0.1:39047] Received error 
from server: Failed due to pulsar service is not ready
   2025-04-23T17:24:53,943 - WARN  - [pulsar-io-3827-8:ClientCnx] - [id: 
0xadf30373, L:/127.0.0.1:54096 - R:localhost/127.0.0.1:39047] Received unknown 
request id from server: -1
   2025-04-23T17:24:53,943 - INFO  - [pulsar-io-3827-1:ServerCnx] - Closed 
connection from /127.0.0.1:54096
   2025-04-23T17:24:53,943 - INFO  - [pulsar-io-3827-8:ClientCnx] - [id: 
0xadf30373, L:/127.0.0.1:54096 ! R:localhost/127.0.0.1:39047] Disconnected
   2025-04-23T17:24:53,943 - WARN  - [pulsar-io-3827-8:ConnectionPool] - [[id: 
0xadf30373, L:/127.0.0.1:54096 ! R:localhost/127.0.0.1:39047]] Connection 
handshake failed: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed
   2025-04-23T17:24:53,943 - WARN  - [pulsar-io-3827-8:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Error connecting to 
broker: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed
   2025-04-23T17:24:53,943 - WARN  - [pulsar-io-3827-8:ConnectionHandler] - 
[persistent://pulsar/localhost:46767/healthcheck] [null] Could not get 
connection to broker: 
org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed -- Will try again in 46.49 s
   2025-04-23T17:24:54,177 - WARN  - 
[pulsar-3826-1:ServiceUnitStateChannelImpl] - [localhost:46767] Skip 
scheduleCleanup because the state is Closed now
   2025-04-23T17:24:57,346 - INFO  - [main:AbstractConnector] - Stopped 
ServerConnector@7cea35f3{HTTP/1.1, (http/1.1)}{0.0.0.0:0}
   2025-04-23T17:24:57,346 - INFO  - [main:session] - node0 Stopped scavenging
   
   
   ```
   We still retry here.
   org.apache.pulsar.client.api.PulsarClientException$AlreadyClosedException: 
Connection already closed -- Will try again in 5.125 s
   


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