TCGOGOGO opened a new issue, #155:
URL: https://github.com/apache/pulsar-client-python/issues/155
## Descripition
The connection between client and server may be broken in some cases, for
example, network fluctuations, so I was trying to have a retry logic when
producer send messages, when I close the network connection forcely I get some
logs like:
```
2023-10-07 17:06:20.322 ERROR [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:1234 | [src:58348
-> dest:32006] Connection closed with ConnectError
2023-10-07 17:06:20.323 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:147 |
[persistent://public/default/test-p-partition-1, test] Schedule reconnection in
0.1 s
2023-10-07 17:06:20.323 ERROR [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:1234 | [src:58345
-> dest:32006] Connection closed with ConnectError
2023-10-07 17:06:20.323 ERROR [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:1234 | [src:58346
-> dest:32006] Connection closed with ConnectError
2023-10-07 17:06:20.323 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:147 |
[persistent://public/default/test-p-partition-2, test] Schedule reconnection in
0.1 s
2023-10-07 17:06:20.324 ERROR [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:1234 | [src:58347
-> dest:32006] Connection closed with ConnectError
2023-10-07 17:06:20.324 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:147 |
[persistent://public/default/test-p-partition-0, test] Schedule reconnection in
0.1 s
2023-10-07 17:06:20.324 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:147 |
[persistent://public/default/test-p-partition-3, test] Schedule reconnection in
0.1 s
2023-10-07 17:06:20.324 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:263 | [src:58348
-> dest:32006] Destroyed connection
2023-10-07 17:06:20.324 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:263 | [src:58345
-> dest:32006] Destroyed connection
2023-10-07 17:06:20.324 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:263 | [src:58346
-> dest:32006] Destroyed connection
2023-10-07 17:06:20.324 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:263 | [src:58347
-> dest:32006] Destroyed connection
2023-10-07 17:06:20.427 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-1, test] Getting connection from
pool
2023-10-07 17:06:20.427 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:87 | Deleting stale
connection from pool for pulsar://dest:32006 use_count: -1 @ 0000000000000000
2023-10-07 17:06:20.427 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:184 | [<none> ->
pulsar://dest:32006] Create ClientConnection, timeout=3000
2023-10-07 17:06:20.427 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:106 | Created
connection for pulsar://dest:32006
2023-10-07 17:06:20.427 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-2, test] Getting connection from
pool
2023-10-07 17:06:20.427 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-3, test] Getting connection from
pool
2023-10-07 17:06:20.428 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-0, test] Getting connection from
pool
```
and then I saw the reconnction logic but got a lot of failure logs like:
```
2023-10-07 17:06:23.430 ERROR [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:1234 | [<none> ->
pulsar://dest:32006] Connection closed with ConnectError
2023-10-07 17:06:23.430 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:147 |
[persistent://public/default/test-p-partition-1, test] Schedule reconnection in
0.1 s
2023-10-07 17:06:23.430 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:147 |
[persistent://public/default/test-p-partition-2, test] Schedule reconnection in
0.1 s
2023-10-07 17:06:23.430 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:147 |
[persistent://public/default/test-p-partition-3, test] Schedule reconnection in
0.1 s
2023-10-07 17:06:23.430 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:147 |
[persistent://public/default/test-p-partition-0, test] Schedule reconnection in
0.1 s
2023-10-07 17:06:23.430 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:263 | [<none> ->
pulsar://dest:32006] Destroyed connection
2023-10-07 17:06:23.538 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-1, test] Getting connection from
pool
2023-10-07 17:06:23.538 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:87 | Deleting stale
connection from pool for pulsar://dest:32006 use_count: -1 @ 0000000000000000
2023-10-07 17:06:23.538 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:184 | [<none> ->
pulsar://dest:32006] Create ClientConnection, timeout=3000
2023-10-07 17:06:23.539 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:106 | Created
connection for pulsar://dest:32006
2023-10-07 17:06:23.539 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-0, test] Getting connection from
pool
2023-10-07 17:06:23.539 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-2, test] Getting connection from
pool
2023-10-07 17:06:23.540 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-3, test] Getting connection from
pool
2023-10-07 17:06:23.568 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:382 |
[10.10.10.131:58515 -> dest:32006] Connected to broker
2023-10-07 17:06:23.627 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:87 | Deleting stale
connection from pool for
pulsar://brokers-broker-1.brokers-broker-headless.pulsar.svc.cluster.local:6650
use_count: -1 @ 0000000000000000
2023-10-07 17:06:23.627 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:184 | [<none> ->
pulsar://dest:32006] Create ClientConnection, timeout=3000
2023-10-07 17:06:23.627 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:106 | Created
connection for
pulsar://brokers-broker-1.brokers-broker-headless.pulsar.svc.cluster.local:6650
2023-10-07 17:06:23.632 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:87 | Deleting stale
connection from pool for
pulsar://brokers-broker-0.brokers-broker-headless.pulsar.svc.cluster.local:6650
use_count: -1 @ 0000000000000000
2023-10-07 17:06:23.632 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:184 | [<none> ->
pulsar://dest:32006] Create ClientConnection, timeout=3000
2023-10-07 17:06:23.633 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:106 | Created
connection for
pulsar://brokers-broker-0.brokers-broker-headless.pulsar.svc.cluster.local:6650
2023-10-07 17:06:23.633 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:87 | Deleting stale
connection from pool for
pulsar://brokers-broker-2.brokers-broker-headless.pulsar.svc.cluster.local:6650
use_count: -1 @ 0000000000000000
2023-10-07 17:06:23.633 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:184 | [<none> ->
pulsar://dest:32006] Create ClientConnection, timeout=3000
2023-10-07 17:06:23.633 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ConnectionPool:106 | Created
connection for
pulsar://brokers-broker-2.brokers-broker-headless.pulsar.svc.cluster.local:6650
2023-10-07 17:06:23.656 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:384 |
[10.10.10.131:58516 -> dest:32006] Connected to broker through proxy. Logical
broker:
pulsar://brokers-broker-1.brokers-broker-headless.pulsar.svc.cluster.local:6650
2023-10-07 17:06:23.664 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:384 |
[10.10.10.131:58519 -> dest:32006] Connected to broker through proxy. Logical
broker:
pulsar://brokers-broker-2.brokers-broker-headless.pulsar.svc.cluster.local:6650
2023-10-07 17:06:23.673 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:384 |
[10.10.10.131:58518 -> dest:32006] Connected to broker through proxy. Logical
broker:
pulsar://brokers-broker-0.brokers-broker-headless.pulsar.svc.cluster.local:6650
2023-10-07 17:06:23.722 WARN [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ClientConnection:1630 |
[10.10.10.131:58516 -> dest:32006] Received error response from server:
ProducerBusy
(org.apache.pulsar.broker.service.BrokerServiceException$NamingException:
Producer with name 'test' is already connected to topic) -- req_id: 4
2023-10-07 17:06:23.722 WARN [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ProducerImpl:281 |
[persistent://public/default/test-p-partition-1, test] Failed to reconnect
producer: ProducerBusy
```
finally, after a long time reconnection, the client recovery
```
2023-10-07 17:07:12.180 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-1, test] Getting connection from
pool
2023-10-07 17:07:12.196 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-3, test] Getting connection from
pool
2023-10-07 17:07:12.196 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-0, test] Getting connection from
pool
2023-10-07 17:07:12.197 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\HandlerBase:72 |
[persistent://public/default/test-p-partition-2, test] Getting connection from
pool
2023-10-07 17:07:12.237 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ProducerImpl:209 |
[persistent://public/default/test-p-partition-1, test] Created producer on
broker [src:58516 -> dest:32006]
2023-10-07 17:07:12.253 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ProducerImpl:209 |
[persistent://public/default/test-p-partition-3, test] Created producer on
broker [src:58518 -> dest:32006]
2023-10-07 17:07:12.253 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ProducerImpl:209 |
[persistent://public/default/test-p-partition-0, test] Created producer on
broker [src:58518 -> dest:32006]
2023-10-07 17:07:12.256 INFO [49156]
D:\a\pulsar-client-cpp\pulsar-client-cpp\lib\ProducerImpl:209 |
[persistent://public/default/test-p-partition-2, test] Created producer on
broker [src:58519 -> dest:32006]
```
The entire reconntion from first try to final success cost nearly 60
seconds, which seems too long
## Reproduce
### Version
pulsar: 3.1.0.1
pulsar python sdk: 3.3.0
### Step
1. run pulsar server
2. using python client producer to send message, sample code:
```
import time
import pulsar
client = pulsar.Client('pulsar server address',
connection_timeout_ms=3000,
operation_timeout_seconds=3)
producer = client.create_producer(topic='persistent topic name',
send_timeout_millis=1000,
producer_name='test')
def send_message(content):
while True:
try:
print(f'connection: state: {producer.is_connected()}')
msg_id = producer.send(content.encode('utf-8'))
print(msg_id)
time.sleep(5)
break
except Exception as e:
print(e)
while True:
send_message(input())
```
3. input something to make sure the connection is ok
4. close the network connection to the server manully
5. reconnect the network
## Expection
The client reconnection is expected to be more quick and smooth
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