ninsmiracle commented on issue #2114:
URL:
https://github.com/apache/incubator-pegasus/issues/2114#issuecomment-2345197032
When I check the app status:
```
[replicas]
pidx ballot replica_count primary secondaries
0 0 0/3 - []
1 0 0/3 - []
2 0 0/3 - []
3 0 0/3 - []
```
We can see that even the primary is not successfully established. So I check
the log of replica server for this replica:
```
D2024-09-11 15:32:08.284 (1726039928284328485 93977) replica.io-thrd.93977:
server_negotiation.cpp:40:start():
SERVER_NEGOTIATION(CLIENT=10.xxx.xx.1:41689): start negotiation
D2024-09-11 15:32:08.284 (1726039928284356416 93977) replica.io-thrd.93977:
network.cpp:696:on_server_session_accepted(): server session accepted,
remote_client = 10.xxx.xx.1:41689, current_count = 1
D2024-09-11 15:32:08.284 (1726039928284364187 93977) replica.io-thrd.93977:
network.cpp:701:on_server_session_accepted(): ip session inserted,
remote_client = 10.xxx.xx.1:41689, current_count = 1
W2024-09-11 15:32:08.289 (1726039928289020684 93993)
replica.default10.04006f170001004b: server_negotiation.cpp:137:do_challenge():
SERVER_NEGOTIATION(CLIENT=10.xxx.xx.1:41689): negotiation failed, with err =
ERR_UNKNOWN, msg = ERR_UNKNOWN
D2024-09-11 15:32:08.289 (1726039928289039571 93993)
replica.default10.04006f170001004b:
network.cpp:738:on_server_session_disconnected(): session 10.xxx.xx1:41689
disconnected, the total client sessions count remains 0
D2024-09-11 15:32:08.289 (1726039928289046389 93993)
replica.default10.04006f170001004b:
network.cpp:744:on_server_session_disconnected(): client ip 10.xxx.xx.1:41689
has no more session to this server
E2024-09-11 15:32:08.289 (1726039928289069504 93975) replica.io-thrd.93975:
asio_rpc_session.cpp:96:operator()(): asio read from 10.xxx.xx.1:41689 failed:
Operation canceled
```
I think the key message is `server_negotiation.cpp:137:do_challenge():
SERVER_NEGOTIATION(CLIENT=10.xxx.xx.1:41689): negotiation failed, with err =
ERR_UNKNOWN, msg = ERR_UNKNOWN`
In my opinion, it failed on `SASL_INITIATE` step of SASL process between
meta server and replica server.
```
client server
| --- SASL_LIST_MECHANISMS --> |
| <-- SASL_LIST_MECHANISMS_RESP --- |
| -- SASL_SELECT_MECHANISMS --> |
| <-- SASL_SELECT_MECHANISMS_RESP --- |
| |
| --- SASL_INITIATE --> |
| |
| <-- SASL_CHALLENGE --- |
| --- SASL_CHALLENGE_RESP --> |
| |
| ..... |
| |
| <-- SASL_CHALLENGE --- |
| --- SASL_CHALLENGE_RESP --> |
| |
| |
| <-- SASL_SUCC --- |
| |
| |
| --- RPC_CALL ---> |
| <-- RPC_RESP ---- |
```
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