| ENOSERVICE | 1001 | No | Can't locate the service, hardly happening and usually being ENOMETHOD instead | |
| ENOMETHOD | 1002 | No | Can't locate the method. | Misc forms, common ones are "Fail to find method=…" |
| EREQUEST | 1003 | No | fail to serialize the request, may be set on either client-side or server-side | Misc forms: "Missing required fields in request: …" "Fail to parse request message, …" "Bad request" |
| ETOOMANYFAILS | 1005 | No | Too many sub-channel failures inside a ParallelChannel | "%d/%d channels failed, fail_limit=%d" |
| EBACKUPREQUEST | 1007 | Yes | Set when backup requests are triggered. Not returned by ErrorCode() directly, viewable from spans in /rpcz | "reached backup timeout=%dms" |
| EFAILEDSOCKET | 1009 | Yes | The connection is broken during RPC | "The socket was SetFailed" |
| EHTTP | 1010 | No | HTTP responses with non 2xx status code are treated as failure and set with this code. No retry by default, changeable by customizing RetryPolicy. | Bad http call |
| EOVERCROWDED | 1011 | Yes | Too many messages to buffer at the sender side. Usually caused by lots of concurrent asynchronous requests. Modifiable by `-socket_max_unwritten_bytes`, 8MB by default. | The server is overcrowded |
| EINTERNAL | 2001 | No | The default error for `Controller::SetFailed` without specifying a one. | Internal Server Error |
| ERESPONSE | 2002 | No | fail to serialize the response, may be set on either client-side or server-side | Misc forms: "Missing required fields in response: …" "Fail to parse response message, " "Bad response" |
| ELOGOFF | 2003 | Yes | Server has been stopped | "Server is going to quit" |
| ELIMIT | 2004 | Yes | Number of requests being processed concurrently exceeds `ServerOptions.max_concurrency` | "Reached server's limit=%d on concurrent requests" |
| EHOSTDOWN | 112 | Yes | No available server to send request. The servers may be stopped or stopping(returning ELOGOFF). | "Fail to select server from …" "Not connected to … yet" |
| ENOSERVICE | 1001 | No | Can't locate the service, hardly happening and usually being ENOMETHOD instead | |
| ENOMETHOD | 1002 | No | Can't locate the method. | Misc forms, common ones are "Fail to find method=…" |
| EREQUEST | 1003 | No | fail to serialize the request, may be set on either client-side or server-side | Misc forms: "Missing required fields in request: …" "Fail to parse request message, …" "Bad request" |
| ETOOMANYFAILS | 1005 | No | Too many sub-channel failures inside a ParallelChannel | "%d/%d channels failed, fail_limit=%d" |
| EBACKUPREQUEST | 1007 | Yes | Set when backup requests are triggered. Not returned by ErrorCode() directly, viewable from spans in /rpcz | "reached backup timeout=%dms" |
| EFAILEDSOCKET | 1009 | Yes | The connection is broken during RPC | "The socket was SetFailed" |
| EHTTP | 1010 | No | HTTP responses with non 2xx status code are treated as failure and set with this code. No retry by default, changeable by customizing RetryPolicy. | Bad http call |
| EOVERCROWDED | 1011 | Yes | Too many messages to buffer at the sender side. Usually caused by lots of concurrent asynchronous requests. Modifiable by `-socket_max_unwritten_bytes`, 8MB by default. | The server is overcrowded |
| EINTERNAL | 2001 | No | The default error for `Controller::SetFailed` without specifying a one. | Internal Server Error |
| ERESPONSE | 2002 | No | fail to serialize the response, may be set on either client-side or server-side | Misc forms: "Missing required fields in response: …" "Fail to parse response message, " "Bad response" |
| ELOGOFF | 2003 | Yes | Server has been stopped | "Server is going to quit" |
| ELIMIT | 2004 | Yes | Number of requests being processed concurrently exceeds `ServerOptions.max_concurrency` | "Reached server's limit=%d on concurrent requests" |
