Don Newton | 379ae25 | 2019-04-01 12:17:06 -0400 | [diff] [blame^] | 1 | // Copyright (C) MongoDB, Inc. 2017-present. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 4 | // not use this file except in compliance with the License. You may obtain |
| 5 | // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 |
| 6 | |
| 7 | package topology |
| 8 | |
| 9 | import ( |
| 10 | "context" |
| 11 | "net" |
| 12 | |
| 13 | "strings" |
| 14 | |
| 15 | "github.com/mongodb/mongo-go-driver/x/network/command" |
| 16 | "github.com/mongodb/mongo-go-driver/x/network/connection" |
| 17 | "github.com/mongodb/mongo-go-driver/x/network/description" |
| 18 | "github.com/mongodb/mongo-go-driver/x/network/wiremessage" |
| 19 | ) |
| 20 | |
| 21 | // sconn is a wrapper around a connection.Connection. This type is returned by |
| 22 | // a Server so that it can track network errors and when a non-timeout network |
| 23 | // error is returned, the pool on the server can be cleared. |
| 24 | type sconn struct { |
| 25 | connection.Connection |
| 26 | s *Server |
| 27 | id uint64 |
| 28 | } |
| 29 | |
| 30 | var notMasterCodes = []int32{10107, 13435} |
| 31 | var recoveringCodes = []int32{11600, 11602, 13436, 189, 91} |
| 32 | |
| 33 | func (sc *sconn) ReadWireMessage(ctx context.Context) (wiremessage.WireMessage, error) { |
| 34 | wm, err := sc.Connection.ReadWireMessage(ctx) |
| 35 | if err != nil { |
| 36 | sc.processErr(err) |
| 37 | } else { |
| 38 | e := command.DecodeError(wm) |
| 39 | sc.processErr(e) |
| 40 | } |
| 41 | return wm, err |
| 42 | } |
| 43 | |
| 44 | func (sc *sconn) WriteWireMessage(ctx context.Context, wm wiremessage.WireMessage) error { |
| 45 | err := sc.Connection.WriteWireMessage(ctx, wm) |
| 46 | sc.processErr(err) |
| 47 | return err |
| 48 | } |
| 49 | |
| 50 | func (sc *sconn) processErr(err error) { |
| 51 | // TODO(GODRIVER-524) handle the rest of sdam error handling |
| 52 | // Invalidate server description if not master or node recovering error occurs |
| 53 | if cerr, ok := err.(command.Error); ok && (isRecoveringError(cerr) || isNotMasterError(cerr)) { |
| 54 | desc := sc.s.Description() |
| 55 | desc.Kind = description.Unknown |
| 56 | desc.LastError = err |
| 57 | // updates description to unknown |
| 58 | sc.s.updateDescription(desc, false) |
| 59 | } |
| 60 | |
| 61 | ne, ok := err.(connection.NetworkError) |
| 62 | if !ok { |
| 63 | return |
| 64 | } |
| 65 | |
| 66 | if netErr, ok := ne.Wrapped.(net.Error); ok && netErr.Timeout() { |
| 67 | return |
| 68 | } |
| 69 | if ne.Wrapped == context.Canceled || ne.Wrapped == context.DeadlineExceeded { |
| 70 | return |
| 71 | } |
| 72 | |
| 73 | desc := sc.s.Description() |
| 74 | desc.Kind = description.Unknown |
| 75 | desc.LastError = err |
| 76 | // updates description to unknown |
| 77 | sc.s.updateDescription(desc, false) |
| 78 | } |
| 79 | |
| 80 | func isRecoveringError(err command.Error) bool { |
| 81 | for _, c := range recoveringCodes { |
| 82 | if c == err.Code { |
| 83 | return true |
| 84 | } |
| 85 | } |
| 86 | return strings.Contains(err.Error(), "node is recovering") |
| 87 | } |
| 88 | |
| 89 | func isNotMasterError(err command.Error) bool { |
| 90 | for _, c := range notMasterCodes { |
| 91 | if c == err.Code { |
| 92 | return true |
| 93 | } |
| 94 | } |
| 95 | return strings.Contains(err.Error(), "not master") |
| 96 | } |