/
xa.go
263 lines (233 loc) · 7.54 KB
/
xa.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/*
* NeoDB
*
* Copyright 2018 The Radon Authors.
* Copyright 2021-2030 The NeoDB Authors.
* Code is licensed under the GPLv3.
*
*/
package backend
import (
"fmt"
"time"
"github.com/sealdb/neodb/xcontext"
"github.com/sealdb/mysqlstack/sqldb"
"golang.org/x/sync/errgroup"
)
var (
txnCounterXaStart = "#xa.start"
txnCounterXaStartError = "#xa.start.error"
txnCounterXaEnd = "#xa.end"
txnCounterXaEndError = "#xa.end.error"
txnCounterXaPrepare = "#xa.prepare"
txnCounterXaPrepareError = "#xa.prepare.error"
txnCounterXaCommit = "#xa.commit"
txnCounterXaCommitError = "#xa.commit.error"
txnCounterXaRollback = "#xa.rollback"
txnCounterXaRollbackError = "#xa.rollback.error"
)
var (
xaMaxRetryNum = 10
)
type txnXAState int32
const (
txnXAStateNone txnXAState = iota
txnXAStateStart
txnXAStateStartFinished
txnXAStateEnd
txnXAStateEndFinished
txnXAStatePrepare
txnXAStatePrepareFinished
txnXAStateCommit
txnXAStateCommitFinished
txnXAStateRollback
txnXAStateRollbackFinished
txnXAStateRecover
txnXAStateRecoverFinished
)
// executeXACommand used to execute XA statements.
func (txn *Txn) executeXACommand(query string, state txnXAState) error {
rctx := &xcontext.RequestContext{
RawQuery: query,
Mode: txn.req.Mode,
Querys: txn.req.Querys,
}
return txn.executeXA(rctx, state)
}
// executeXA only used to execute the 'XA START','XA END', 'XA PREPARE', 'XA COMMIT'/'XA ROLLBACK' statements.
func (txn *Txn) executeXA(req *xcontext.RequestContext, state txnXAState) error {
var eg errgroup.Group
log := txn.log
txn.state.Set(int32(txnStateExecutingTwoPC))
defer queryStats.Record("txn.2pc.execute", time.Now())
oneShard := func(state txnXAState, back string, txn *Txn, query string) error {
var x error
var c Connection
switch state {
case txnXAStateStart, txnXAStateEnd, txnXAStatePrepare:
if c, x = txn.twopcConnection(back); x != nil {
log.Error("txn.xa.fetch.connection.state[%v].on[%s].query[%v].error:%+v", state, back, query, x)
} else {
log.Debug("conn[%v].txn.sessid[%v].xa.execute[%v]", c.ID(), txn.sessionID, query)
if _, x = c.Execute(query); x != nil {
log.Error("txn.xa.execute[%v].on[%v].error:%+v", query, c.Address(), x)
}
}
case txnXAStateCommit, txnXAStateRollback:
maxRetry := xaMaxRetryNum
for retry := 0; retry < maxRetry; retry++ {
if retry == 0 {
if c, x = txn.twopcConnection(back); x != nil {
log.Error("txn.xa.twopc.connection[maxretry:%v, retried:%v].state[%v].on[%s].query[%v].error:%+v", maxRetry, retry, state, back, query, x)
continue
}
} else {
// Retry the connection for commit/rollback.
if c, x = txn.reFetchTwopcConnection(back); x != nil {
log.Error("txn.xa.fetch.connection[maxretry:%v, retried:%v].state[%v].on[%s].query[%v].error:%+v", maxRetry, retry, state, back, query, x)
time.Sleep(time.Second * time.Duration(retry))
continue
}
}
log.Debug("conn[%v].txn.sessid[%v].xa.execute[%v]", c.ID(), txn.sessionID, query)
if _, x = c.Execute(query); x != nil {
log.Error("txn.xa.execute[maxretry:%v, retried:%v].state[%v].on[%v].query[%v].error[%T]:%+v", maxRetry, retry, state, c.Address(), query, x, x)
if sqlErr, ok := x.(*sqldb.SQLError); ok {
// XAE04:
// https://dev.mysql.com/doc/refman/5.5/en/error-messages-server.html#error_er_xaer_nota
// Error: 1397 SQLSTATE: XAE04 (ER_XAER_NOTA)
// Message: XAER_NOTA: Unknown XID
if sqlErr.Num == 1397 {
log.Error("txn.xa.[%v].XAE04.error....", state)
break
}
}
time.Sleep(time.Second * time.Duration(retry))
continue
}
break
}
}
return x
}
switch req.Mode {
case xcontext.ReqNormal:
backends := make(map[string]bool)
for _, query := range req.Querys {
_, ok := backends[query.Backend]
if !ok {
backends[query.Backend] = true
}
}
// Only do XA when Querys's backends numbers larger than one.
beLen := len(backends)
if beLen > 1 {
switch state {
case txnXAStateCommit, txnXAStateRollback:
// Acquire the commit lock if the txn is write.
txn.mgr.CommitLock()
defer txn.mgr.CommitUnlock()
}
for b := range backends {
back := b
eg.Go(func() error {
return oneShard(state, back, txn, req.RawQuery)
})
}
}
case xcontext.ReqScatter:
backends := txn.backends
switch state {
case txnXAStateCommit, txnXAStateRollback:
// Acquire the commit lock when the txn commit/rollback
txn.mgr.CommitLock()
defer txn.mgr.CommitUnlock()
}
for b := range backends {
back := b
eg.Go(func() error {
return oneShard(state, back, txn, req.RawQuery)
})
}
}
return eg.Wait()
}
func (txn *Txn) xaStart() error {
log := txn.log
txnCounters.Add(txnCounterXaStart, 1)
txn.xaState.Set(int32(txnXAStateStart))
defer func() { txn.xaState.Set(int32(txnXAStateStartFinished)) }()
if txn.isMultiStmtTxn {
txn.xid = fmt.Sprintf("MULTRXID-%v-%v", time.Now().Format("20060102150405"), txn.id)
} else {
txn.xid = fmt.Sprintf("RXID-%v-%v", time.Now().Format("20060102150405"), txn.id)
}
start := fmt.Sprintf("XA START '%v'", txn.xid)
if err := txn.executeXACommand(start, txnXAStateStart); err != nil {
log.Error("xa.start[%v].error:%v", start, err)
txnCounters.Add(txnCounterXaStartError, 1)
txn.incErrors()
return err
}
return nil
}
func (txn *Txn) xaEnd() error {
log := txn.log
txnCounters.Add(txnCounterXaEnd, 1)
txn.xaState.Set(int32(txnXAStateEnd))
defer func() { txn.xaState.Set(int32(txnXAStateEndFinished)) }()
end := fmt.Sprintf("XA END '%v'", txn.xid)
if err := txn.executeXACommand(end, txnXAStateEnd); err != nil {
log.Error("xa.end[%v].error:%v", end, err)
txnCounters.Add(txnCounterXaEndError, 1)
txn.incErrors()
return err
}
return nil
}
func (txn *Txn) xaPrepare() error {
log := txn.log
txnCounters.Add(txnCounterXaPrepare, 1)
txn.xaState.Set(int32(txnXAStatePrepare))
defer func() { txn.xaState.Set(int32(txnXAStatePrepareFinished)) }()
prepare := fmt.Sprintf("XA PREPARE '%v'", txn.xid)
if err := txn.executeXACommand(prepare, txnXAStatePrepare); err != nil {
log.Error("xa.prepare[%v].error:%v", prepare, err)
txnCounters.Add(txnCounterXaPrepareError, 1)
txn.incErrors()
return err
}
return nil
}
func (txn *Txn) xaCommit() {
log := txn.log
txnCounters.Add(txnCounterXaCommit, 1)
txn.xaState.Set(int32(txnXAStateCommit))
// if the commit is failed, the status is set txnXAStateCommitFinished which is not used.
// If need, more states will be added.
defer func() { txn.xaState.Set(int32(txnXAStateCommitFinished)) }()
commit := fmt.Sprintf("XA COMMIT '%v'", txn.xid)
if err := txn.executeXACommand(commit, txnXAStateCommit); err != nil {
log.Error("xa.commit[%v].error:%v", commit, err)
txn.incErrors()
txnCounters.Add(txnCounterXaCommitError, 1)
if err := txn.WriteXaCommitErrLog(txnXACommitErrStateCommit); err != nil {
log.Error("txn.xa.WriteXaCommitErrLog.query[%v].error[%T]:%+v", commit, err, err)
}
}
}
func (txn *Txn) xaRollback() {
log := txn.log
txnCounters.Add(txnCounterXaRollback, 1)
txn.xaState.Set(int32(txnXAStateRollback))
defer func() { txn.xaState.Set(int32(txnXAStateRollbackFinished)) }()
rollback := fmt.Sprintf("XA ROLLBACK '%v'", txn.xid)
if err := txn.executeXACommand(rollback, txnXAStateRollback); err != nil {
log.Error("xa.rollback[%v].error:%v", rollback, err)
txnCounters.Add(txnCounterXaRollbackError, 1)
txn.incErrors()
if err := txn.WriteXaCommitErrLog(txnXACommitErrStateRollback); err != nil {
log.Error("txn.xa.WriteXaCommitErrLog.query[%v].error[%T]:%+v", rollback, err, err)
}
}
}