81 lines
2.3 KiB
Go
81 lines
2.3 KiB
Go
// Copyright 2023 PingCAP, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package sqlkiller
|
|
|
|
import (
|
|
"math/rand"
|
|
"sync/atomic"
|
|
|
|
"github.com/pingcap/failpoint"
|
|
"github.com/pingcap/tidb/pkg/util/dbterror/exeerrors"
|
|
"github.com/pingcap/tidb/pkg/util/logutil"
|
|
"go.uber.org/zap"
|
|
)
|
|
|
|
type killSignal = uint32
|
|
|
|
// KillSignal types.
|
|
const (
|
|
UnspecifiedKillSignal killSignal = iota
|
|
QueryInterrupted
|
|
MaxExecTimeExceeded
|
|
QueryMemoryExceeded
|
|
ServerMemoryExceeded
|
|
)
|
|
|
|
// SQLKiller is used to kill a query.
|
|
type SQLKiller struct {
|
|
Signal killSignal
|
|
ConnID uint64
|
|
}
|
|
|
|
// SendKillSignal sends a kill signal to the query.
|
|
func (killer *SQLKiller) SendKillSignal(reason killSignal) {
|
|
atomic.CompareAndSwapUint32(&killer.Signal, 0, reason)
|
|
}
|
|
|
|
// HandleSignal handles the kill signal and return the error.
|
|
func (killer *SQLKiller) HandleSignal() error {
|
|
failpoint.Inject("randomPanic", func(val failpoint.Value) {
|
|
if p, ok := val.(int); ok {
|
|
if rand.Float64() > (float64)(p)/1000 {
|
|
if killer.ConnID != 0 {
|
|
targetStatus := rand.Int31n(5)
|
|
atomic.StoreUint32(&killer.Signal, uint32(targetStatus))
|
|
}
|
|
}
|
|
}
|
|
})
|
|
status := atomic.LoadUint32(&killer.Signal)
|
|
switch status {
|
|
case QueryInterrupted:
|
|
return exeerrors.ErrQueryInterrupted.GenWithStackByArgs()
|
|
case MaxExecTimeExceeded:
|
|
return exeerrors.ErrMaxExecTimeExceeded.GenWithStackByArgs()
|
|
case QueryMemoryExceeded:
|
|
return exeerrors.ErrMemoryExceedForQuery.GenWithStackByArgs(killer.ConnID)
|
|
case ServerMemoryExceeded:
|
|
logutil.BgLogger().Warn("global memory controller, NeedKill signal is received successfully",
|
|
zap.Uint64("conn", killer.ConnID))
|
|
return exeerrors.ErrMemoryExceedForInstance.GenWithStackByArgs(killer.ConnID)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Reset resets the SqlKiller.
|
|
func (killer *SQLKiller) Reset() {
|
|
atomic.StoreUint32(&killer.Signal, 0)
|
|
}
|