forked from pingcap/tidb
/
error.go
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/
error.go
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// Copyright 2016 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package tikv
import (
"github.com/juju/errors"
)
var (
// errInnerRetryable if caller can retry this directly then return this error.
errInnerRetryable = errors.New("try again innerly")
// errInvalidResponse represents response message is invalid.
errInvalidResponse = errors.New("invalid response")
// errBodyMissing response body is missing error
errBodyMissing = errors.New("response body is missing")
)
// TiDB decides whether to retry transaction by checking if error message contains
// string "try again later" literally.
// In TiClient we use `errors.Annotate(err, txnRetryableMark)` to direct TiDB to
// restart a transaction.
// Note that it should be only used if i) the error occurs inside a transaction
// and ii) the error is not totally unexpected and hopefully will recover soon.
const txnRetryableMark = "[try again later]"