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84c8ab9fd1
gitea.com experienced the corrupted LevelQueue bug again.
I think the problem is clear now: if the keys in LevelDB went
out-of-sync, the LevelQueue itself doesn't have the ability to recover,
eg:
* LevelQueue.Len() reports 100
* LevelQueue.LPop() reports ErrNotFound = errors.New("no key found")
So it needs to dive into the LevelDB to remove all keys to recover the
corrupted LevelQueue.
More comments are in TestCorruptedLevelQueue.
48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package lqinternal
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import (
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"bytes"
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"encoding/binary"
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"github.com/syndtr/goleveldb/leveldb"
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"github.com/syndtr/goleveldb/leveldb/opt"
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)
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func QueueItemIDBytes(id int64) []byte {
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buf := make([]byte, 8)
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binary.PutVarint(buf, id)
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return buf
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}
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func QueueItemKeyBytes(prefix []byte, id int64) []byte {
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key := make([]byte, len(prefix), len(prefix)+1+8)
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copy(key, prefix)
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key = append(key, '-')
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return append(key, QueueItemIDBytes(id)...)
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}
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func RemoveLevelQueueKeys(db *leveldb.DB, namePrefix []byte) {
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keyPrefix := make([]byte, len(namePrefix)+1)
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copy(keyPrefix, namePrefix)
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keyPrefix[len(namePrefix)] = '-'
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it := db.NewIterator(nil, &opt.ReadOptions{Strict: opt.NoStrict})
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defer it.Release()
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for it.Next() {
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if bytes.HasPrefix(it.Key(), keyPrefix) {
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_ = db.Delete(it.Key(), nil)
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}
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}
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}
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func ListLevelQueueKeys(db *leveldb.DB) (res [][]byte) {
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it := db.NewIterator(nil, &opt.ReadOptions{Strict: opt.NoStrict})
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defer it.Release()
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for it.Next() {
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res = append(res, it.Key())
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}
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return res
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}
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