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allegro / bigcache

Efficient cache for gigabytes of data written in Go.
http://allegro.tech/2016/03/writing-fast-cache-service-in-go.html
Apache License 2.0
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A panic occurred, causing the lock to remain engaged.panic: makeslice: len out of range #401

Open zzdeys opened 1 month ago

zzdeys commented 1 month ago

What is the issue you are having? A panic occurred, causing the lock to remain engaged. Even if I use recover from the panic, the program cannot continue running because the lock is not released. When other goroutines try to use bigcache, they cannot acquire the lock and will wait indefinitely.

traces:
/data/bkdevops/apps/golang/1.18/src/runtime/panic-go: 838 +0x207
github.com/allegro/bigcache/v2.readEntry(...)
/root/go/pkg/mod/github.com/allegro/bigcache/v2@v2.2.5/encoding-go:51
github. com/allegro/bigcache/v2. (*BigCache). providedOnRemoveWithReason(0xc55c947450, (0xc6b528cbbc, 0x34, 0X1145444}, 0x1)
/root/go/pkg/mod/github.com/allegro/bigcache/v2@v2.2.5/bigcache.go:229 +0x1ae
github.com/allegro/bigcache/v2. (*cacheShard). remove0ldestEntry(0xc5ae07e360, 0x2c73c338?)
/root/go/pkg/mod/github.com/allegro/bigcache/v2@v2.2.5/shard-go:324 +0xc9
github.com/allegro/bigcache/v2. (*cacheShard).onEvict(0x1186180?, {0xcbb528cbbc?,
0x27a5bcd3a24d8539?, 0x0?}, x0?, 0xc53c1f73e0?)
/root/go/pkg/mod/github.com/allegro/bigcache/v2@v2.2.5/shard.go:271 +0x3f
github.com/allegro/bigcache/v2. (*cacheShard).set(0xc5ae07e360, {0xcb043126c0, 0x5a}, 0x27a5bcd3a24d8539, {0xc48f9e53c8, 0x20, 0xc48f9
e53c8?})
/root/go/pkg/mod/github.com/allegro/bigcache/v2@v2.2.5/shard.go:132 +0x178
github.com/allegro/bigcache/v2. (*BigCache).Set(0xc55c947450, {0xcb043126c0, 0x5a}, {0xc48f9e53c8, 0x20, 0x20})
/root/go/pkg/mod/github.com/allegro/bigcache/v2@v2.2.5/bigcache.go:133 +0x8d

bigcache config:

Shards:             512,             
LifeWindow:         60 * time.Minute,
CleanWindow:        time.Second * 60, 
MaxEntriesInWindow: 1000 * 10 * 60,
MaxEntrySize:       4096,
Verbose:            false,
HardMaxCacheSize:   64 * 1024,

other info: i put key to bigcache 50000/min 60000 keys in bigcache

What is BigCache doing that it shouldn't?

Minimal, Complete, and Verifiable Example

i cant provide minimal,because I cannt reliably reproduce this problem. It occurs randomly within 2 to 48 hours after the program starts.

Environment: