Panic happens when opening a boltdb #705
Description
I'm not sure whether this is an issue, but it's confusing.
In my scenario, when containerd service was running, the host powered off. Next time host started, then containerd started, panic happened when containerd was trying to open the meta.db.
panic: assertion failed: Page expected to be: 3393, but self identifies as 6868074383292906018
goroutine 31 [running]:
go.etcd.io/bbolt._assert(...)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/db.go:1359
go.etcd.io/bbolt.(*page).fastCheck(0x7f8a70d41000, 0xd41)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/page.go:57 +0x1df
go.etcd.io/bbolt.(*Tx).page(0xc000372fa0?, 0x5625f8aea50b?)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/tx.go:534 +0x8a
go.etcd.io/bbolt.(*Tx).forEachPageInternal(0x0?, {0xc000120460?, 0x1, 0xa}, 0xc000373078)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/tx.go:546 +0x65
go.etcd.io/bbolt.(*Tx).forEachPage(...)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/tx.go:542
go.etcd.io/bbolt.(*Tx).checkBucket(0xc00027a0e0, 0xc00027a0f8, 0xc000373240, 0xc000373210, {0x5625fa6f2ba0?, 0x5625fb4ab008}, 0xc000064b40)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/tx_check.go:83 +0x126
go.etcd.io/bbolt.(*DB).freepages(0x5625f9de40bb?)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/db.go:1181 +0x229
go.etcd.io/bbolt.(*DB).loadFreelist.func1()
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/db.go:412 +0xc5
sync.(*Once).doSlow(0xc000164888?, 0x10?)
/usr/local/go/src/sync/once.go:74 +0xc2
sync.(*Once).Do(...)
/usr/local/go/src/sync/once.go:65
go.etcd.io/bbolt.(*DB).loadFreelist(0xc0001646c0?)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/db.go:408 +0x47
go.etcd.io/bbolt.Open({0xc000026f80, 0x31}, 0xf9de3628?, 0xc0004a1628)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/vendor/go.etcd.io/bbolt/db.go:290 +0x40c
github.com/containerd/containerd/metadata/plugin.init.1.func1(0xc000128380)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/metadata/plugin/plugin.go:159 +0x78c
github.com/containerd/containerd/plugin.(*Registration).Init(0xc0000d2a80, 0xc000128380)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/plugin/plugin.go:127 +0x2e
github.com/containerd/containerd/services/server.New({0x5625fa6fc9e0, 0xc000666230}, 0xc000614700)
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/services/server/server.go:236 +0x13f8
github.com/containerd/containerd/cmd/containerd/command.App.func1.1()
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/cmd/containerd/command/main.go:194 +0x87
created by github.com/containerd/containerd/cmd/containerd/command.App.func1
/root/rpmbuild/BUILD/containerd.io-1.7.6/_build/src/github.com/containerd/containerd/cmd/containerd/command/main.go:191 +0x8acI can provide the meta.db if possible.