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fix: snapshotter's failure is not propogated (backport #16588) (#16603)
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Co-authored-by: yihuang <huang@crypto.com>
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mergify[bot] and yihuang authored Jun 19, 2023
1 parent de4e55d commit 40c4daf
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -44,6 +44,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
### Bug Fixes

* (x/auth) [#16554](https://github.com/cosmos/cosmos-sdk/pull/16554) `ModuleAccount.Validate` now reports a nil `.BaseAccount` instead of panicking.
* [#16588](https://github.com/cosmos/cosmos-sdk/pull/16588) Propogate the Snapshotter's failure to the caller, (it will create a empty snapshot silently before).

## [v0.47.3](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.47.3) - 2023-06-08

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8 changes: 5 additions & 3 deletions snapshots/chunk.go
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Expand Up @@ -58,11 +58,13 @@ func (w *ChunkWriter) Close() error {
// CloseWithError closes the writer and sends an error to the reader.
func (w *ChunkWriter) CloseWithError(err error) {
if !w.closed {
if w.pipe == nil {
// create a dummy pipe just to propagate the error to the reader, it always returns nil
_ = w.chunk()
}
w.closed = true
close(w.ch)
if w.pipe != nil {
_ = w.pipe.CloseWithError(err) // CloseWithError always returns nil
}
_ = w.pipe.CloseWithError(err) // CloseWithError always returns nil
}
}

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32 changes: 32 additions & 0 deletions snapshots/helpers_test.go
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Expand Up @@ -171,6 +171,38 @@ func (m *mockSnapshotter) SetSnapshotInterval(snapshotInterval uint64) {
m.snapshotInterval = snapshotInterval
}

type mockErrorSnapshotter struct{}

var _ snapshottypes.Snapshotter = (*mockErrorSnapshotter)(nil)

func (m *mockErrorSnapshotter) Snapshot(height uint64, protoWriter protoio.Writer) error {
return errors.New("mock snapshot error")
}

func (m *mockErrorSnapshotter) Restore(
height uint64, format uint32, protoReader protoio.Reader,
) (snapshottypes.SnapshotItem, error) {
return snapshottypes.SnapshotItem{}, errors.New("mock restore error")
}

func (m *mockErrorSnapshotter) SnapshotFormat() uint32 {
return snapshottypes.CurrentFormat
}

func (m *mockErrorSnapshotter) SupportedFormats() []uint32 {
return []uint32{snapshottypes.CurrentFormat}
}

func (m *mockErrorSnapshotter) PruneSnapshotHeight(height int64) {
}

func (m *mockErrorSnapshotter) GetSnapshotInterval() uint64 {
return 0
}

func (m *mockErrorSnapshotter) SetSnapshotInterval(snapshotInterval uint64) {
}

// setupBusyManager creates a manager with an empty store that is busy creating a snapshot at height 1.
// The snapshot will complete when the returned closer is called.
func setupBusyManager(t *testing.T) *snapshots.Manager {
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12 changes: 12 additions & 0 deletions snapshots/manager_test.go
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Expand Up @@ -4,12 +4,14 @@ import (
"errors"
"testing"

db "github.com/cometbft/cometbft-db"
"github.com/cometbft/cometbft/libs/log"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"

"github.com/cosmos/cosmos-sdk/snapshots"
"github.com/cosmos/cosmos-sdk/snapshots/types"
"github.com/cosmos/cosmos-sdk/testutil"
)

var opts = types.NewSnapshotOptions(1500, 2)
Expand Down Expand Up @@ -243,3 +245,13 @@ func TestManager_Restore(t *testing.T) {
})
require.NoError(t, err)
}

func TestManager_TakeError(t *testing.T) {
snapshotter := &mockErrorSnapshotter{}
store, err := snapshots.NewStore(db.NewMemDB(), testutil.GetTempDir(t))
require.NoError(t, err)
manager := snapshots.NewManager(store, opts, snapshotter, nil, log.NewNopLogger())

_, err = manager.Create(1)
require.Error(t, err)
}

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