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batcheval: add
PushTxnResponse.AmbiguousAbort
This indicates to the caller that the `ABORTED` status of the pushed transaction is ambiguous, and the transaction may in fact have been committed and GCed already. This information is also plumbed through the `IntentResolver` txn push APIs. Epic: none Release note: None
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| // Copyright 2024 The Cockroach Authors. | ||
| // | ||
| // Use of this software is governed by the Business Source License | ||
| // included in the file licenses/BSL.txt. | ||
| // | ||
| // As of the Change Date specified in that file, in accordance with | ||
| // the Business Source License, use of this software will be governed | ||
| // by the Apache License, Version 2.0, included in the file | ||
| // licenses/APL.txt. | ||
|
|
||
| package batcheval_test | ||
|
|
||
| import ( | ||
| "context" | ||
| "testing" | ||
|
|
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| "github.com/cockroachdb/cockroach/pkg/kv/kvpb" | ||
| "github.com/cockroachdb/cockroach/pkg/kv/kvserver/batcheval" | ||
| "github.com/cockroachdb/cockroach/pkg/kv/kvserver/batcheval/result" | ||
| "github.com/cockroachdb/cockroach/pkg/roachpb" | ||
| "github.com/cockroachdb/cockroach/pkg/storage" | ||
| "github.com/cockroachdb/cockroach/pkg/storage/enginepb" | ||
| "github.com/cockroachdb/cockroach/pkg/testutils" | ||
| "github.com/cockroachdb/cockroach/pkg/util/hlc" | ||
| "github.com/cockroachdb/cockroach/pkg/util/leaktest" | ||
| "github.com/cockroachdb/cockroach/pkg/util/log" | ||
| "github.com/cockroachdb/cockroach/pkg/util/timeutil" | ||
| "github.com/cockroachdb/cockroach/pkg/util/uuid" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
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| // TestPushTxnAmbiguousAbort tests PushTxn behavior when the transaction record | ||
| // is missing. In this case, the timestamp cache can tell us whether the | ||
| // transaction record may have existed in the past -- if we know it hasn't, then | ||
| // the transaction is still pending (e.g. before the record is written), but | ||
| // otherwise the transaction record is pessimistically assumed to have aborted. | ||
| // However, this state is ambiguous, as the transaction may in fact have | ||
| // committed already and GCed its transaction record. Make sure this is | ||
| // reflected in the AmbiguousAbort field. | ||
| // | ||
| // TODO(erikgrinaker): generalize this to test PushTxn more broadly. | ||
| func TestPushTxnAmbiguousAbort(t *testing.T) { | ||
| defer leaktest.AfterTest(t)() | ||
| defer log.Scope(t).Close(t) | ||
|
|
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| ctx := context.Background() | ||
|
|
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| clock := hlc.NewClockForTesting(timeutil.NewManualTime(timeutil.Now())) | ||
| now := clock.Now() | ||
| engine := storage.NewDefaultInMemForTesting() | ||
| defer engine.Close() | ||
|
|
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| testutils.RunTrueAndFalse(t, "CanCreateTxnRecord", func(t *testing.T, canCreateTxnRecord bool) { | ||
| evalCtx := (&batcheval.MockEvalCtx{ | ||
| Clock: clock, | ||
| CanCreateTxnRecordFn: func() (bool, kvpb.TransactionAbortedReason) { | ||
| return canCreateTxnRecord, 0 // PushTxn doesn't care about the reason | ||
| }, | ||
| }).EvalContext() | ||
|
|
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| key := roachpb.Key("foo") | ||
| pusheeTxnMeta := enginepb.TxnMeta{ | ||
| ID: uuid.MakeV4(), | ||
| Key: key, | ||
| MinTimestamp: now, | ||
| } | ||
|
|
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| resp := kvpb.PushTxnResponse{} | ||
| res, err := batcheval.PushTxn(ctx, engine, batcheval.CommandArgs{ | ||
| EvalCtx: evalCtx, | ||
| Header: kvpb.Header{ | ||
| Timestamp: clock.Now(), | ||
| }, | ||
| Args: &kvpb.PushTxnRequest{ | ||
| RequestHeader: kvpb.RequestHeader{Key: key}, | ||
| PusheeTxn: pusheeTxnMeta, | ||
| }, | ||
| }, &resp) | ||
| require.NoError(t, err) | ||
|
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| // There is no txn record (the engine is empty). If we can't create a txn | ||
| // record, it's because the timestamp cache can't confirm that it didn't | ||
| // exist in the past. This will return an ambiguous abort. | ||
| var expectUpdatedTxns []*roachpb.Transaction | ||
| expectTxn := roachpb.Transaction{ | ||
| TxnMeta: pusheeTxnMeta, | ||
| LastHeartbeat: pusheeTxnMeta.MinTimestamp, | ||
| } | ||
| if !canCreateTxnRecord { | ||
| expectTxn.Status = roachpb.ABORTED | ||
| expectUpdatedTxns = append(expectUpdatedTxns, &expectTxn) | ||
| } | ||
|
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||
| require.Equal(t, result.Result{ | ||
| Local: result.LocalResult{ | ||
| UpdatedTxns: expectUpdatedTxns, | ||
| }, | ||
| }, res) | ||
| require.Equal(t, kvpb.PushTxnResponse{ | ||
| PusheeTxn: expectTxn, | ||
| AmbiguousAbort: !canCreateTxnRecord, | ||
| }, resp) | ||
| }) | ||
| } |
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