domain: use the KV timeout read feature to mitigate the slow meta reg…

…ion issue (#48125) (#50623) close #48124
pingcap · Jan 24, 2024 · 83df900 · 83df900
1 parent 8aa2293
commit 83df900
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/pkg/domain/domain.go b/pkg/domain/domain.go
@@ -226,6 +226,9 @@ func (do *Domain) loadInfoSchema(startTS uint64) (infoschema.InfoSchema, bool, i
 		infoschema_metrics.LoadSchemaDurationTotal.Observe(time.Since(beginTime).Seconds())
 	}()
 	snapshot := do.store.GetSnapshot(kv.NewVersion(startTS))
+	// Using the KV timeout read feature to address the issue of potential DDL lease expiration when
+	// the meta region leader is slow.
+	snapshot.SetOption(kv.TiKVClientReadTimeout, uint64(3000)) // 3000ms.
 	m := meta.NewSnapshotMeta(snapshot)
 	neededSchemaVersion, err := m.GetSchemaVersionWithNonEmptyDiff()
 	if err != nil {