ddl: fix clean dead table lock panic (pingcap#20198)

Signed-off-by: crazycs520 <[email protected]>
m4ver1k · Sep 24, 2020 · 877d871 · 877d871
1 parent aceecf0
commit 877d871
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/ddl/ddl.go b/ddl/ddl.go
@@ -574,6 +574,9 @@ func (d *ddl) startCleanDeadTableLock() {
 			if !d.ownerManager.IsOwner() {
 				continue
 			}
+			if d.infoHandle == nil || !d.infoHandle.IsValid() {
+				continue
+			}
 			deadLockTables, err := d.tableLockCkr.GetDeadLockedTables(d.ctx, d.infoHandle.Get().AllSchemas())
 			if err != nil {
 				logutil.BgLogger().Info("[ddl] get dead table lock failed.", zap.Error(err))