*: fix oom action cancel bug (pingcap#10993)

executor/executor_test.go

@@ -60,6 +60,7 @@ import (
 	"github.com/pingcap/tidb/table/tables"
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
+	"github.com/pingcap/tidb/util"
 	"github.com/pingcap/tidb/util/admin"
 	"github.com/pingcap/tidb/util/codec"
 	"github.com/pingcap/tidb/util/logutil"
@@ -3958,6 +3959,24 @@ func (s *testOOMSuite) TestDistSQLMemoryControl(c *C) {
 	tk.Se.GetSessionVars().MemQuotaDistSQL = -1
 }
 
+func (s *testSuite) TestOOMPanicAction(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t")
+	tk.MustExec("create table t (a int primary key, b double);")
+	tk.MustExec("insert into t values (1,1)")
+	sm := &mockSessionManager1{
+		PS: make([]*util.ProcessInfo, 0),
+	}
+	tk.Se.SetSessionManager(sm)
+	s.domain.ExpensiveQueryHandle().SetSessionManager(sm)
+	config.GetGlobalConfig().OOMAction = config.OOMActionCancel
+	tk.MustExec("set @@tidb_mem_quota_query=1;")
+	err := tk.QueryToErr("select sum(b) from t group by a;")
+	c.Assert(err, NotNil)
+	c.Assert(err.Error(), Matches, "Out Of Memory Quota!.*")
+}
+
 type oomCapturer struct {
 	zapcore.Core
 	tracker string

store/tikv/coprocessor.go

@@ -620,7 +620,7 @@ func (worker *copIteratorWorker) handleTask(bo *Backoffer, task *copTask, respCh
 				zap.Stack("stack trace"))
 			resp := &copResponse{err: errors.Errorf("%v", r)}
 			// if panic has happened, set checkOOM to false to avoid another panic.
-			worker.sendToRespCh(resp, task.respChan, false)
+			worker.sendToRespCh(resp, respCh, false)
 		}
 	}()
 	remainTasks := []*copTask{task}