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conn: fix lost connection when insert from select panic cause by out of memory quota (#12090) #12127

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merged 3 commits into from Sep 11, 2019
Merged

conn: fix lost connection when insert from select panic cause by out of memory quota (#12090) #12127

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ba30282
conn: fix lost connection when insert from select panic cause by out …
crazycs520 Sep 10, 2019
1097de3
Merge branch 'release-3.0' into 12090-3.0
crazycs520 Sep 10, 2019
a37c6d9
Merge branch 'release-3.0' into 12090-3.0
zz-jason Sep 11, 2019
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13 changes: 13 additions & 0 deletions executor/adapter.go
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Expand Up @@ -43,6 +43,7 @@ import (
"github.com/pingcap/tidb/store/tikv"
"github.com/pingcap/tidb/util/chunk"
"github.com/pingcap/tidb/util/logutil"
"github.com/pingcap/tidb/util/memory"
"github.com/pingcap/tidb/util/sqlexec"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
Expand Down Expand Up @@ -207,6 +208,18 @@ func (a *ExecStmt) RebuildPlan(ctx context.Context) (int64, error) {
// like the INSERT, UPDATE statements, it executes in this function, if the Executor returns
// result, execution is done after this function returns, in the returned sqlexec.RecordSet Next method.
func (a *ExecStmt) Exec(ctx context.Context) (_ sqlexec.RecordSet, err error) {
defer func() {
r := recover()
if r == nil {
return
}
if str, ok := r.(string); !ok || !strings.HasPrefix(str, memory.PanicMemoryExceed) {
panic(r)
}
err = errors.Errorf("%v", r)
logutil.Logger(ctx).Error("execute sql panic", zap.String("sql", a.Text), zap.Stack("stack"))
}()

sctx := a.Ctx
if _, ok := a.Plan.(*plannercore.Analyze); ok && sctx.GetSessionVars().InRestrictedSQL {
oriStats, _ := sctx.GetSessionVars().GetSystemVar(variable.TiDBBuildStatsConcurrency)
Expand Down
10 changes: 10 additions & 0 deletions executor/executor_test.go
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Expand Up @@ -4184,6 +4184,16 @@ func (s *testSuite) TestOOMPanicAction(c *C) {
err := tk.QueryToErr("select sum(b) from t group by a;")
c.Assert(err, NotNil)
c.Assert(err.Error(), Matches, "Out Of Memory Quota!.*")

// Test insert from select oom panic.
tk.MustExec("drop table if exists t,t1")
tk.MustExec("create table t (a bigint);")
tk.MustExec("create table t1 (a bigint);")
tk.MustExec("insert into t1 values (1),(2),(3),(4),(5);")
tk.MustExec("set @@tidb_mem_quota_query=200;")
_, err = tk.Exec("insert into t select a from t1 order by a desc;")
c.Assert(err, NotNil)
c.Assert(err.Error(), Matches, "Out Of Memory Quota!.*")
}

type oomCapturer struct {
Expand Down