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sink/mq: fix empty value in open protocol #2615

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merged 3 commits into from
Aug 24, 2021
Merged

sink/mq: fix empty value in open protocol #2615

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26b24e4
sink/mq: fix empty value in open protocol
amyangfei Aug 24, 2021
563e5da
fix unit test
amyangfei Aug 24, 2021
b3a7b5d
Merge branch 'master' into fix-empty-mq-message
ti-chi-bot Aug 24, 2021
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6 changes: 6 additions & 0 deletions cdc/sink/codec/json.go
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Original file line number Diff line number Diff line change
Expand Up @@ -395,6 +395,12 @@ func (d *JSONEventBatchEncoder) EncodeCheckpointEvent(ts uint64) (*MQMessage, er

// AppendRowChangedEvent implements the EventBatchEncoder interface
func (d *JSONEventBatchEncoder) AppendRowChangedEvent(e *model.RowChangedEvent) (EncoderResult, error) {
// Some transactions could generate empty row change event, such as
// begin; insert into t (id) values (1); delete from t where id=1; commit;
// Just ignore these row changed events
if len(e.Columns) == 0 && len(e.PreColumns) == 0 {
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Do we need to add the issue link here?

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IMHO we can trace the issue from commit message and pr description.

return EncoderNoOperation, nil
}
keyMsg, valueMsg := rowEventToMqMessage(e)
key, err := keyMsg.Encode()
if err != nil {
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22 changes: 22 additions & 0 deletions cdc/sink/codec/json_test.go
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Expand Up @@ -304,6 +304,28 @@ func (s *batchSuite) TestMaxBatchSize(c *check.C) {
c.Check(sum, check.Equals, 10000)
}

func (s *batchSuite) TestEmptyMessage(c *check.C) {
defer testleak.AfterTest(c)()
encoder := NewJSONEventBatchEncoder()
err := encoder.SetParams(map[string]string{"max-batch-size": "64"})
c.Check(err, check.IsNil)

emptyEvent := &model.RowChangedEvent{
CommitTs: 1,
Table: &model.TableName{Schema: "a", Table: "b"},
Columns: []*model.Column{},
}

for i := 0; i < 10000; i++ {
r, err := encoder.AppendRowChangedEvent(emptyEvent)
c.Check(r, check.Equals, EncoderNoOperation)
c.Check(err, check.IsNil)
}

messages := encoder.Build()
c.Assert(messages, check.HasLen, 0)
}

func (s *batchSuite) TestDefaultEventBatchCodec(c *check.C) {
defer testleak.AfterTest(c)()
s.testBatchCodec(c, func() EventBatchEncoder {
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1 change: 1 addition & 0 deletions cdc/sink/mq_test.go
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Expand Up @@ -79,6 +79,7 @@ func (s mqSinkSuite) TestKafkaSink(c *check.C) {
},
StartTs: 100,
CommitTs: 120,
Columns: []*model.Column{{Name: "col1", Type: 1, Value: "aa"}},
}
err = sink.EmitRowChangedEvents(ctx, row)
c.Assert(err, check.IsNil)
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