TestStreamRecvWithErrorNormal is unstable

[zhaoxinyu]

Which jobs are flaking?

ut-check

Which test(s) are flaking?

TestStreamRecvWithErrorNormal

Jenkins logs or GitHub Actions link

[2022-05-17T02:48:44.045Z]         	Error Trace:	client_test.go:1491
[2022-05-17T02:48:44.045Z]         	            				client_test.go:1674
[2022-05-17T02:48:44.045Z]         	Error:      	Not equal: 
[2022-05-17T02:48:44.045Z]         	            	expected: []model.RegionFeedEvent{model.RegionFeedEvent{Val:(*model.RawKVEntry)(nil), Resolved:(*model.ResolvedSpan)(0xc0006eec40), RegionID:0x3}, model.RegionFeedEvent{Val:(*model.RawKVEntry)(nil), Resolved:(*model.ResolvedSpan)(0xc0006eec80), RegionID:0x3}}
[2022-05-17T02:48:44.045Z]         	            	actual  : []model.RegionFeedEvent{}
[2022-05-17T02:48:44.045Z]         	            	
[2022-05-17T02:48:44.045Z]         	            	Diff:
[2022-05-17T02:48:44.045Z]         	            	--- Expected
[2022-05-17T02:48:44.045Z]         	            	+++ Actual
[2022-05-17T02:48:44.045Z]         	            	@@ -1,32 +1,2 @@
[2022-05-17T02:48:44.045Z]         	            	-([]model.RegionFeedEvent) (len=2) {
[2022-05-17T02:48:44.045Z]         	            	- (model.RegionFeedEvent) {
[2022-05-17T02:48:44.045Z]         	            	-  Val: (*model.RawKVEntry)(<nil>),
[2022-05-17T02:48:44.045Z]         	            	-  Resolved: (*model.ResolvedSpan)({
[2022-05-17T02:48:44.045Z]         	            	-   Span: (regionspan.ComparableSpan) {
[2022-05-17T02:48:44.045Z]         	            	-    Start: ([]uint8) (len=1) {
[2022-05-17T02:48:44.045Z]         	            	-     00000000  61                                                |a|
[2022-05-17T02:48:44.045Z]         	            	-    },
[2022-05-17T02:48:44.045Z]         	            	-    End: ([]uint8) (len=1) {
[2022-05-17T02:48:44.045Z]         	            	-     00000000  62                                                |b|
[2022-05-17T02:48:44.045Z]         	            	-    }
[2022-05-17T02:48:44.045Z]         	            	-   },
[2022-05-17T02:48:44.045Z]         	            	-   ResolvedTs: (uint64) 120
[2022-05-17T02:48:44.045Z]         	            	-  }),
[2022-05-17T02:48:44.045Z]         	            	-  RegionID: (uint64) 3
[2022-05-17T02:48:44.045Z]         	            	- },
[2022-05-17T02:48:44.045Z]         	            	- (model.RegionFeedEvent) {
[2022-05-17T02:48:44.045Z]         	            	-  Val: (*model.RawKVEntry)(<nil>),
[2022-05-17T02:48:44.045Z]         	            	-  Resolved: (*model.ResolvedSpan)({
[2022-05-17T02:48:44.045Z]         	            	-   Span: (regionspan.ComparableSpan) {
[2022-05-17T02:48:44.045Z]         	            	-    Start: ([]uint8) (len=1) {
[2022-05-17T02:48:44.045Z]         	            	-     00000000  61                                                |a|
[2022-05-17T02:48:44.045Z]         	            	-    },
[2022-05-17T02:48:44.045Z]         	            	-    End: ([]uint8) (len=1) {
[2022-05-17T02:48:44.045Z]         	            	-     00000000  62                                                |b|
[2022-05-17T02:48:44.045Z]         	            	-    }
[2022-05-17T02:48:44.045Z]         	            	-   },
[2022-05-17T02:48:44.045Z]         	            	-   ResolvedTs: (uint64) 120
[2022-05-17T02:48:44.045Z]         	            	-  }),
[2022-05-17T02:48:44.045Z]         	            	-  RegionID: (uint64) 3
[2022-05-17T02:48:44.045Z]         	            	- }
[2022-05-17T02:48:44.045Z]         	            	+([]model.RegionFeedEvent) {
[2022-05-17T02:48:44.045Z]         	            	 }
[2022-05-17T02:48:44.045Z]         	Test:       	TestStreamRecvWithErrorNormal

https://ci.pingcap.net/blue/organizations/jenkins/ut-check/detail/ut-check/11754/pipeline/

Anything else we need to know

• Does this test exist for other branches as well?

• Has there been a high frequency of failure lately?