unstable test TestAsyncLoad/TestOperateRunningJob

[hawkingrei]

Bug Report

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1. Minimal reproduce step (Required)

2. What did you expect to see? (Required)

3. What did you see instead (Required)

    testkit.go:416: 

        	Error Trace:	testkit/testkit.go:416

        	            				executor/asyncloaddata/operate_test.go:83

        	            				src/runtime/asm_amd64.s:1598

        	Error:      	An error is expected but got nil.

        	Test:       	TestAsyncLoad/TestOperateRunningJob

    show_test.go:104: 

        	Error Trace:	executor/asyncloaddata/show_test.go:104

        	            				executor/asyncloaddata/operate_test.go:108

        	Error:      	Not equal: 

        	            	expected: "canceled"

        	            	actual  : "finished"

        	            	

        	            	Diff:

        	            	--- Expected

        	            	+++ Actual

        	            	@@ -1 +1 @@

        	            	-canceled

        	            	+finished

        	Test:       	TestAsyncLoad/TestOperateRunningJob

4. What is your TiDB version? (Required)

[hawkingrei]

https://do.pingcap.net/jenkins/blue/organizations/jenkins/pingcap%2Ftidb%2Fghpr_unit_test/detail/ghpr_unit_test/20008/pipeline