Unstable test explainfor_test.go:79: testSerialSuite.TestExplainFor #28348
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[2021-09-26T02:50:10.965Z] FAIL: explainfor_test.go:79: testSerialSuite.TestExplainFor
[2021-09-26T02:50:10.965Z]
[2021-09-26T02:50:10.965Z] explainfor_test.go:125:
[2021-09-26T02:50:10.965Z] check()
[2021-09-26T02:50:10.965Z] explainfor_test.go:120:
[2021-09-26T02:50:10.965Z] c.Assert(buf.String(), Matches, ""+
[2021-09-26T02:50:10.965Z] "TableReader_5 10000.00 0 root time:.*, loops:1, cop_task: {num:.*, max:.*, proc_keys: 0, rpc_num: 1, rpc_time:.*} data:TableFullScan_4 N/A N/A\n"+
[2021-09-26T02:50:10.965Z] "└─TableFullScan_4 10000.00 0 cop.* table:t1 tikv_task:{time:.*, loops:0} keep order:false, stats:pseudo N/A N/A")
[2021-09-26T02:50:10.965Z] ... value string = "" +
[2021-09-26T02:50:10.965Z] ... "TableReader_5 10000.00 0 root time:3.55ms, loops:1, cop_task: {num: 1, max: 2.84ms, proc_keys: 0, tot_proc: 2ms, rpc_num: 1, rpc_time: 2.59ms, copr_cache_hit_ratio: 0.00} data:TableFullScan_4 N/A N/A\n" +
[2021-09-26T02:50:10.965Z] ... "└─TableFullScan_4 10000.00 0 cop[tikv] table:t1 tikv_task:{time:0s, loops:0} keep order:false, stats:pseudo N/A N/A"
[2021-09-26T02:50:10.965Z] ... regex string = "" +
[2021-09-26T02:50:10.965Z] ... "TableReader_5 10000.00 0 root time:.*, loops:1, cop_task: {num:.*, max:.*, proc_keys: 0, rpc_num: 1, rpc_time:.*} data:TableFullScan_4 N/A N/A\n" +
[2021-09-26T02:50:10.965Z] ... "└─TableFullScan_4 10000.00 0 cop.* table:t1 tikv_task:{time:.*, loops:0} keep order:false, stats:pseudo N/A N/A"