Fix bad test sensitive_data_masking#13748
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alexey-milovidov merged 1 commit intomasterfrom Aug 15, 2020
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00956_sensitive_data_masking is still flacky even after ClickHouse#13748 [1]. [1]: https://clickhouse-test-reports.s3.yandex.net/10373/348ef1256ea8fb8f61109c33bbdd28daf46bdc8e/functional_stateless_tests_(debug).html#fail1 The problem is that it uses the following pattern: clickhouse-client -q ... & # run some query in background clickhouse-client -q 'show processlist' > log grep background-query log But there is no guarantee that the query in background will be executed before `show processlist`: 2020.08.18 02:52:47.916386 [ 26788 ] {98c36d38-f710-4dfb-af8f-61906abc163c} <Debug> executeQuery: (from [::1]:51650) SHOW PROCESSLIST ... 2020.08.18 02:52:47.926854 [ 26756 ] {086c64fa-713b-4f8c-b702-23bfea10a49c} <Debug> executeQuery: (from [::1]:51652) select count() from system.numbers where ignore('find_me_[hidden]')=0 and ignore('fwerkh_that_magic_string_make_me_unique') = 0 FORMAT Null Fix the test by waiting until the query in backgroud will start, and use limited numbers + sleepEachRow over system.numbers to reduce CPU usage.
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The test
00956_sensitive_data_masking.shcontains race condition and various bad practices.#5710
#12508