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Remove flaky test#50558

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alexey-milovidov merged 1 commit intomasterfrom
remove-flaky-test
Jun 5, 2023
Merged

Remove flaky test#50558
alexey-milovidov merged 1 commit intomasterfrom
remove-flaky-test

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This closes #48691.

Details:

Alexey Milovidov
@alexander Tokmakov, you should know about this: https://s3.amazonaws.com/clickhouse-test-reports/50533/009fe3d25e8a755e86d45084f2af57[…]ease__[2_4]/integration_run_test_merge_tree_s3_test_py_0.log
(this test fails very frequently)
PS. I checked the code DatabaseCatalog::cleanupStoreDirectoryTask and it looks dangerous - we are removing data when it is unexpected. Maybe better do nothing (when we found some garbage, we should not touch it, or move to a safe place, instead of removing).

Alexey Milovidov
@igor Nikonov, if you attempted to fix this test, you might want to know that it didn't help.

Alexey Milovidov
@alexander Tokmakov, what is the whole motivation of this test_store_cleanup_disk_s3 ?
It does manual intervention to filesystem - not a scenario to expect in production. Maybe remove it?

Alexey Milovidov
If you know the motivation for this test - provide it directly in comments.

Alexander Tokmakov
The motivation is: check that background cleanup of leftovers works as expected (it's not easy to create some leftovers in a natural way). I thought that @igor Nikonov is working on fixing the test (#48691 is assigned to him), but I will take a look by myself if he cannot do it
PS. I checked the code DatabaseCatalog::cleanupStoreDirectoryTask and it looks dangerous - we are removing data when it is unexpected. Maybe better do nothing (when we found some garbage, we should not touch it, or move to a safe place, instead of removing).

At first we set permissions to 000 and only then remove after one month. And in tests we remove it after 1 second, no issues found. So it's not that dangerous. Initially we used to do nothing, but Yandex had some complaints about garbage in store/ dir that was hard to remove manually
#48691 test_store_cleanup_disk_s3 is flaky
https://s3.amazonaws.com/clickhouse-test-reports/0/c3482a104f73f237450f7d7781871859472687d9/integration_tests__asan__[6/6].html
https://play.clickhouse.com/play?user=play#U0VMRUNUIHB1bGxfcmVxdWVzdF9udW1iZXIsIGNoZWNrX3N0YXJ0X3RpbWUsIGNoZWNrX25hbWUsIHRlc3RfbmFtZSwgdGVzdF9zdGF0dXMsIGNoZWNrX3N0YXR1cywgcmVwb3J0X3VybApGUk9NIGNoZWNrcwpXSEVSRSAxCiAgICAtLUFORCBwdWxsX3JlcXVlc3RfbnVtYmVyID0gMAogICAgQU5EIHRlc3Rfc3RhdHVzICE9ICdTS0lQUEVEJwogICAgQU5EIHRlc3Rfc3RhdHVzICE9ICdPSycKICAgIEFORCBjaGVja19zdGF0dXMgIT0gJ3N1Y2Nlc3MnCiAgICBBTkQgdGVzdF9uYW1lIGxpa2UgJyV0ZXN0X3N0b3JlX2NsZWFudXBfZGlza19zMyUnCk9SREVSIEJZIGNoZWNrX3N0YXJ0X3RpbWUgZGVzYywgY2hlY2tfbmFtZSwgdGVzdF9uYW1l

Alexey Milovidov
I see we failed to fix it in two months, do you mind if I'll remove this test?

TLDR: the feature should not have existed in the first place.

@robot-ch-test-poll3 robot-ch-test-poll3 added the pr-not-for-changelog This PR should not be mentioned in the changelog label Jun 5, 2023
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robot-ch-test-poll3 commented Jun 5, 2023

This is an automated comment for commit 4234c4f with description of existing statuses. It's updated for the latest CI running
The full report is available here
The overall status of the commit is 🔴 failure

Check nameDescriptionStatus
AST fuzzerRuns randomly generated queries to catch program errors. The build type is optionally given in parenthesis. If it fails, ask a maintainer for help🟢 success
CI runningA meta-check that indicates the running CI. Normally, it's in success or pending state. The failed status indicates some problems with the PR🟢 success
ClickHouse build checkBuilds ClickHouse in various configurations for use in further steps. You have to fix the builds that fail. Build logs often has enough information to fix the error, but you might have to reproduce the failure locally. The cmake options can be found in the build log, grepping for cmake. Use these options and follow the general build process🟢 success
Compatibility checkChecks that clickhouse binary runs on distributions with old libc versions. If it fails, ask a maintainer for help🟢 success
Docker image for serversThe check to build and optionally push the mentioned image to docker hub🟢 success
Fast testNormally this is the first check that is ran for a PR. It builds ClickHouse and runs most of stateless functional tests, omitting some. If it fails, further checks are not started until it is fixed. Look at the report to see which tests fail, then reproduce the failure locally as described here🟢 success
Flaky testsChecks if new added or modified tests are flaky by running them repeatedly, in parallel, with more randomization. Functional tests are run 100 times with address sanitizer, and additional randomization of thread scheduling. Integrational tests are run up to 10 times. If at least once a new test has failed, or was too long, this check will be red. We don't allow flaky tests, read the doc🟢 success
Install packagesChecks that the built packages are installable in a clear environment🟢 success
Integration testsThe integration tests report. In parenthesis the package type is given, and in square brackets are the optional part/total tests🟢 success
Mergeable CheckChecks if all other necessary checks are successful🟢 success
Performance ComparisonMeasure changes in query performance. The performance test report is described in detail here. In square brackets are the optional part/total tests🟢 success
Push to DockerhubThe check for building and pushing the CI related docker images to docker hub🟢 success
SQLancerFuzzing tests that detect logical bugs with SQLancer tool🟢 success
SqllogicRun clickhouse on the sqllogic test set against sqlite and checks that all statements are passed🟢 success
Stateful testsRuns stateful functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc🟢 success
Stateless testsRuns stateless functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc🟢 success
Stress testRuns stateless functional tests concurrently from several clients to detect concurrency-related errors🔴 failure
Style CheckRuns a set of checks to keep the code style clean. If some of tests failed, see the related log from the report🟢 success
Unit testsRuns the unit tests for different release types🟢 success
Upgrade checkRuns stress tests on server version from last release and then tries to upgrade it to the version from the PR. It checks if the new server can successfully startup without any errors, crashes or sanitizer asserts🟢 success

@alexey-milovidov alexey-milovidov merged commit afdf7ea into master Jun 5, 2023
@alexey-milovidov alexey-milovidov deleted the remove-flaky-test branch June 5, 2023 08:14
@alexey-milovidov alexey-milovidov self-assigned this Jun 5, 2023
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test_store_cleanup_disk_s3 is flaky

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