9f31488e50
On CI you can find that 01747_executable_pool_dictionary_implicit_key can hang [1], it is possible due to after CANNOT_SCHEDULE_TASK the async loading will hang: 2024.07.18 03:56:32.365226 [ 6138 ] {6206a18f-668c-4a5c-a5ad-07f577220762} <Trace> ExternalDictionariesLoader: Will load the object 'executable_pool_simple_implicit_key' in background, force = false, loading_id = 2 2024.07.18 03:56:32.368005 [ 6138 ] {6206a18f-668c-4a5c-a5ad-07f577220762} <Error> executeQuery: Code: 439. DB::Exception: Cannot schedule a task: fault injected (threads=766, jobs=746): In scope SELECT dictGet('executable_pool_simple_implicit_key', 'a', toUInt64(1)). (CANNOT_SCHEDULE_TASK) (version 24.7.1.2241) (from [::1]:56446) (comment: 01747_executable_pool_dictionary_implicit_key.sql) (in query: SELECT dictGet('executable_pool_simple_implicit_key', 'a', toUInt64(1));), Stack trace (when copying this message, always include the lines below): 0. /build/contrib/llvm-project/libcxx/include/exception:141: Poco::Exception::Exception(String const&, int) @ 0x0000000015f8a292 1. /build/src/Common/Exception.cpp:110: DB::Exception::Exception(DB::Exception::MessageMasked&&, int, bool) @ 0x000000000c3df6b9 2. /build/contrib/llvm-project/libcxx/include/string:1499: DB::Exception::Exception(PreformattedMessage&&, int) @ 0x0000000006de714c 3. /build/contrib/llvm-project/libcxx/include/vector:438: DB::Exception::Exception<String const&, unsigned long, unsigned long&>(int, FormatStringHelperImpl<std::type_identity<String const&>::type, std::type_identity<unsigned long>::type, std::type_identity<unsigned long&>::type>, String const&, unsigned long&&, unsigned long&) @ 0x000000000c4838eb 4. /build/src/Common/ThreadPool.cpp:0: void ThreadPoolImpl<std::thread>::scheduleImpl<void>(std::function<void ()>, Priority, std::optional<unsigned long>, bool)::'lambda'(String const&)::operator()(String const&) const @ 0x000000000c4832d3 5. /build/src/Common/ThreadPool.cpp:186: void ThreadPoolImpl<std::thread>::scheduleImpl<void>(std::function<void ()>, Priority, std::optional<unsigned long>, bool) @ 0x000000000c47e7db 6. /build/contrib/llvm-project/libcxx/include/__functional/function.h:818: ? @ 0x000000000c47ec8d 7. /build/contrib/llvm-project/libcxx/include/__functional/function.h:818: ? @ 0x000000001114b16e 8. /build/contrib/llvm-project/libcxx/include/__memory/shared_ptr.h:701: DB::ExternalLoader::LoadingDispatcher::startLoading(DB::ExternalLoader::LoadingDispatcher::Info&, bool, unsigned long) @ 0x0000000011147733 9. /build/src/Interpreters/ExternalLoader.cpp:837: DB::ExternalLoader::LoadingDispatcher::loadImpl(String const&, std::chrono::duration<long long, std::ratio<1l, 1000l>>, bool, std::unique_lock<std::mutex>&)::'lambda'()::operator()() const @ 0x0000000011158bf9 10. /build/contrib/llvm-project/libcxx/include/__mutex_base:397: DB::ExternalLoader::LoadingDispatcher::loadImpl(String const&, std::chrono::duration<long long, std::ratio<1l, 1000l>>, bool, std::unique_lock<std::mutex>&) @ 0x00000000111588bc 11. /build/src/Interpreters/ExternalLoader.cpp:604: DB::ExternalLoader::LoadResult DB::ExternalLoader::LoadingDispatcher::tryLoad<DB::ExternalLoader::LoadResult>(String const&, std::chrono::duration<long long, std::ratio<1l, 1000l>>) @ 0x00000000111440bf 12. /build/src/Interpreters/ExternalLoader.cpp:1381: std::shared_ptr<DB::IExternalLoadable const> DB::ExternalLoader::load<std::shared_ptr<DB::IExternalLoadable const>, void>(String const&) const @ 0x00000000111442f5 13. /build/contrib/llvm-project/libcxx/include/__memory/shared_ptr.h:587: DB::ExternalDictionariesLoader::getDictionary(String const&, std::shared_ptr<DB::Context const>) const @ 0x0000000011141028 14. /build/src/Functions/FunctionsExternalDictionaries.h:76: DB::FunctionDictHelper::getDictionary(String const&) @ 0x00000000071d28ec ... 2024.07.18 03:58:29.000900 [ 48468 ] {8cf63d7e-dcbf-4af6-bd7c-0e1789ddce3b} <Debug> executeQuery: (from [::1]:40410) (comment: 01747_executable_pool_dictionary_implicit_key.sql) SELECT dictGet('executable_pool_simple_implicit_key', 'a', toUInt64(1)); (stage: Complete) # and no more rows for 8cf63d7e-dcbf-4af6-bd7c-0e1789ddce3b [1]: https://s3.amazonaws.com/clickhouse-test-reports/66495/bc029ed8207ac75e96e9cb48cb79d27a9ffa4e2f/stress_test__debug_.html The problem that it should be properly cancelled, otherwise it will not be loaded in loadImpl(), but will be waited. Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com> |
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CHANGELOG.md | ||
CMakeLists.txt | ||
CODE_OF_CONDUCT.md | ||
CONTRIBUTING.md | ||
format_sources | ||
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PreLoad.cmake | ||
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SECURITY.md |
ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time.
How To Install (Linux, macOS, FreeBSD)
curl https://clickhouse.com/ | sh
Useful Links
- Official website has a quick high-level overview of ClickHouse on the main page.
- ClickHouse Cloud ClickHouse as a service, built by the creators and maintainers.
- Tutorial shows how to set up and query a small ClickHouse cluster.
- Documentation provides more in-depth information.
- YouTube channel has a lot of content about ClickHouse in video format.
- Slack and Telegram allow chatting with ClickHouse users in real-time.
- Blog contains various ClickHouse-related articles, as well as announcements and reports about events.
- Code Browser (github.dev) with syntax highlighting, powered by github.dev.
- Contacts can help to get your questions answered if there are any.
Monthly Release & Community Call
Every month we get together with the community (users, contributors, customers, those interested in learning more about ClickHouse) to discuss what is coming in the latest release. If you are interested in sharing what you've built on ClickHouse, let us know.
- v24.8 Community Call - August 29
Upcoming Events
Keep an eye out for upcoming meetups and events around the world. Somewhere else you want us to be? Please feel free to reach out to tyler <at>
clickhouse <dot>
com. You can also peruse ClickHouse Events for a list of all upcoming trainings, meetups, speaking engagements, etc.
- MORE COMING SOON!
Recent Recordings
- Recent Meetup Videos: Meetup Playlist Whenever possible recordings of the ClickHouse Community Meetups are edited and presented as individual talks. Current featuring "Modern SQL in 2023", "Fast, Concurrent, and Consistent Asynchronous INSERTS in ClickHouse", and "Full-Text Indices: Design and Experiments"
- Recording available: v24.4 Release Call All the features of 24.4, one convenient video! Watch it now!
Interested in joining ClickHouse and making it your full-time job?
We are a globally diverse and distributed team, united behind a common goal of creating industry-leading, real-time analytics. Here, you will have an opportunity to solve some of the most cutting-edge technical challenges and have direct ownership of your work and vision. If you are a contributor by nature, a thinker and a doer - we’ll definitely click!
Check out our current openings here: https://clickhouse.com/company/careers
Can't find what you are looking for, but want to let us know you are interested in joining ClickHouse? Email careers@clickhouse.com!