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ClickHouse® is a real-time analytics DBMS
f37dac03f4
CI stress founds [1], TSan report:
WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock) (pid=509)
Cycle in lock order graph: M71436201 (0x7b5800a91308) => M237700395169415472 (0x000000000000) => M71436201
Mutex M237700395169415472 acquired here while holding mutex M71436201 in thread T723:
3 std::__1::lock_guard<std::__1::mutex>::lock_guard(std::__1::mutex&) obj-x86_64-linux-gnu/../contrib/libcxx/include/__mutex_base:91:27 (clickhouse+0x154b0db9)
4 DB::DatabaseWithOwnTablesBase::tryGetTable() const obj-x86_64-linux-gnu/../src/Databases/DatabasesCommon.cpp:37:21 (clickhouse+0x154b0db9)
5 DB::DatabaseMemory::tryGetTableUUID() const obj-x86_64-linux-gnu/../src/Databases/DatabaseMemory.cpp:95:22 (clickhouse+0x15466bb5)
6 DB::Context::resolveStorageID() const obj-x86_64-linux-gnu/../src/Interpreters/Context.cpp:2672:90 (clickhouse+0x155e6aa1)
7 DB::JoinedTables::getLeftTableStorage() obj-x86_64-linux-gnu/../src/Interpreters/JoinedTables.cpp:200:29 (clickhouse+0x15eee962)
8 DB::InterpreterSelectQuery::InterpreterSelectQuery() obj-x86_64-linux-gnu/../src/Interpreters/InterpreterSelectQuery.cpp:321:33 (clickhouse+0x15b792be)
9 DB::InterpreterSelectQuery::InterpreterSelectQuery() obj-x86_64-linux-gnu/../src/Interpreters/InterpreterSelectQuery.cpp:160:7 (clickhouse+0x15b78160)
10 DB::StorageLiveView::collectMergeableBlocks() obj-x86_64-linux-gnu/../src/Storages/LiveView/StorageLiveView.cpp:113:28 (clickhouse+0x16aae192)
11 DB::StorageLiveView::getNewBlocks() obj-x86_64-linux-gnu/../src/Storages/LiveView/StorageLiveView.cpp:384:33 (clickhouse+0x16ab393a)
12 DB::StorageLiveView::refresh(bool) obj-x86_64-linux-gnu/../src/Storages/LiveView/StorageLiveView.cpp:528:13 (clickhouse+0x16ab6395)
13 DB::StorageLiveView::read() obj-x86_64-linux-gnu/../src/Storages/LiveView/StorageLiveView.cpp:545:9 (clickhouse+0x16ab6395)
21 DB::executeQuery(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::shared_ptr<DB::Context>, bool, DB::QueryProcessingStage::Enum) obj-x86_64-linux-gnu/../src/Interpreters/executeQuery.cpp:950:30 (clickhouse+0x16101441)
Hint: use TSAN_OPTIONS=second_deadlock_stack=1 to get more informative warning message
Mutex M71436201 acquired here while holding mutex M237700395169415472 in thread T723:
3 std::__1::lock_guard<std::__1::mutex>::lock_guard(std::__1::mutex&) obj-x86_64-linux-gnu/../contrib/libcxx/include/__mutex_base:91:27 (clickhouse+0x16ab5c29)
4 DB::StorageLiveView::drop() obj-x86_64-linux-gnu/../src/Storages/LiveView/StorageLiveView.cpp:477:21 (clickhouse+0x16ab5c29)
5 DB::DatabaseMemory::dropTable() obj-x86_64-linux-gnu/../src/Databases/DatabaseMemory.cpp:44:16 (clickhouse+0x15465cd6)
8 DB::InterpreterDropQuery::execute() obj-x86_64-linux-gnu/../src/Interpreters/InterpreterDropQuery.cpp:62:16 (clickhouse+0x15afa679)
[1]: https://clickhouse-test-reports.s3.yandex.net/29856/42ca2b4bb241827edf69bbd6938d6b19c31935f1/stress_test_(thread).html#fail1
v2: fix attachTableUnlocked() (as pointed by @tavplubix)
v3: use SCOPE_EXIT() and so avoid holding a lock during removing from fs
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ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real time.
Useful Links
- Official website has quick high-level overview of ClickHouse on main page.
- Tutorial shows how to set up and query 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 to chat with ClickHouse users in real-time.
- Blog contains various ClickHouse-related articles, as well as announcements and reports about events.
- Code Browser with syntax highlight and navigation.
- Contacts can help to get your questions answered if there are any.