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ClickHouse® is a real-time analytics DBMS
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The test is a stress test which queries all system tables in parallel. System table SYSTEM.MODELS is now populated using the library-bridge. This made the test fail with error: 2022-09-12 23:51:34 Code: 410. DB::Exception: Received from localhost:9000. DB::Exception: BridgeHelper: clickhouse-library-bridge is not responding. (EXTERNAL_SERVER_IS_NOT_RESPONDING) 2022-09-12 23:51:34 (query: SELECT * FROM system.models LIMIT 10000 FORMAT Null) Looking at the logs, the server tried to start the library-bridge when querying SYSTEM.MODELS but multiple handshake attempts failed. So (most likely) the infrastructure is slow or (unlikely) there are settings in CI (e.g. a firewall) preventing communication with the bridge. Because 1. other system tables are also excluded (zookeeper, merge_tree_metadata_cache), 2. SYSTEM.MODELS is tested in integration test "test_catboost_evaluate" and 3. the test runs locally just fine, I am excluding SYSTEM.MODELS from it. |
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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 a quick high-level overview of ClickHouse on the main page.
- 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 (Woboq) with syntax highlight and navigation.
- Code Browser (github.dev) with syntax highlight, powered by github.dev.
- Contacts can help to get your questions answered if there are any.
Upcoming events
- v22.9 Release Webinar Original creator, co-founder, and CTO of ClickHouse Alexey Milovidov will walk us through the highlights of the release, provide live demos, and share vision into what is coming in the roadmap.
- ClickHouse for Analytics @ Barracuda Networks Join us for this in person meetup hosted by our friends at Barracuda in Bay Area.