Apache Druid: a high performance real-time analytics database.
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Clear "lineSplittable" for JSON when using KafkaInputFormat. (#15692)
* Clear "lineSplittable" for JSON when using KafkaInputFormat.

JsonInputFormat has a "withLineSplittable" method that can be used to
control whether JSON is read line-by-line, or as a whole. The intent
is that in streaming ingestion, "lineSplittable" is false (although it
can be overridden by "assumeNewlineDelimited"), and in batch ingestion,
lineSplittable is true.

When a "json" format is wrapped by a "kafka" format, this isn't set
properly. This patch updates KafkaInputFormat to set this on an
underlying "json" format.

The tests for KafkaInputFormat were overriding the "lineSplittable"
parameter explicitly, which wasn't really fair, because that made them
unrealistic to what happens in production. Now they omit the parameter
and get the production behavior.

* Add test.

* Fix test coverage.
2024-01-18 03:22:41 -08:00
.github docs: Anchor link checker (#15624) 2024-01-08 15:19:05 -08:00
.idea Ignore misc.xml (#14362) 2023-06-02 12:00:52 +05:30
benchmarks Faster parsing: reduce String usage, list-based input rows. (#15681) 2024-01-18 19:18:46 +08:00
cloud Prepare master for Druid 29 (#15121) 2023-10-11 10:33:45 +05:30
codestyle fix rat and checkstyle issue (#15530) 2023-12-14 09:33:01 +08:00
dev Suggest adoption of Google Style guide (#14905) 2023-11-01 13:31:03 -07:00
distribution Add SpectatorHistogram extension (#15340) 2024-01-14 09:52:30 -08:00
docs Add SpectatorHistogram extension (#15340) 2024-01-14 09:52:30 -08:00
examples Do not allocate week granular segments unless requested (#15589) 2024-01-05 12:14:52 +05:30
extensions-contrib Fix comparator and remove deprecated methods from spectatorHistogram extension (#15698) 2024-01-17 21:59:53 -08:00
extensions-core Clear "lineSplittable" for JSON when using KafkaInputFormat. (#15692) 2024-01-18 03:22:41 -08:00
helm/druid helm: Add serviceAccounts, rbac, and small fixes (#13747) 2023-02-23 11:42:03 +05:30
hooks Git hooks should fail on errors; pass args to git hooks (#12322) 2022-03-10 09:07:50 +09:00
indexing-hadoop simplify IncrementalIndex since group-by v1 has been removed (#15448) 2023-11-29 14:46:16 -08:00
indexing-service Clear "lineSplittable" for JSON when using KafkaInputFormat. (#15692) 2024-01-18 03:22:41 -08:00
integration-tests Fix basic auth integration test (#15679) 2024-01-14 08:59:15 -08:00
integration-tests-ex Add MSQ Durable Storage Connector for Google Cloud Storage and change current Google Cloud Storage client library (#15398) 2023-12-14 07:34:49 +05:30
licenses Web console: Update and prune dependancies (#15487) 2023-12-05 14:25:07 -08:00
processing Clear "lineSplittable" for JSON when using KafkaInputFormat. (#15692) 2024-01-18 03:22:41 -08:00
publications De-incubation cleanup in code, docs, packaging (#9108) 2020-01-03 12:33:19 -05:00
server Clean up stale entries from upgradeSegments table (#15637) 2024-01-17 20:49:52 +05:30
services Report zero values instead of unknown for empty ingest queries (#15674) 2024-01-17 16:26:10 +05:30
sql Range support in window expressions (support them as groups) (#15365) 2024-01-17 00:05:21 -06:00
web-console Update load query detail archive dialog for file input support (#15632) 2024-01-10 20:48:46 -08:00
website Add SpectatorHistogram extension (#15340) 2024-01-14 09:52:30 -08:00
.asf.yaml .asf.yaml: Add required "repository" field. (#14499) 2023-06-28 15:05:07 -07:00
.backportrc.json Add 0.18.0 to .backportrc.json to facilitate backport. (#9661) 2020-04-11 13:49:04 -07:00
.codecov.yml Use Codecov (#8388) 2019-08-28 08:49:30 -07:00
.dockerignore Add docker container for druid (#6896) 2019-02-08 12:12:28 +00:00
.gitignore Docusaurus2 upgrade for master (#14411) 2023-08-16 19:01:21 -07:00
.lgtm.yml be consistent about referring to the web console by its name (#13118) 2022-09-19 15:02:17 -07:00
CONTRIBUTING.md Document our conventions for writing messages (#13916) 2023-04-03 21:30:20 -07:00
LABELS Fixing security vulnerability check errors (#13956) 2023-03-23 11:10:06 +05:30
LICENSE Adding the PropertyNamingStrategies from jackson for fixing hadoop ingestion (#14671) 2023-08-01 20:02:43 +05:30
NOTICE update NOTICE year, update kafka notice in licenses.yaml (#14299) 2023-05-17 04:32:19 -07:00
README.md Docusaurus2 upgrade for master (#14411) 2023-08-16 19:01:21 -07:00
README.template De-incubation cleanup in code, docs, packaging (#9108) 2020-01-03 12:33:19 -05:00
check_test_suite.py Update Hadoop3 as default build version (#14005) 2023-04-26 12:52:51 +05:30
check_test_suite_test.py remove Travis CI (#13789) 2023-02-10 01:46:56 -08:00
doap_Druid.rdf Fix the created property in DOAP RDF file (#14971) 2023-09-13 06:12:35 -07:00
it.sh Build reliablity fixes (#15048) 2023-09-28 12:27:52 -07:00
licenses.yaml Azure client upgrade to allow identity options (#15287) 2024-01-03 18:36:05 -05:00
owasp-dependency-check-suppressions.xml unpin snakeyaml, add suppressions and licenses (#15549) 2023-12-15 10:33:14 -08:00
pom.xml Faster parsing: reduce String usage, list-based input rows. (#15681) 2024-01-18 19:18:46 +08:00
upload.sh Adding licenses and enable apache-rat-plugin. (#6215) 2018-09-18 08:39:26 -07:00

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Apache Druid

Druid is a high performance real-time analytics database. Druid's main value add is to reduce time to insight and action.

Druid is designed for workflows where fast queries and ingest really matter. Druid excels at powering UIs, running operational (ad-hoc) queries, or handling high concurrency. Consider Druid as an open source alternative to data warehouses for a variety of use cases. The design documentation explains the key concepts.

Getting started

You can get started with Druid with our local or Docker quickstart.

Druid provides a rich set of APIs (via HTTP and JDBC) for loading, managing, and querying your data. You can also interact with Druid via the built-in web console (shown below).

Load data

data loader Kafka

Load streaming and batch data using a point-and-click wizard to guide you through ingestion setup. Monitor one off tasks and ingestion supervisors.

Manage the cluster

management

Manage your cluster with ease. Get a view of your datasources, segments, ingestion tasks, and services from one convenient location. All powered by SQL systems tables, allowing you to see the underlying query for each view.

Issue queries

query view combo

Use the built-in query workbench to prototype DruidSQL and native queries or connect one of the many tools that help you make the most out of Druid.

Documentation

See the latest documentation for the documentation for the current official release. If you need information on a previous release, you can browse previous releases documentation.

Make documentation and tutorials updates in /docs using Markdown or extended Markdown (MDX). Then, open a pull request.

To build the site locally, you need Node 16.14 or higher and to install Docusaurus 2 with npm|yarn install in the website directory. Then you can run npm|yarn start to launch a local build of the docs.

If you're looking to update non-doc pages like Use Cases, those files are in the druid-website-src repo.

Community

Visit the official project community page to read about getting involved in contributing to Apache Druid, and how we help one another use and operate Druid.

  • Druid users can find help in the druid-user mailing list on Google Groups, and have more technical conversations in #troubleshooting on Slack.
  • Druid development discussions take place in the druid-dev mailing list (dev@druid.apache.org). Subscribe by emailing dev-subscribe@druid.apache.org. For live conversations, join the #dev channel on Slack.

Check out the official community page for details of how to join the community Slack channels.

Find articles written by community members and a calendar of upcoming events on the project site - contribute your own events and articles by submitting a PR in the apache/druid-website-src repository.

Building from source

Please note that JDK 8 or JDK 11 is required to build Druid.

See the latest build guide for instructions on building Apache Druid from source.

Contributing

Please follow the community guidelines for contributing.

For instructions on setting up IntelliJ dev/intellij-setup.md

License

Apache License, Version 2.0