a517f8ce49
Removes the coordinator sanity check that prevents it from dropping all segments. It's useful to get rid of this, since the behavior is unintuitive for dev/testing clusters where users might regularly want to drop all their data to get back to a clean slate. But the sanity check was there for a reason: to prevent a race condition where the coordinator might drop all segments if it ran before the first metadata store poll finished. This patch addresses that concern differently, by allowing methods in MetadataSegmentManager to return null if a poll has not happened yet, and canceling coordinator runs in that case. This patch also makes the "dataSources" reference in SQLMetadataSegmentManager volatile. I'm not sure why it wasn't volatile before, but it seems necessary to me: it's not final, and it's dereferenced from multiple threads without synchronization. |
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| cloud | ||
| codestyle | ||
| core | ||
| distribution | ||
| docs | ||
| examples | ||
| extendedset | ||
| extensions-contrib | ||
| extensions-core | ||
| hll | ||
| indexing-hadoop | ||
| indexing-service | ||
| integration-tests | ||
| licenses | ||
| processing | ||
| publications | ||
| server | ||
| services | ||
| sql | ||
| web-console | ||
| .dockerignore | ||
| .gitignore | ||
| .travis.yml | ||
| CONTRIBUTING.md | ||
| DISCLAIMER | ||
| INTELLIJ_SETUP.md | ||
| LABELS.md | ||
| LICENSE | ||
| LICENSE.BINARY | ||
| NOTICE | ||
| NOTICE.BINARY | ||
| README.md | ||
| druid_intellij_formatting.xml | ||
| eclipse.importorder | ||
| eclipse_formatting.xml | ||
| intellij-sdk-config.jpg | ||
| pom.xml | ||
| upload.sh | ||
README.md
Apache Druid (incubating)
Apache Druid (incubating) is a high performance analytics data store for event-driven data.
Disclaimer: Apache Druid is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.
License
More Information
More information about Druid can be found on http://www.druid.io.
Documentation
You can find the documentation for the latest Druid release on the project website.
If you would like to contribute documentation, please do so under
/docs/content in this repository and submit a pull request.
Getting Started
You can get started with Druid with our quickstart.
Reporting Issues
If you find any bugs, please file a GitHub issue.
Community
The Druid community is in the process of migrating to Apache by way of the Apache Incubator. Eventually, as we proceed along this path, our site will move from http://druid.io/ to https://druid.apache.org/.
Community support is available on the druid-user mailing list(druid-user@googlegroups.com), which is hosted at Google Groups.
Development discussions occur on dev@druid.apache.org, which you can subscribe to by emailing dev-subscribe@druid.apache.org.
We also have a couple people hanging out on IRC in #druid-dev on
irc.freenode.net.
Building From Source
Please note that JDK 8 is required to build Druid.
For instructions on building Druid from source, see docs/content/development/build.md
Contributing
Please follow the guidelines listed here.