Solr is developed by contributors to the Apache Software Foundation (ASF) through an open, meritocratic process that goes well beyond simply sharing the source code. Visit the ASF website to learn more.
The Solr Community provides user support for free through the solr-user mailing list and other channels mentioned here. There are also a number of external companies and professionals ready to help, see the user-maintained list at wiki.apache.org/solr/Support.
Apache Solr is under active development with frequent feature releases on the current major version. The previous major version may still receive security- and bug fixes as point releases, thus taking the role of the LTS (Long Term Support) version. Older versions are considered EOL (End Of Life) and will not be further updated. For this reason it may also be difficult to obtain community support for EOL versions.
Large changes or changes that break compatibility with existing functionality are normally only included in the next major version.
|6.x||Current major version for feature releases (STABLE)|
|5.5.x||Version in the previous major release for bugfixes only (LTS)|
|7.0||Next major version, yet to be released (UNSTABLE)|
|<5.5||All older versions are End Of Life (EOL)|
For more about versions and upgrading Solr, see the Reference Guide chapter “Upgrading Solr”.
This list is for users of Solr to ask questions, share knowledge, and discuss issues. We strongly encourage users to send usage and configuration questions and problems to this mailing list. Before filing an issue in the JIRA issue tracker, make sure it's a real bug and that it hasn't been already discovered by discussing it here.
Send: solr-user (Requires subscription)
This is the list where participating developers of the Lucene and Solr projects meet and discuss issues concerning Lucene/Solr internals, code changes/additions, etc.
NOTE: Please do not send mail to this list with usage questions or configuration questions and problems, that is what the solr-user mailing list is for.
Send: dev (Requires subscription)
This list is for broader questions and discussions about the Lucene project, announcements, and for questions from users who have no idea where to get started (Lucene-Core?, Solr? PyLucene?)
Send: general (Requires subscription)
This is an automated announcement only list where notifications about every Lucene/Solr commit are sent.
The Solr Wiki maintains a list of searchable mailing list archives at
No endorsement is implied by the listing of an archive on the Wiki.
Each Lucene project maintains its own mailing lists. Please refer to the project you are interested in for details on subscribing to its mailing list.
There are two primary IRC channels dedicated to Solr at freenode.net.
• #solr -- Channel for Solr user questions
• #solr-dev -- Hangout for discussion of Solr development
The IRC channel can be used for online discussion about Lucene™/Solr related stuff, but developers should be careful to transfer all the official decisions or useful discussions to the issue tracking system. Note that the solr-user mailing list will reach a lot more people than the IRC channel, but if it's the right time of day, the IRC channel can offer a more interactive experience with faster turnaround.
This wiki page has links to a web-based IRC client, and a wealth of information about how to get the most out of the IRC channels.
Solr uses the ASF JIRA instance.
You can browse, search, and create issues here.
Patches welcome! This is not the correct place to start when you need support. Problems should be discussed on the mailing list and/or via IRC before creating an issue.
Looking to contribute to Solr? Read the instructions on contributing and then submit a patch!
The Solr source code resides in the Apache GIT repository. Various GIT clients can be obtained from git-scm.com. There are also GIT integrations for various IDEs. For Eclipse, look at EGit. IntelliJ has git support bundled, if you have installed the command line version.
The source code can be browsed via the Web at https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git. No GIT client software is required.
The code can also be browsed through our GitHub mirror at https://github.com/apache/lucene-solr/.
The GIT URL for anonymous users is http://git-wip-us.apache.org/repos/asf/lucene-solr.git. Instructions for non-committer GIT access are here.
The GIT URL for committers is https://git-wip-us.apache.org/repos/asf/lucene-solr.git. Instructions for committer GIT access are here.
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