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# Apache Lucene and Solr

Apache Lucene is a high-performance, full featured text search engine library
written in Java.

Apache Solr is an enterprise search platform written using Apache Lucene.
Major features include full-text search, index replication and sharding, and
result faceting and highlighting.

## Online Documentation

This README file only contains basic setup instructions.  For more
comprehensive documentation, visit:

- Lucene: <http://lucene.apache.org/core/documentation.html>
- Solr: <http://lucene.apache.org/solr/guide/>

## Building Lucene/Solr

(You do not need to do this if you downloaded a pre-built package.)

Lucene and Solr are built using [Apache Ant](http://ant.apache.org/).  To build
Lucene and Solr, run:

`ant compile`

If you see an error about Ivy missing while invoking Ant (e.g., `.ant/lib does
not exist`), run `ant ivy-bootstrap` and retry.

Sometimes you may face issues with Ivy (e.g., an incompletely downloaded artifact).
Cleaning up the Ivy cache and retrying is a workaround for most of such issues: 

`rm -rf ~/.ivy2/cache`

The Solr server can then be packaged and prepared for startup by running the
following command from the `solr/` directory:

`ant server`

## Running Solr

After [building Solr](#building-lucene-solr), the server can be started using
the `bin/solr` control scripts.  Solr can be run in either standalone or
distributed (SolrCloud mode).

To run Solr in standalone mode, run the following command from the `solr/`
directory:

`bin/solr start`

To run Solr in SolrCloud mode, run the following command from the `solr/`
directory:

`bin/solr start -c`

The `bin/solr` control script allows heavy modification of the started Solr.
Common options are described in some detail in solr/README.txt.  For an
exhaustive treatment of options, run `bin/solr start -h` from the `solr/`
directory.

## Development/IDEs

Ant can be used to generate project files compatible with most common IDEs.
Run the ant command corresponding to your IDE of choice before attempting to
import Lucene/Solr.

- *Eclipse* - `ant eclipse`
- *IntelliJ* - `ant idea`
- *Netbeans* - `ant netbeans`

## Running Tests

The standard test suite can be run with the command:

`ant test`

Like Solr itself, the test-running can be customized or tailored in a number or
ways.  For an exhaustive discussion of the options available, run:

`ant test-help`

## Contributing

Please review the [Contributing to Solr
Guide](https://wiki.apache.org/solr/HowToContribute) for information on
contributing.

## Discussion and Support

- [Users Mailing List](http://lucene.apache.org/solr/community.html#solr-user-list-solr-userluceneapacheorg)
- [Developers Mailing List](http://lucene.apache.org/solr/community.html#developer-list-devluceneapacheorg)
- [Lucene Issue Tracker](https://issues.apache.org/jira/browse/LUCENE)
- [Solr Issue Tracker](https://issues.apache.org/jira/browse/SOLR)
- IRC: `#solr` and `#solr-dev` on freenode.net