76babf876a
There are 3 tightly related bug fixes in these changes: 1) ConcurrentModificationExceptions were being thrown by some SimClusterStateProvider methods when creating collections/replicas due to the use of ArrayLists nodeReplicaMap. These ArrayLists were changed to use synchronizedList wrappers. 2) The Exceptions from #1 were being swallowed/hidden by code using SimCloudManager.submit() w/o checking the result of the resulting Future object. (As a result, tests waiting for a particular ClusterShape would timeout regardless of how long they waited.) To protect against "silent" failures like this, this SimCloudManager.submit() has been updated to wrap all input Callables such that any uncaught errors will be logged and "counted." SimSolrCloudTestCase will ensure a suite level failure if any such failures are counted. 3) The changes in #2 exposed additional concurrency problems with the Callables involved in leader election: These would frequently throw IllegalStateExceptions due to assumptions about the state/existence of replicas when the Callables were created vs when they were later run -- notably a Callable may have been created that held a reference to a Slice, but by the time that Callable was run the collection (or a node, etc...) refered to by that Slice may have been deleted. While fixing this, the leader election logic was also cleaned up such that adding a replica only triggers leader election for that shard, not every shard in the collection. While auditing this code, cleanup was also done to ensure all usage of SimClusterStateProvider.lock was also cleaned up to remove all risky points where an exception may have been possible after aquiring the lock but before the try/finally that ensured it would be unlocked. |
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dev-tools | ||
lucene | ||
solr | ||
.gitignore | ||
.hgignore | ||
README.md | ||
build.xml |
README.md
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:
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. 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, 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
(See this for details) - IntelliJ -
ant idea
(See this for details) - Netbeans -
ant netbeans
(See this for details)
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 for information on contributing.
Discussion and Support
- Users Mailing List
- Developers Mailing List
- Lucene Issue Tracker
- Solr Issue Tracker
- IRC:
#solr
and#solr-dev
on freenode.net