Nexus keeps an index of all the repositories managed by it. The index is maintained as a standard Lucene index. Nexus uses the created index in order to find where the requested artifacts belong, prior to talking to a remote repository.
Note
Apache Lucene is an open source project released under Apache 2.0 License is available at http://lucene.apache.org/.
The following list shows you how to update the index of a given repository:
Go to
http://localhost:8081/nexusand log in asadmin.Navigate to Views/Repositories | Repositories and right-click on the repository you need. Then select Update Index.
To browse through the index of the selected repository, click on the Browse Index tab just below the repository list.