Official releases are usually created when the developersfeel there are sufficient changes, improvements and bug fixes to warrant a release.Due to the voluntary nature of Solr, no releases are scheduled in advance.
Solr 8.7.0 ¶
Solr 8.7.0 is the most recent Apache Solr release.
To install Solr on your Windows system, you need to follow the steps given below − Visit the homepage of Apache Solr and click the download button. Select one of the mirrors to get an index of Apache Solr. From there download the file named Solr-6.2.0.zip. Download Solr Install and launch Solr (it comes with Jetty as the app server) This is a Java servlet, so don't expect an installer, just unzip the contents of the.zip file into a folder Use examples and docs to learn Solr. JAVA is the first requirement for Solr establishment. JAVA SE 8 or Later is required to.
Assuming you only want to install the JRE, the next consideration depends on which version of Debian you have. On Debian 8 Jessie the default JRE downloaded using the default package manager using apt-get install will download the JRE version 1.7 which is not suitable for Apache Solr 6 (and 7). On Debian 9 Stretch the default JRE is 1.8, so. What is Apache Solr? APACHE SOLR is an Open-source REST-API based search server platform written in java language by apache software foundation. Solr is highly scalable, ready to deploy, search engine that can handle large volumes of text-centric data. It is essentially an HTTP wrapper around the full-text search engine called Apache Lucene.
- Source release: solr-8.7.0-src.tgz [PGP] [SHA512]
- Binary releases: solr-8.7.0.tgz [PGP] [SHA512] / solr-8.7.0.zip [PGP] [SHA512]
Solr 7.7.3 ¶
Solr 7.7.3 is the last release in the 7.x series.
- Source release: solr-7.7.3-src.tgz [PGP] [SHA512]
- Binary releases: solr-7.7.3.tgz [PGP] [SHA512] / solr-7.7.3.zip [PGP] [SHA512]
Solr Reference Guide ¶
The Solr Reference Guide is Solr's official documentation.
Past versions ¶
Archives for all past versions of Solr are available at the Apache archives.
About downloads ¶
Verify downloads ¶
The above release files should be verified using the PGP signatures and the project release KEYS. See verification instructions for a description of using the PGP and KEYS files for verification. SHA checksums are also provided as alternative verification method.
File names ¶
The solr-VERSION.zip or solr-VERSION.tgz files (where VERSION is the version number of the release, e.g. 8.7.0) contain Apache Solr, html documentation and a tutorial.
The solr-VERSION-src.tgz file contains the full source code for that version.
About versions and support ¶
Apache Solr is under active development with frequent feature releases on the current major version. The previous major version will see occasional critical security- or bug fixes releases. 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.
| Version | Description |
|---|---|
| 8.x | Current major version for feature releases (STABLE) |
| 7.7.x | Previous major version may sometimes receive critical bugfix releases |
| 9 | Next major version, yet to be released (UNSTABLE) |
| <7.7 | All older versions are End Of Life (EOL) |
For more about versions and upgrading Solr, see the Reference Guide chapter “Upgrade Notes” and 'System Requirements'.
- Understand Java - Java provides two libraries, the full JDK or Java Development Kit and the JRE or Java Runtime Environment.
- Debian versions - Debian 8 and Debian 9 each have different versions of JRE in the stable repository.
- GUI or headless? - In a server environment, when not running in a GUI, the headless JRE offers a lighter weight installation.
- Install from jessie-backports - On Debian 8 we need to download JRE version 1.8 from jessie-backports.
- Download from Oracle Java website - Another alternative is to download and install straight from the Oracle site.
by Paul Alan Davis, CFA, September 27, 2017
Here we focus on the Java JRE for an Apache Solr installation on two versions of Debian-based Linux distributions which may be appropriate for Ubuntu as well.
~/ home / tech / solr / tutorial / install java
Installing Java for Two Versions of Debian - Jessie 8 and Stretch 9
Beginner
Apache Solr version 6, (we will install version 7 in the next tutorial) the latest version as of this writing, requires the Java Runtime Environment 1.8 (JRE) or greater.
Apache Solr in Video
How to Install Java JRE for an Apache Solr Installation (13:15)
Videos can also be accessed from our Apache Solr Search Playlist on YouTube (opens in a new browser window).
For Those Just Starting Out
Consideration 1 - Understand the Java Installation
The full blown Java Development Kit (JDK) at the time of this writing is Version 8. So you are aware and to avoid confusion, the official version number is 1.8, and people often refer to version 8 as the same thing.
The Java Development Kit (JDK)
The full Java Development Kit (JDK) includes the required Java Runtime Environment for Apache Solr. So if you install the JDK this satisfies the requirements. However, the JDK is more suited for those who want to compile their own Java programs. Also, some software requires the whole JDK, but Apache Solr does not. So you should decide whether it fits your needs to install the full JDK. Here we will focus on the JRE.
The Java Runtime Environment (JRE)
The Java Runtime Environment (JRE) on the other hand is the software required to run Java programs, in this case Apache Solr. If you would like a smaller footprint on the server then install only the JRE.
If you are unsure as to whether you have Java installed on your system you can run java -version.
As you can see, I have version 1.8, or 8, after completing the steps in this tutorial for my Debian 8 Jessie operating system.
Consideration 2 - How to install the JRE on Debian
Assuming you only want to install the JRE, the next consideration depends on which version of Debian you have. On Debian 8 Jessie the default JRE downloaded using the default package manager using apt-get install will download the JRE version 1.7 which is not suitable for Apache Solr 6 (and 7). On Debian 9 Stretch the default JRE is 1.8, so that is easy.
Debian 8 Jessie
To see this on Debian 8 Jessie, first off start with a sudo apt-get update to update the cache of all stable packages to your local system. As of the time of this writing there are about 54,000 packages.
Next, to see which JRE programs are available use apt-cache -n search jre. This will scan the 54,000 packages and where it finds jre in the name field only, specified using the -n option, it will print a match.
The packages we are interested in discussing are default-jre, default-jre-headless. Also, later we will cover the JRE version 8 which is similar to these two files openjdk-7-jre, and openjdk-7-jre-headless.
Now to learn more about any of these packages you can use the apt-cache showpkg command. So let's review the first few lines and last lines of the default-jre output using that command. The output is about 170 lines long.
Reviewing the output, we can see that the version is 1.7-52, and as mentioned for Apache Solr 6 (and 7), we need the JRE version 1.8 or greater, so on Debian 8 Jessie we will need to install a different version, which I will explain shortly.
Debian 9 Stretch
On Debian 9 Stretch, if you do an apt-cache showpkg default-jre as of the date of this document, the version number is 1.8-58, so this package will be suitable for a Solr 6 (and 7) installation. It can be installed using sudo apt-get update followed by sudo apt-get install default-jre if you are using a GUI, or sudo apt-get install default-jre-headless if you are using a headless server (see Consideration 3).
Consideration 3 - Do you want the GUI or headless version?
The next thing to consider is your environment. Are you installing the Java JRE on a machine with a GUI (graphical user interface) or on a command line only server? On the latter, you will be able to save space by installing only the components you need.
GUI environment
For a GUI environment, you will need the full version of the default-jre. So again, as mentioned earlier, if you are on Debian 9, and you want the GUI version, then install with the command sudo apt-get install default-jre.
Non-GUI server (headless) environment
If you intend to run Apache Solr on a server using the command line, then the default-jre-headless is sufficient. This will allow you to save space by installing only the portion of the JRE needed to run on a headless server.
Using apt-cache showpkg from above, here is a subset of the output.
So again, on my Debian 8 Jessie server, the default using the headless package will be 1.7, so we will need another way to get 1.8 which is the next topic.
On Debian 9 Stretch, the default-jre-headless package will install version 1.8 by default, adequate for Solr 6 (and 7).
Consideration 4 - For Debian 8 Install from jessie-backports
Now since the default-jre and default-jre-headless for Debian 8 Jessie automatically download version 1.7, we need to get version 1.8 from Jessie backports.
Debian provides information about backports at https://backports.debian.org/Instructions/ including caveats and download instructions. In summary, backports are not as fully tested by Debian and may come with incompatibilities with the stable release, so Debian provides all of the appropriate warnings.
There are two steps to download from Jessie backports.
Add link to jessie-backports
We need to point the Debian Advanced Package Tool to this new jessie-backports repository, which is not standard in a default Debian installation.
There are two ways to do this. First, we can add a line to the file /etc/apt/sources.list. Second, we can add a new file to the directory /etc/apt/sources.list.d/. Both will point the Debian Advanced Package Tool to where to find packages, meaning the commands apt-get and apt-cache both look here for the URL of where to find packages.
Using the first method, with your preferred text editor, add the following line to /etc/apt/sources.list using superuser privileges. For example, sudo vim /etc/apt/sources.list.
Save and close the file. Now when you perform an apt-get update it will access both the stable and backports repositories.
Install JRE 1.8 from jessie-backports
Next, we will install the JRE 1.8 from this newly connected jessie-backports repository. Recall that the default-jre would install version 1.7, so in order to install version 1.8, we need to instruct Debian to go to the backports and search for a different file name. The first file is openjdk-8-jre for the full GUI version and for the command line version use openjdk-8-jre-headless. As always start with an update.
Since we added another repository with the backports, the update is required to pull the list of files in the backports for Jessie. Once that is complete, we will do a sudo apt-get install with the -t option to tell Debian to get the target release, or the one specified, instead of the default. Next, we point to the jessie-backports and install two files, openjdk-8-jre-headless and ca-certificates-java.
The point of the last part ca-certificates-java has to do with verifying the download with a certificate authority. We are instructing Debian to also download the version of ca-certificates-java from the backports, which is recommended.
In my case, as I have not installed ca-certificates-java before there are two versions available. First, the older version 20140324 which would be downloaded from the Jessie stable repository and another version 20161107~bpo8+1 which is downloaded from the backports. Information on these packages can be found on the Debian Package Manager documentation located at https://packages.debian.org.
To verify that everything worked as planned, check the version number of the JRE after the installation using backports for Debian 8 Jessie.
How To Install Solr On Windows
How To Install Apache Solr On Windows 10
Again, this would be much easier using the latest version of Debian 9 Stretch, but using the backports gives you an alternative is you are using Debian 8 Jessie, like I am here.
Download and Install from the Oracle Website
The fifth consideration, and an alternative to using the Debian package manager, is to download files straight from Oracle at http://www.oracle.com/technetwork/java/javase/downloads/index.html.
Read appropriate documentation on the Oracle website for installation instructions, as it is beyond our scope here.
Now you should have version 1.8 of the JRE installed on your system, whether that be on Debian 8 Jessie or Debian 9 Stretch. You are ready for the installation of Apache Solr 6 (and 7).
Certain aspects of Apache Solr are tricky so if you need help with this please feel free to reach out on social media, including at our FactorPad YouTube Channel.
Related Solr Reference Material
Questions and Answers
Q: Will this work with Ubuntu?
A: You will have to check yourself, but because Ubuntu is an offshoot of Debian and uses the Advanced Packaging Tool much of the functions described here will likely work with Ubuntu as well.
What's Next?
Our YouTube Channel offers a lot of free learning resources. Subscribe straight from here and see what else is available.
- To see the current list of Solr tutorials, click Outline.
- To learn more about our Solr resources, click Back.
- To dive right in and install Solr, click Next.
Installing Apache Solr On Windows
~/ home / tech / solr / tutorial / install java