求助：Solr 8.0安装TermVectors补丁及解决tvrh参数问题

Hey Alex, I’ve been in your shoes before—getting stuck on missing parameters in Solr can be frustrating. Let’s break down exactly how to apply that SOLR-949 patch so you can fetch TermVectors using the tvrh parameter in your code. Here’s a step-by-step guide:

Prerequisites First #

Make sure you have these tools ready:

• Git (to apply the patch easily)
• JDK 8+ (Solr 8.0 requires Java 8)
• The Solr 8.0 source code (we’ll need to build it after patching)

Step 1: Grab the Solr 8.0 Source Code #

If you don’t already have the source, clone the Apache Solr repo and switch to the 8.0.0 tag:

git clone https://github.com/apache/solr.git
cd solr
git checkout tags/solr-8.0.0

Step 2: Download the SOLR-949 Patch #

Head to the SOLR-949 issue page, locate the patch attachment (it’ll be a .patch file), and save it to your local machine—note the file path (e.g., ~/downloads/SOLR-949.patch).

Step 3: Apply the Patch #

Navigate back to your Solr source root directory and run:

git apply ~/downloads/SOLR-949.patch

If you run into any conflicts (unlikely for a patch targeted at 8.0), you’ll need to manually edit the conflicting files to resolve them. Alternatively, you can use the patch command if git apply doesn’t work:

patch -p1 < ~/downloads/SOLR-949.patch

Step 4: Rebuild Solr from Source #

Solr uses Gradle for builds, so run this command to compile and package the patched version:

./gradlew assemble

This will generate the full Solr distribution package (a .tar.gz or .zip file) in the solr/build/distributions/ directory.

Step 5: Replace Your Existing Solr Deployment #

• Stop your running Solr instance first.
• Back up your current Solr installation directory and data folder (always a smart move before making changes!).
• Extract the newly built distribution package and replace your old Solr files with the patched ones.
• If you’re running SolrCloud, make sure to update all nodes with the patched version.

Step 6: Test the Patch #

Start Solr back up, then update your code to use the tvrh parameter in SolrQuery:

SolrQuery query = new SolrQuery("your-search-query");
// Enable TermVectors for all fields, or specify specific fields like "title,content"
query.set("tvrh", "true");

QueryResponse response = solrClient.query(query);
// Retrieve the TermVectors results
Map<String, TermVectorResponse> termVectors = response.getTermVectors();

Run your code and verify that you’re now able to fetch the TermVectors data successfully.

Quick Notes #

• If you don’t want to rebuild the entire distribution, you can locate the specific jar file modified by the patch (usually solr-core-x.x.x.jar) and replace just that in your existing installation—though full replacement is more reliable.
• Keep backups handy so you can roll back if anything goes wrong during the process.

内容的提问来源于stack exchange，提问作者Alex