When your Solr-powered app says “the file’s too big” or “too many boolean clauses!”—don’t panic. Here’s how to tweak your solrconfig.xml so you can upload more, search harder, and (almost) never hit a wall.
The key setting: formdataUploadLimitInKB in your solrconfig.xml file.
Open your Opensolr Index Control Panel:
https://opensolr.com/admin/solr_manager/tools/INDEX_NAME
Navigate to the Config Files Editor tab.
Select solrconfig.xml.
Look for the <requestDispatcher> directive.
Example:
xml
<requestDispatcher handleSelect="false"
multipartUploadLimitInKB="2048000"
formdataUploadLimitInKB="2048" />
multipartUploadLimitInKB – For files uploaded via multipart POST.formdataUploadLimitInKB – For files uploaded as form data.
Increase the value as needed.
Warning: Don’t make it TOO big—your JVM heap and security folks will not thank you.
No matter how big you set those upload limits, if your query contains too many boolean clauses (lots of OR or AND), Solr will throw a “too many boolean clauses” error.
Solution:
Increase maxBooleanClauses in your solrconfig.xml:
<maxBooleanClauses>2048</maxBooleanClauses>
If you’re hitting the limit even after increasing it, consider splitting your mega-query into several smaller queries and combining results in your app (think of it as Solr-powered pagination, but for logic!).
https://opensolr-server.solrcluster.com/solr/production/select?q=*:*&fq=field_name:(VAL1 OR ... OR VALn)https://opensolr-server.solrcluster.com/solr/production/select?q=*:*&fq=field_name:(VALn+1 OR ... OR VALm)Where n and m are each less than your maxBooleanClauses setting.
If you’re running Opensolr with a Resilient Cluster Solution, you get: - Load balancing for multiple simultaneous queries - Better resiliency - Much faster response times!
Pro Tip:
Remember to always back up your config before making changes. Solr has a sense of humor, but only if you do, too. 😄
