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SOLR 500 Internal Server Error after v23.1 Update


After updating to version 23.1, some users may encounter a SOLR 500 Internal Server Error. This issue has been identified as a bug by the vendor.


The vendor has provided a workaround to address the SOLR 500 Internal Server Error. Follow the steps below to implement the workaround:

  1. Locate the solr.xml file. The default path for this file is: c:\program data\eclipse\solrsc\solr.xml.
  2. Open the solr.xml file using a text editor.
  3. Search for the following line:
   <int name="maxBooleanClauses">${solr.max.booleanClauses:1024}</int>
  1. Replace the line with the following:
   <int name="maxBooleanClauses">${solr.max.booleanClauses:50000}</int>
  1. Save the changes to the solr.xml file.
  2. Restart the “Eclipse Solr Server Management” Windows service to apply the modifications. Follow these steps to restart the service:
  • Press Win + R to open the Run dialog.
  • Type services.msc and press Enter to open the Services window.
  • Locate the “Eclipse Solr Server Management” service.
  • Right-click on the service and select “Restart.”


By modifying the maxBooleanClauses value in the solr.xml file and restarting the “Eclipse Solr Server Management” service, you can resolve the 500 Internal Server Error caused by the bug in version 23.1.

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