Chapter 5. Troubleshooting

You must have faced a number of problems while playing around with Solr's deployment, irrespective of whether the deployment is simple or complex, or whether you are working on a single Solr instance or multiple servers or shards.

In this chapter, we will learn how to troubleshoot a list of the most common problems you are prone to facing while you are still in the Solr playground, and will cover the following topics:

• Dealing with the corrupt index

• Reducing the file count in the index

• Dealing with the locked index

• Truncating the index size

• Dealing with a huge count of open files

• Dealing with out-of-memory issues

• Dealing with an infinite loop exception in shards

• Dealing with expensive garbage collection

• Bulk updating a single field without full indexation

So, let us get started.