Worked on the solrbot/apache-_-solr repository to enhance reliability and performance in distributed Solr environments. Developed a zombie server detection mechanism in Java, enabling CloudSolrClient and LBSolrClient to identify and avoid routing traffic to idle or unresponsive replicas, which reduced client latency and improved cloud stability. Addressed a rare deadlock and double registration issue in HttpJettySolrClient’s asynchronous request handling, increasing throughput and resilience for sharded search scenarios. Updated targeted tests to validate new error handling and idle-timeout behaviors. Focused on backend development and API design, the work strengthened Solr’s robustness for cloud deployments using Java and Solr technologies.