Fix NullPointerException

✅ Solution

NullPointerExceptions in Elasticsearch/Lucene often arise from accessing fields or objects that haven't been initialized or are unexpectedly null. To fix this, add explicit null checks before accessing potentially null variables and provide appropriate default values or alternative execution paths when a null value is encountered. Thoroughly review the code causing the exception, paying close attention to object instantiation and data retrieval from maps, arrays, or other data structures that may contain null values.