Fix IllegalStateException

✅ Solution

IllegalStateException in Elasticsearch often arises from accessing shared resources (like indices or data structures) concurrently without proper synchronization or when attempting to perform operations on a closed or uninitialized object. To fix it, ensure proper synchronization mechanisms (e.g., locks, atomic operations) are employed when accessing shared resources concurrently, or check if the object is properly initialized and not already closed before interacting with it. Review stack traces to identify concurrent access or lifecycle issues related to object states.