Modern web applications rely on a variety of tools for metrics collection, event logging, log aggregation, and alerting, fundamentally involving systems like Logstash and Rollbar. These tools are crucial for web development and operations teams who need to collect, analyze, and interpret data from various sources to understand system behavior. Logstash, integrated with the Kibana interface and Elasticsearch, is adept at collecting, parsing, and storing logs, converting them into JSON events, and enabling data exploration through Kibana's UI. Rollbar, on the other hand, focuses on error collection and analysis, notifying developers of application errors and aiding in debugging by providing detailed stack traces and contextual information. By integrating Logstash and Rollbar, teams can enhance error tracking and simplify debugging by centralizing logs and providing a unified context for analyzing errors. Logstash users can configure it for parsing multi-line exception messages, while Rollbar helps in automatically parsing stack traces and updating dashboards in real-time. This integration allows errors from various sources, including databases and web servers, to be collected and analyzed on a common dashboard, aiding in the identification of bugs, performance issues, or operational problems.