Oracle Architect optimizes performance using GCeasy

Prabhakar Jonnalagadda is the performance architect in Oracle. He was presented with a performance problem of an application which had following symptoms: + Frequent unavailability of the application (crash issues) + Significant degraded performance in repeated spells In this post he talks about how he solved this application's performance problems. He basically analyzes the GC... Continue Reading →

Troubleshooting Microservice’s OutOfMemoryError: Metaspace

Recently we confronted an interesting 'java.lang.OutOfMemoryError: Metaspace' problem in a Microservice application. This Microservice application will run smoothly for initial few hours, later it will start to throw java.lang.OutOfMemoryError: Metaspace. In this post let me share the steps we pursued to troubleshoot this problem. Different types of OutOfMemoryError JVM memory has following regions:  a. Young... Continue Reading →

Troubleshooting HTTP 502 bad gateway in AWS EBS 

The application that we are going to discuss in this post was running on Elastic Beanstalk (EBS) service in Amazon Web Services (AWS). Intermittently this application was throwing HTTP 502 Bad Gateway error. In this post, let’s discuss how we troubleshooted and resolved this HTTP 502 bad gateway error in Elastic Beanstalk service. Video: To... Continue Reading →

Memory leak due to improper exception handling

In this post let's discuss an interesting memory problem we confronted in the production environment and how we went about solving it. This application would take traffic for a few hours after that it would become unresponsive. It wasn't clear what was causing the unresponsiveness in the application. Memory leak issues due to improper exception... Continue Reading →

Spring Boot pet clinic app – performance study

Spring pet clinic application is a sample application developed by the Spring Framework developers to demonstrate the capabilities of Spring Boot, Spring MVC and Spring Data Framework. We set out to conduct a performance test on this application and see whether we can identify any performance bottlenecks. Environment Setup We cloned the Spring pet clinic... Continue Reading →

AWS Cloud watch + yCrash = Monitoring + RCA

We had an outage in our online application GCeasy on Monday morning (PST) Oct' 11, 2021. When customers uploaded their Garbage Collection logs for analysis, the application was returning HTTP 504 error. HTTP 504 status code indicates that transactions are timing out. In this post, we would like to document our journey to identify the... Continue Reading →

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