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Root cause Analysis

Known Java APIs, Unknown Performance impact! – Confoo 2023

ConFoo Montreal is a multi-technology conference for developers. This year , they have conducted the program to exchange knowledge and ideas from speakers all over the world. Our Architect Ram Lakshmanan was invited to give a talk on the topic:... Continue Reading →

Can threads execute different synchronized methods on same object?

In our earlier post, we learnt that when a method is synchronized only one thread will be allowed to enter the method. In this post, let's do a little bit of deep dive - What would happen if an object... Continue Reading →

Troubleshooting deadlock in an Apache opensource library

Apache PDFBox is a popular open-source library that facilitates java applications to work with PDF documents. Recently we encountered a Deadlock that surfaced in this library. In this post we have shared how we troubleshooted and identified the root cause... Continue Reading →

Simulating & troubleshooting deadlock in Kotlin

All multi-threaded applications are prone to deadlock. Modern Kotlin platform is no exception to it. In this post let’s discuss how to simulate a deadlock in Kotlin and how you can troubleshoot it. Video: To see the visual walk-through of... Continue Reading →

7 habits of highly effective Performance Troubleshooters! – All Day Devops Conference

The World’s Largest 6th Annual All Day DevOps conference held on October 28th 2021. Our architect Ram Lakshmanan was invited there to present a webinar on the topic 7 habits of highly effective Performance Troubleshooters! Below is the deck shared... Continue Reading →

Look for exceptions, errors in thread dumps

Thread dumps are vital artifacts to troubleshoot/debug production problems. In the past we have discussed several effective thread dump troubleshooting patterns like: traffic jam, treadmill, RSI, all roads lead to rome ………. In this article we would like to introduce... Continue Reading →

Threads throwing exception

Threads that are throwing Exception or Errors should be investigated. Because those threads stack trace indicates the origin of the problem. Below is the stack trace of the thread that is throwing java.lang.OutOfMemoryError: Thread 0x3ff781e764e0 at java.lang.OutOfMemoryError.<init>()V (OutOfMemoryError.java:48) at java.lang.ClassLoader.defineClass1(Ljava/lang/String;[BIILjava/security/ProtectionDomain;Ljava/lang/String;)Ljava/lang/Class;... Continue Reading →

THREAD DUMP ANALYSIS API

In this modern world, thread dumps are still analyzed in a tedious & manual mode i.e., you have to get hold of DevOps team, ask them to send you the thread dumps, then they will mail you the thread dumps, then you will... Continue Reading →

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