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Universal Java Thread Dump Analyzer

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Thread dump patterns

Harnessing Precision in Thread Dump Analysis with ‘My Patterns’

Java thread dump analysis is the art of precision—a journey that leads to uncovering the most elusive issues within your Java applications. In this world of intricate threads and complex code, fastThread's 'My Patterns' feature shines as your friendly companion.... Continue Reading →

How to capture and analyze Thread dumps in Android?

Discover the power of thread dumps in Android development. Learn what thread dumps are, how to capture them using commands like 'dumpsys thread' and 'jstack,' and uncover the insights they offer. Explore the effectiveness of 'fastThread,' a user-friendly tool that... 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 →

Problem prone classes/methods

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THREAD DUMP ANALYSIS PATTERN – ATHLETE

Description Threads in 'runnable' state consume CPU. So when you are analyzing thread dumps for high CPU consumption, threads in 'runnable' state should be thoroughly reviewed.Typically in thread dumps several threads are classified in 'RUNNABLE' state. But in reality several of them wouldn't be actually running,... Continue Reading →

THREAD DUMP ANALYSIS PATTERN –ATHEROSCLEROSIS

Description If threads are blocking momentarily, then it’s not a problem. However, if they are blocking for a prolonged period, then it’s of concern. It's indicative of some problem in the application. Typically blocked threads would make application unresponsive. Threads... Continue Reading →

THREAD DUMP ANALYSIS PATTERN – TREADMILL

Description You might have experienced the application’s CPU to spike up suddenly & spike wouldn’t go down until JVM is recycled. You restart the JVM, after certain time period CPU consumption would once again start to spike up. Then you will have to... Continue Reading →

THREAD DUMP ANALYSIS PATTERN – TRAFFIC JAM

Description Thread-A could have acquired the lock-1 and then would never release it.  Thread-B could have acquired lock-2 and waiting on this lock-1. Thread-C could be waiting to acquire lock-2. This kind of transitive blocks between threads can make entire application unresponsive. See the real-world... Continue Reading →

THREAD DUMP ANALYSIS PATTERN – REPETITIVE STRAIN INJURY (RSI)

Description When there is a performance bottleneck in the application, most of the threads will start to accumulate on that problematic bottleneck area. Those threads will have same stack trace. Thus whenever a significant number of threads exhibit identical/repetitive stack trace then those... Continue Reading →

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