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Universal Java Thread Dump Analyzer

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thread dumps

What is Garbage collection log, Thread dump, Heap dump?

Java Virtual Machine (JVM) generates 3 critical artifacts that are useful for optimizing the performance and troubleshooting production problems. Those artifacts are: Garbage collection (GC) logThread DumpHeap Dump In this article let us try to understand these 3 critical artifacts,... Continue Reading →

Thread states

To troubleshoot a production problem, you might have to analyze multiple snapshots of thread dumps captured at periodic intervals. Each snapshot of thread tends to contain hundreds of threads, sometimes even thousands of threads. Each thread in the thread dump... Continue Reading →

Flame Graph from Java thread dump

Thread dumps are vital artifacts to debug & troubleshoot production performance problems. Thread dump files tend to span for several hundreds of lines (sometimes a few thousands of lines). It is hard to conceive and assimilate all the information in... 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 →

Search Thread dumps

When there are several hundreds or thousands of threads in the thread dump, the user might want to search threads based on thread name, thread Id, stack trace … Here are a few sample cases: Find all the threads which... Continue Reading →

Troubleshooting CPU spike in a Major Trading Application

we troubleshooted a CPU spike problem that surfaced in a major trading application in North America. All of a sudden, this application’s CPU started to spike up to 100%

HOW TO IDENTIFY CRITICAL CODE PATH?

Before answering the question 'How to identify critical code path?’ let me answer 'Why identify critical code path?’ Why identify critical code path? There are a couple of answers to it: Performance OptimizationAccurate Smoke Test Performance Optimization  In most applications,... Continue Reading →

HOW TO ANALYZE THREAD DUMPS?

In this modern world, thread dumps are still analyzed in a tedious & manual mode. There is no programmatic way to analyze thread dumps in a proactive manner. Thus to eliminate this hassle, fastthread.io has been introduced to troubleshoot complex production problems. fastThread is a... Continue Reading →

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