Debug/Diagnostic information about the application and JVM instance is published in the health check status page. In the health check status page, the following information is printed in the JSON format: MemoryOperating systemClass loadingCompilationThreadingCPU UtilizationDeployment versionStorageSamlSystem properties How to access... Continue Reading →
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 →
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 →
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 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 →
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In fastThread application, there is a 'Thread Group' section. In this section, fastThread app groups the threads with its internal algorithms. This generic grouping of threads may not suit well for few applications. Thus, we have developed this feature, which... Continue Reading →
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 →
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%