In the series of chaos engineering articles, we have been learning to simulate various performance problems. In this post, let’s discuss how to simulate ‘java.lang.OutOfMemoryError: Java Heap space’ problem. This ‘java.lang.OutOfMemoryError: Java Heap space’ will be thrown by the application when the application generates more objects than the allocated heap size.
Continue reading “Chaos Engineering – Simulating OutOfMemoryError”
JAX – Online Edition 2020 is the conference for JAVA, architecture and software innovations. This conference had 4 major workshops and nearly 20 sessions presented by many speakers from all over the world! All were performed live, carried out with the video platform and designed interactively for the developers.
Continue reading “JAX Online 2020 – Why (& How to) write memory efficient code?”
At the time (March 2020) of writing this article there are 600+ arguments that you can pass to JVM just around Garbage collection and memory. If you include other aspects, total JVM arguments count will easily cross 1000+. 😊. It’s way too many arguments for anyone to digest and comprehend. In this article, we are highlighting seven important JVM arguments that you may find it useful.
Continue reading “7 JVM arguments of Highly Effective Applications”
There are excellent Heap dump analysis tools like Eclipse MAT, Jprofiler, … These tools are handy when you want to debug/troubleshoot OutOfMemoryError. However, we HeapHero has following unique capabilities which aren’t available in those tools:
Continue reading “How is HeapHero different?”
Recently we experienced an interesting production problem. This application was running on multiple AWS EC2 instances behind Elastic Load Balancer. The application was running on GNU/Linux OS, Java 8, Tomcat 8 application server. All of sudden one of the application instances became unresponsive. All other application instances were handling the traffic properly. Whenever the HTTP request was sent to this application instance from the browser, we were getting following response to be printed on the browser.
Continue reading “TCP: out of memory — consider tuning tcp_mem”
JVM has provided helpful arguments to deal with OutOfMemoryError. In this article we would like to highlight those JVM arguments. It might come handy for you when you are troubleshooting OutOfMemoryError. Those JVM arguments are:
Continue reading “OUTOFMEMORYERROR RELATED JVM ARGUMENTS”
Troubleshooting OutOfMemoryError or any memory related problem is done in manually even in 2019. Troubleshooting and identifying the root cause of OutOfMemoryError can even be automated, by following below mentioned 3 steps:
Continue reading “AUTOMATING – OUTOFMEMORYERROR TROUBLESHOOTING”
Java.lang.VirtualMachineError is thrown when Java virtual machine encounters any internal error or resource limitation which prevents it from functioning. It’s a self-defensive mechanism employed by JVM to prevent entire application from crashing. In this article lets discuss different types of VirtualMachineError, their characteristics, reasons why they get triggered and potentials solutions to fix them.
Continue reading “VIRTUAL MACHINE ERROR”
Continuous Integration/Continuous Deployment (CI/CD) has become central to software development. To ensure high-quality software releases smoke tests, regression tests, performance tests, static code analysis & security scans are run in CI/CD pipeline. Despite of all these quality measures, still OutOfMemoryError, CPU spikes, unresponsiveness, degradation in response time are surfacing in production environment.
Continue reading “MICROMETRICS FOR CI/CD PIPELINE”
Heap Dumps are vital artifacts to diagnose memory-related problems such as memory leaks, Garbage Collection problems, and java.lang.OutOfMemoryError. Continue reading “HOW TO CAPTURE HEAP DUMP FROM ANDROID APP? – 3 OPTIONS”
