When your java application is getting unresponsive or requests are taking time, taking thread dumps will help find the cause.

java jvm thread-dump debugging performance troubleshooting concurrency deadlock thread-analysis profiling enterprise-java monitoring

The purpose of this article is to explain how a kernel can invoke (out-of-memory) oom killer to kill a process abruptly which might be a java or node process of your application and what steps we can take to resolve...

java linux oom-killer kernel memory-management system-administration debugging troubleshooting process-management monitoring dmesg