Not all stories need to be success stories. Reality is also not like that. We would like to share a true, disappointing story (but a phenomenal learning experience) that may be beneficial to you.
Continue reading “DISAPPOINTING STORY ON MEMORY OPTIMIZATION”
There are 8 types of OutOfMemoryError. In this, 5 types of OutOfMemoryError happens within the JVM heap. Continue reading “DIAGNOSE MEMORY LEAK”
Your Java application has been running fine, but all of a sudden CPU consumption starts to go higher and higher until it stays at 80 – 100%. Even if you remove the server from load balancer (so that traffic isn’t sent anymore), still the CPU consumption is maxed out. The only way to recover from this problem is to recycle the application. After recycling, the application might be running fine for a few hours (or a few minutes depending on your karma :-)) before the CPU consumption starts to spike up.
Continue reading “HOW TO TROUBLESHOOT SUDDEN CPU SPIKES?”
Is your JVM experiencing Repeated Full GCs? Are you wondering what might have caused it? Are you struggling to fix it? Then you are reading right article.
Continue reading “REPEATED FULL GC”
I was surprised to witness the Java Executor behavior, which caused “java.lang.OutOfMemoryError: unable to create new native thread” in our application. I would like to share my surprise (i.e. problem) and resolution to it.
Continue reading “MEMORY LEAK IN JAVA EXECUTOR!”
Heap dump is a snapshot of the Java memory. It contains information about the Java objects and classes in the heap at the moment the snapshot is triggered. It’s vital artifact to diagnose any Java memory related problems.
Continue reading “HOW TO CAPTURE HEAP DUMP? – JMAP, – XX:+HEAPDUMPONOUTOFMEMORYERROR”