I have 2 Java web applications deployed on my Glassfish Enterprise Server v2.1.1. I want each of them to have different configurations for JVM options, specially for memory allocation. I have studied this document. But it contains approach for specifying JVM options at the entire server level, while I want to do the same at … Read more
I have deployed war file of my jruby application on glassfish server. i have noticed that my application becomes slow as time passes. My server is of 30GB RAM but still application is very slow. Every ruby method in my application is creating array which contains around 1 millions of records. i think creating such … Read more
I am using sqlite-jdbc 3.7.2 when i run my application, SQLLite is crashing the JVM. It is not happening consistently but it happened twice. Please help to find the issue. A fatal error has been detected by the Java Runtime Environment: SIGSEGV (0xb) at pc=0x01c60d18, pid=5731, tid=5888912 JRE version: Java(TM) SE Runtime Environment (8.0_65-b17) (build … Read more
I’d like to ask for some tips how should I concern different JAVA apps memory usage line charts. Should I find any of them as “memory leak”? How my JVM profiling impacts on GC activity? Each of them shows selected application under different load intensity and characteristic. Thank you in advance for any advice. Ubuntu … Read more
When I’m trying to install elasticsearch (Ubuntu 16.04) I get the error message: elasticsearch[15885]: * no JDK found – please set JAVA_HOME But I have only one Java and I think JAVA_HOME is set properly… $ echo $JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64 Answer This usually means when elasticsearch is starting up it cannot find the JAVA_HOME variable. You … Read more
We have a couple of critical Java Web Apps running on a bunch of Apache Tomcat 7 servers, on top of Centos 6.x. From time to time, once or twice a week, one of the Tomcat instances suddenly shuts down, with no trace, no OutOfMemory Exceptions, no other Known/Unknow exceptions are being logged. I have … Read more
Info: # of VMs= 4, each with an instance of Tomcat 8.5.* in cluster Apps = 5 war applications- 2 UI applications and 3 Webservices. Java Version = java 1.8.* Configuratin = 2 LTMS and 2 Apache Webservers – 1 LTM on top of tomcat clusters which processes Webservice requests (200K+ a day during weekdays). … Read more
We run Screenconnect at the office, or whatever connectwise calls it these days. I’m the only linux user in the office. So I just run the icedtea-netx plugin and open my sessions with the jnlp file. Recently had to reload a laptop and noticed that I can no longer open any jnlp file from our … Read more
I am running a SolrCloud on k8s with the following setting: Heap params: -server -Xms280m -Xmx312m Other params: -XX:+UseParallelGC -XX:+UseParallelOldGC -XX:+UseAdaptiveSizePolicy -XX:ParallelGCThreads=4 -XX:AdaptiveSizePolicyOutputInterval=1 -XX:MinHeapFreeRatio=20 -XX:MaxHeapFreeRatio=40 -XX:MaxGCPauseMillis=300 -XX:GCTimeRatio=19 -XX:AdaptiveSizePolicyWeight=90 -XX:MaxMetaspaceSize=128m -XX:MaxMetaspaceFreeRatio=90 -XX:MetaspaceSize=96m -XX:+ParallelRefProcEnabled And the max heap shown on the admin page is only 277.5m, which is 34.5m less than Xmx And if I change the … Read more
I will try to explain this the best I can, so here goes! I have a class that has a public static void main() method running on Tomcat JVM. Now I have another class which is basically a Thread which reads a message topic every minute. My question is how do I call the class … Read more
