Middleware is where applications meet infrastructure. Here our consultants write about WebLogic, JBoss EAP, WildFly and Tomcat in real production environments: installing and clustering them, patching, deploying applications and finding out why something stopped working.
Unless the servers in cluster are not symmetric, which is not recommended anyway, dynamic cluster have many advantages against configured cluster:
Ensure Cluster Member Uniformity
Easily add new servers to manage more traffic
Automatically adapt to load to add/remove managed servers
Can still contain configured servers even if not recommended as for point 1
Configure a Policy-action (new name for watch-notification) to send a JMX notification when the monitored WebLogic Server is having stuck threads or high memory usage. We will use a simple JMX notification listener program which can process WLDF JMX notifications. In this case, it will simply print the contents of the notification. For simplicity, we will have only two servers…
It was a long time that I wrote my last blog. Lots of customer activities and I had no time to write one. With the acquired knowledges, it’s time to write more blogs and share knowledge, don’t you think ? Let’s begin with an easy one. During customer activity when upgrading a complex Fusion Middleware Platform, it was asked to…
After patching our D2 we ran into an error we never had before. After all, it’s only a patch. But as you know, patching D2 means recreating the war file and deploying it again. As well as setting up again all the customs you made… Well this time we had a popup when accessing the D2 interface, which said “Error…
When installing D2 and launching the tomcat server you can have an error on a missing lib: JSAFE_SecureRandom. Here’s the trace you can have: 2018-01-17 17:32:19 [DEBUG] [localhost-startStop-1] – c.e.c.d.contents.D2FileCleaningTracker : Init D2FileCleaningTracker with /pkgs/dms-tomcat/D2_TOMCAT_HOME/temp/D2FileCleaningTracker_D2.ser 2018-01-17 17:32:20 [ERROR] [localhost-startStop-1] – c.emc.d2fs.dctm.servlets.D2HttpServlet : LoadOnStartup – java.lang.NoClassDefFoundError: com/rsa/jsafe/JSAFE_SecureRandom 2018-01-17 17:32:20 [ERROR] [localhost-startStop-1] – c.emc.d2fs.dctm.servlets.D2HttpServlet : {} java.lang.NoClassDefFoundError: com/rsa/jsafe/JSAFE_SecureRandom at com.documentum.fc.client.security.impl.InitializeKeystoreForDfc.execute(InitializeKeystoreForDfc.java:46) [dfc.jar:na] at…
Some time ago, we were installing a Migration Center (from fmeAG) on a Windows Server and at the end of the installation, the service named Migration Center Job Server is configured and finally started. Unfortunately this didn’t go well and the start command wasn’t working at all. We were using a dedicated technical account (AD account) to do the installation…
Last year, we started to upgrade some Documentum Administrator from 7.2 to 7.3 and directly after, we started to see some NullPointerException on the log files. We are using DA 7.3 on some recent WebLogic Servers versions (12.1.3, 12.2.1.2). We usually deploy DA as a WAR file (so not exploded) with just the dfc.properties, keystores and logs outside of it.…
This blog will be the last of my series around the WebLogic SSO (how to enable logs, 403 N°1, 403 N°2) which I started some weeks ago. Several months ago on a newly built High Availability Environment (2 WebLogic Servers behind a Load Balancer), an application team was deploying their D2 Client as always. After the deployment, it appeared to…
Today is the second day of the Alfresco DevCon 2018 and therefore yes, it is already over, unfortunately. In this blog, I will be continuing my previous one with sessions I attended on the afternoon of the day-1 as well as day-2. There were too many interesting sessions and I don’t really have the time to talk about all of…
Here we are, the Alfresco DevCon 2018 day-1 is over (well except for the social party)! It’s been already 2 years I attended my last Alfresco event (BeeCon 2016, first of its name (organized by the Order of the Bee)) because I wasn’t able to attend the second BeeCon (2017) since it happened on the exact dates of our internal…
When playing with the AOS implementation, a colleague of mine faced an interesting issue where he just wasn’t able to move or rename any files or folders. The creation and deletion were working properly but he was unable to move or rename anything when using a Network Location or a Network Drive. This environment was freshly installed with a front-end…
Earlier today, I posted another blog with almost the same title but the similarities stop here. The thing is that when you access your application, there aren’t much error codes possible so if there is an issue, it’s often the same generic message that is being displayed on the browser. To get some background on the issue that I will…
