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.
In a previous blog, we got an overview on Elastic Stack (Elasticsearch, Logstash, Kibana, and Beets), in next blogs I will go through all these components to understand them, today we will go more in deep in Elasticsearch the heart of Elastic Stack. To really discover Elasticsearch we need to understand the below concepts and terminologies: Node Is a single…
ELK Stack or more recently called Elastic Stack, is a combination of three open-source projects: Elasticsearch, Logstash and Kibana. All these projects have been developed by Elastic and used to store, analyze, discover, and visualize data efficiently! I got the chance to install, configure and maintain Elastic Stack on Kubernetes since more than two years. Today, I would like to…
Monitoring is a crucial element of DevOps automation that has to be proactive, meaning it must find ways to improve applications quality before bugs appear. Therefore, we have to quickly and easily understand what is happening in our infrastructure, which is often more and more complex and constantly evolving. In this context, one tool stands out: Prometheus. Prometheus is an…
In a previous blog, I mentioned an issue that I faced when upgrading an Alfresco Content Services 5.2 to 6.1 on a VM with no internet access. The solution was simply to change one of the schema “URL” so that it can fallback to local references, meaning that it will try to check and find the schema definition inside the…
On an Alfresco upgrade project I was working on recently, I faced an interesting issue where post upgrade, one of my custom Share action wasn’t working anymore. This action was used to create folder links for use on an external interface. When applied on a document, it would create a link to the parent folder for example and when applied…
As already mentioned in a previous blog, ActiveMQ has been used in the scope of Alfresco since quite some time. Initially, as an optional component but then, it became mandatory. Just like for the Database, if ActiveMQ isn’t installed or not reachable, Alfresco will never completely start. Of course, for the Database, you will see that quickly since there will…
At a customer, the D2-REST (16.5.1) application hosted on WebLogic Server 12c started showing 500 Internal Server Errors, after a customer release including many things. The error was rather simple to replicate since opening the D2-REST Product info page was sufficient (https://<host>/D2-REST/product-info). The URL was returning the following: At the same time, on the logs: 2021-04-26 06:46:20,340 UTC [ERROR] ([ACTIVE]…
Have you ever faced an issue where dmqdocbroker, iapi, idql and the likes aren’t able to communicate at all with any Docbroker (connection broker)? Here, I’m not talking about potentially wrong hostname, port or connect modes, which might prevent you to reach a Docbroker if it’s not configured properly because this will still most likely reply to you with an…
As stated in Oracle’s documentation, the WebLogic Scripting Tool, or wlst for short, can be extended by adding functions in 2 non mutually exclusive places: any file located in $WL_HOME/common/wlst any file located in $WL_HOME/common/wlst/lib/ Files must have the .py extension and will be automatically loaded by wlst when it starts. In the first alternative, the script files will be…
In this article, I presented a little utility based on the SimpleHTTPServer jython module to visualize into an HTML page a WebLogic server’s configuration and run-time mbeans. I also mentioned that there are lots other tools out there for this purpose, albeit more aimed at run-time monitoring rather than viewing the configuration mbeans. Here, I’d like show another such tool,…
An interesting new project that started a few months ago is the WebLogic Remote Console. Its main advantage is that it allows to edit a domain’s configuration with no need for a running console application as it connects directly to the remote administration server. The console application does actually not need to be deployed any more, not even on demand,…
Recently I had to install Oracle Internet Directory (OID) and Oracle Access Manager (OAM) both in 12.2.1.4 on a Red Hat 8 for new QA and PRODUCTION environments. The installation of the OID 12.2.1.4 failed on packages prerequisites check. It complained about missing packages that do not exist anymore in Red Hat 8 or in Oracle Linux 8 either. Checking…
