simply about difficult
Errors of the same type look like this: Most likely this means that you have included the plugin in the pom.xml like this: The reason for the error is that the plugin version is not specified. Let’s specify, for example, 1.8: After that, you need to load changes from pom.xml to Maven and the error […]
READ MOREWe assume that openssl is already installed. User certificate with a UPN field Create a new file named ext.cnf in the folder where we are going to generate certificates. Write the line to the file: Replace text your_text_here with your own. The rest does not need to be touched. Now, you need to add a […]
READ MOREWe have a keystore with an imported certificate and we need to work with it in code. We are going to import cert into an X509Certificate class object. After that, you can work with it further, or simply display some information about it, for example: Subject X500 Principal, Issuer X500 Principal Subject DN, Issuer DN […]
READ MOREFull text of the exception in Apache Ignite: The code that uses the reentrant lock looks something like this: Check that when creating a lock, the last argument = true is passed to the reentrantLock method: If the error is still repeated, then this is a bug: https://issues.apache.org/jira/browse/IGNITE-3386. It appears when one of the server […]
READ MORESometimes disk space suddenly runs out, and you need to quickly identify the cause. Let’s find the problematic partition using the command: Output example: We are looking partitions, which 95% full or more. Use the /cd command to navigate to the folder from the corresponding “Mounted on” column. In our case it is /data folder. […]
READ MOREThe error looks like this: Stacktrace: maven-shade-plugin tries to open classes folder as zip file. This happens when one of the dependencies is found on the local filesystem and not in the local maven repository. Before unpacking, the plugin should check whether target\classes is a directory or a zip file, but it doesn’t. One solution […]
READ MORELet’s imagine that we have just installed a plugin for generating a Sitemap, check certain Sitemap URL, and received the following error: This page contains the following errors: error on line * at column *: XML declaration allowed only at the start of the document Below is a rendering of the page up to the […]
READ MOREThere are some cases when at a certain moment something breaks on the WordPress site. One of the possible reasons is a conflict of installed plugins. If we cannot disable plugins in a productive environment, it will be convenient to use the plugin (yes, another one) Health Check & Troubleshooting. It is available at https://wordpress.org/plugins/health-check. […]
READ MORESpeed check You measure the site loading time and get recommendations for speeding up using the PageSpeed Insights tool. We will look at 3 simple steps that are going to reduce the load time of your WordPress site. Async JavaScript Plugin The plugin is available at https://www.wordpress.org/plugins/async-javascript. Render-blocking Javascript prevents your content loading until the […]
READ MOREWe have two WordPress sites. Each of them includes a Gutenberg editor. One of the sites hosts a marked up article, created with blocks. The task is: transfer it to the second site, keeping the markup and block parameters. In source WordPress, click on the three dots in the upper corner of the screen, then select Copy All […]
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