This failure was cached in the local repository and resolution is not reattempted until the update interval of central has elapsed or updates are forced

When we build a maven project, we might encounter a very common Maven cached error, due to that our build is getting failed. This is caused by Maven’s default update policy. With respect to fixing this error, er have to run the "mvn install" command in forcefully update mode.


To bypass this default restriction, you can do the following:

•     add the -U flag to the maven install command, or
•    configure your Maven clients’ settings.xml file with the following value <updatePolicy>always</updatePolicy>. Below is the sample settings.xml file.

<settings xmlns="https://maven.apache.org/SETTINGS/1.0.0"
  xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="https://maven.apache.org/SETTINGS/1.0.0
                      https://maven.apache.org/xsd/settings-1.0.0.xsd">
<profiles>
 <!-- ====================================================== -->
 <!-- A D O B E   P U B L I C   P R O F I L E                -->
 <!-- ====================================================== -->
     <profile>
         <id>adobe-public</id>
         <activation>
             <activeByDefault>true</activeByDefault>
         </activation>
         <properties>
             <releaseRepository-Id>adobe-public-releases</releaseRepository-Id>
             <releaseRepository-Name>Adobe Public Releases</releaseRepository-Name>
             <releaseRepository-URL>https://repo.adobe.com/nexus/content/groups/public</releaseRepository-URL>
         </properties>
         <repositories>
             <repository>
                 <id>adobe-public-releases</id>
                 <name>Adobe Public Repository</name>
                 <url>https://repo.adobe.com/nexus/content/groups/public</url>
                 <releases>
                     <enabled>true</enabled>
                     <updatePolicy>never</updatePolicy>
                 </releases>
                 <snapshots>
                     <enabled>false</enabled>
                 </snapshots>
             </repository>
         </repositories>
         <pluginRepositories>
             <pluginRepository>
                 <id>adobe-public-releases</id>
                 <name>Adobe Public Repository</name>
                 <url>https://repo.adobe.com/nexus/content/groups/public</url>
                 <releases>
                     <enabled>true</enabled>
                     <updatePolicy>always</updatePolicy>
                 </releases>
                 <snapshots>
                     <enabled>false</enabled>
                 </snapshots>
             </pluginRepository>
         </pluginRepositories>
     </profile>
</profiles>
 <activeProfiles>
     <activeProfile>adobe-public</activeProfile>
 </activeProfiles>
</settings>

View the contrast ratio of a text element with Color Picker in Chrome developer tool

The contrast ratio is a color property of a display system, that defined as the ratio of the luminance of the brightest shade to that of the darkest shade that the system is capable of producing. In the web world example, a text is written on top of any background(background could be either color or an image).

The contrast ratio is very important for accessibility. Some people with low vision do not see areas as very bright or very dark. Everything tends to appear at about the same brightness, which makes it hard to distinguish outlines and edges. The Contrast ratio measures the difference in brightness between the foreground and background of the text. If a text has a low contrast ratio, then these low vision users may literally experience the site as a blank screen, and can not read the text that is written on web page.

Chrome Color Picker

Google Chrome developer tool is very helpful to investigate and fix the contrast ratio on a web page using the color picker option of style. The Color Picker can help you make sure that the text meets recommended contrast ratio levels:

1. Open the developer tool in the Chrome browser. (using option right click on page > inspect or pressing F12 button)

2. Click the Elements tab in developer tool.

3. In the DOM Tree, select the text element that you want to inspect.

4. In the Styles pane, click the color square next to the element's color value.

Color Picker option in Chrome dev tool

5. Check the Contrast Ratio section of the Color Picker. One checkmark means that the element meets the minimum recommendation. Two checkmarks mean that it meets the enhanced recommendation. 

Incomplete contrast ratio

6. Click the Contrast Ratio section to see more information. A line appears in the visual picker at the top of the Color Picker. If the current color meets recommendations, then anything on the same side of the line also meets recommendations. If the current color does not meet recommendations, then anything on the same side also does not meet recommendations.

Correct contrast ratio 4.5:1

This is how we fix the contrast ratio issue for low vision people and make a web page accessible for all human beings. Hope this helps you to debug the accessibility issue related to the contrast ratio. please feel free to let us know your experience and if you know any other way to debug and fix the contrast ratio on a web page. Thank you!

References:

1. Ensuring that a contrast ratio of at least 4.5:1 exists between text and background

2. Accessibility features reference

What is the difference between first and second dose of COVID19 vaccine ?

 There is no difference in the first and second dose, a person has to just ensure while taking the second dose that the manufacturer and vaccine are the same as he/she taken in the first dose.

Side effect of Covid19 vaccine

There are few temporary side effects of Covid19 vaccines. Below are the reported reactions to the Covid19 vaccines:

• Injection site discomfort, such as pain, swelling, redness, or bruising
• Muscle pain
• Joint pain
• Headache
• Fatigue
• Chills
• Fever
• Lymph node swelling

If you experience any such side effects, please dont take any medicine and contact nearby hospital for prescription.

References

1. Is there any difference between 1st and 2nd dose?
2. COVID-19 Vaccines That Require 2 Shots
3. COVID-19 Vaccine: What You Need to Know About the Second Dose