Programming Issues

Issues

javax.json.bind.JsonbException: Cannot create instance of a class: class, No default constructor found.

For json binding api the default implementation is org.eclipse.yasson. The yasson code throws this exception javax.json.bind.JsonbException: Cannot create instance of a class: class com.yawintutor.Student, No default constructor found. if it can not construct a java bean class instance because no default constructor is available. The error is due to being

javax.json.bind.JsonbException: Can’t create instance

In the spring boot method, if a java object is created using a json string, the exception “javax.json.bind.JsonbException: Can’t create instance” will be thrown. Json binding is a standard that has been implemented for java as part of the JSR 367 standard. If the json binding api is unable to

JSON Binding provider org.eclipse.yasson.JsonBindingProvider not found

The exception “JSON Binding Provider org.eclipse.yasson.JsonBindingProvider not found” will be thrown at the startup of the application. Recently, JSON processing is supported in Java. JSON Binding API helps to process JSON and Java Objects. Here, we will see what this exception is. The JSON bind object is added to the

JndiDataSourceAutoConfiguration not loaded because did not find property

Auto configurations are one of the best features at spring boot. Spring boot supports auto-configured datasource. The credentials for the database are included in application.properties. Spring boot builds a datasource object dynamically from the configurations. If an error occurs in the initialization phase of the datasource, the error will be

BCryptPasswordEncoder Bad strength Spring Boot Security

In the spring boot security application, The error message “Exception in thread “main” java.lang.IllegalArgumentException: Bad strength” is seen when the application starts. The BCryptPasswordEncoder is throwing this exception as it cannot create and initialize the object. Here, we will see about this exception in this post. The spring boot security

BCryptPasswordEncoder – Empty encoded password Spring Boot Security

In spring boot security application, this error message “o.s.s.c.bcrypt.BCryptPasswordEncoder : Empty encoded password” is seen often. The user is not allowed to login to the application by security authentication failure. In this post, we will see about this warning message If users of the application attempt to login with a

Encoded password does not look like BCrypt Spring Boot Security

We’ll see a warning message “o.s.s.c.bcrypt.BCryptPasswordEncoder : Encoded password does not look like BCrypt” in the spring boot console logs. We’ll see a pattern that the user has not been able to access whatever the password entered. We’re going to see this warning message in the post. If users of

Can’t login to my custom login page in Spring Boot Security

In the spring boot security application, when we try to login to the page. It redirects back to the login page. It doesn’t matter how many times we log in, it won’t allow us to go to the next page. In this post, we’re going to see this strange behavior,

Logout is not working in Spring Boot Security CSRF enabled

IIn the spring boot application, if the security module is configured with CSRF – Cross-Site Request Forgery, all requests are verified for a CSRF attack. In this case, the logout link does not work. If the CSRF is disabled in the security configuration, the logout link will work without any

IllegalStateException: permitAll only works with HttpSecurity.authorizeRequests()

In spring boot application, The exception “IllegalStateException: permitAll only works with HttpSecurity.authorizeRequests()” is thrown if the spring security is configured. In this post, we will see how this exception is thrown and how to fix this exception. When you try to configure web security by extending the WebSecurityConfigurerAdapter class, the

Whitelabel Error Page There was an unexpected error (type=Forbidden, status=403). Access Denied

The Access denied exception There was an unexpected error (type=Forbidden, status=403). Access Denied is a common exception seen in the browser when you access the url of the spring boot application. As stated, due to the restriction of access to the url, it refuses to serve you because you do

At least one mapping is required (i.e. authorizeRequests().anyRequest().authenticated())

Spring Boot security is one of the most requested features in the application. Security controls the user access page on the basis of the configured roles. In this post, we analyze this simple exception “At least one mapping is required (i.e. authorizeRequests().anyRequest().authenticated())” and how this exception can be resolved. This

There was an unexpected error (type=Internal Server Error, status=500).

When a restful web service call is made to a Spring Boot MVC application, It shows error “Whitelabel Error Page – There was an unexpected error (type=Internal Server Error, status=500).” in the browser. The Internal Server Error is a popular error in spring boot application if a server side error

There is no PasswordEncoder mapped for the id “null”

The exception “java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id “null”” occurs if the spring boot application is enabled with security feature and password encoder is not configured for encryption. Spring boot application does not allow the password to be used as plain text. The password encoder is necessary

Using generated security password Spring Boot Security

The log “Using generated security password:” appears in the startup of the spring boot application. This log is due to default security configuration. This can be disabled, removed or customized using configurations. If the spring boot security dependency is added to pom.xml, the security authentication of the spring boot application