Error creating bean with name 'sessionBuilderCustomizer' defined in com.example.betterreadsDataloader.BetterreadsDataloader1Application - spring-boot

Question

I am creating this spring boot with Cassandra and when trying to do a connection with Cassandra I am getting this error. Please help:
org.springframework.beans.factory.BeanCreationException: Error creating bean \
with name 'sessionBuilderCustomizer' defined in \
com.example.betterreadsDataloader.BetterreadsDataloader1Application: \
Bean instantiation via factory method failed; \
nested exception is org.springframework.beans.BeanInstantiationException: \
Failed to instantiate [org.springframework.boot.autoconfigure.cassandra.CqlSessionBuilderCustomizer]: \
Factory method 'sessionBuilderCustomizer' threw exception; \
nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.0.jar:2.7.0]
at com.example.betterreadsDataloader.BetterreadsDataloader1Application.main(BetterreadsDataloader1Application.java:20) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.7.0.jar:2.7.0]
package com.example.betterreadsDataloader;
import java.nio.file.Path;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.cassandra.CqlSessionBuilderCustomizer;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import com.example.betterreadsDataloader.connection.DataStaxAstraProperties;
#SpringBootApplication
#EnableConfigurationProperties(DataStaxAstraProperties.class)
public class BetterreadsDataloader1Application {
public static void main(String[] args) {
SpringApplication.run(BetterreadsDataloader1Application.class, args);
}
#Bean
public CqlSessionBuilderCustomizer sessionBuilderCustomizer(DataStaxAstraProperties astraProperties) {
Path bundle = astraProperties.getSecureConnectBundle().toPath();
return builder -> builder.withCloudSecureConnectBundle(bundle);
}
}
package com.example.betterreadsDataloader.connection;
import java.io.File;
import org.springframework.boot.context.properties.ConfigurationProperties;
#ConfigurationProperties(prefix="datastax.astra")
public class DataStaxAstraProperties {
private File secureConnectBundle;
public File getSecureConnectBundle() {
return secureConnectBundle;
}
public void setSecureConnectBundle(File secureConnectBundle) {
this.secureConnectBundle = secureConnectBundle;
}
}
application.yml
spring:
data:
cassandra:
keyspace-name: xxx
username: xxx
password: xxxx
schema-action: create-if-not-exists
request:
timeout:10s
connection:
connect-timeout:10s
init-query-timeout:10s
datastax.astra:
secure-connect-bundle:secure-connect-booktracker.zip
astra.db:
id:xxx
region:xxx
namespace:main
application.token:xxx

Answer 1

It looks like you're doing the BetterReads coding series from Java Brains.
The NullPointerException from sessionBuilderCustomizer possibly means that it can't locate your secure connect bundle (SCB). According to Koushik's workshop, you need to place the SCB in the src/main/resources/ directory of your project.
Check that you've configured your project correctly according to the workshop then try to run the app again. Cheers!