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Graph/missing-service-provider-registration

Pattern

Missing Java Service Provider

missing-service-provider-registration

Annotation processors fail to load because the META-INF/services/javax.annotation.processing.Processor registration file is missing, so discovery never happens and expected compile-time generation/behavior silently disappears.

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Updated7/7/2026

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30 linked nodes

Exceptions in nifi-app.log that occur only in the top-right corner of the processor are not being captured, and the user wants to send Sentry notifications from NiFi logs with LogMessage(level: error). Adding the Sentry logback configuration fails with ClassNotFoundException for io.sentry.logback.SentryAppender, and adding the Sentry JAR to NiFi/lib causes a NullPointerException during NiFi startup.

trying to perform data processing during the application's startup. Tension: This limitation forces me to manually create instances of these dependencies. Outcome: this approach doesn't work as expected.

FATAL ERROR in native method: JDWP ExceptionOccurred, jvmtiError=AGENT_ERROR_INVALID_EVENT_TYPE(204) — When using intellij to start tomcat WITHOUT connecting the debugger there's no problems. Tension: JDWP exit error AGENT_ERROR_INVALID_EVENT_TYPE(204): ExceptionOccurred.

This method cannot decide whether these patterns are Spring MVC patterns or not. — After upgrading from Spring Security 5.8.2 to 5.8.6, I am having an issue with my deployment on JBoss EAP 7.4 (it works fine on embedded Tomcat). Tension: This is because there is more than one mappable servlet in your servlet context. Outcome: How can I solve the problem?

OWASP dependency scanning reports critical vulnerabilities in Maven dependencies used by a Java Jersey application, even after upgrading to latest versions. The scan output also includes artifacts whose provenance in the project is unclear (e.g., kerb-server).

"No AuthenticationProvider found for org.springframework.security.authentication.UsernamePasswordAuthenticationToken" — upon when i try login using the form. Tension: I thought by default, DaoAuthenticationProvider will be instantiated by Spring Boot and it will auto pick up whatever custom UserDetailsService bean and PasswordEncoder bean we configured. Outcome: I missed to annotate customservicedetails with @Service Annotation. After it worked!

java.lang.IllegalArgumentException: Not supported: http://javax.xml.XMLConstants/property/accessExternalDTD — when I deployed the code on a running instance. Tension: JUnit testing was a success, but, when I deployed the code on a running instance, I got this error. Outcome: this another implementation worked for me.

After migrating to Spring Boot 4, custom Jackson 2 serialization/deserialization code stopped being executed because Spring was not using Jackson 2 as the preferred JSON mapper.

javax.lang.model.element.UnknownElementException: Unknown element: "params" — using the javax.tools.DocumentationTool to parse the Documentation of my source code base. Tension: The stack trace as can be seen is when the record Component is visited. Outcome: It is triggering an javax.lang.model.element.UnknownElementException exception when a record method parameter.

Gradle builds the project, but the annotation processor does not run

Now the .WAR can be deployed under Tomcat, but I still can't run it with `java -jar`. The error message is: java.lang.ClassNotFoundException: My.App. — the compiled class of My.App was put in a .JAR (under WEB-INF/lib where all the other dependencies are located). Tension: instead of putting it under WEB-INF/classes. Outcome: This is a Proof of Concept (PoC) test.

IntelliJ IDEA fails to compile/run Java programs using JDK 8 and reports: "java: invalid flag: --add-modules".

Exception in thread "main" java.lang.IllegalStateException: java.lang.NoSuchMethodError: 'void org.springframework.data.jpa.repository.config.JpaRepositoryConfigExtension.registerLazyIfNotAlreadyRegistered. Tension: I am trying to do a sample microservice which involves pulling data from multiple databases.

the compile was failing on `getSystemService(Context.CUSTOM_SERVICE)` call which did not find the `Context.CUSTOM_SERVICE` symbol — custom framework that has new system service with a `CustomServiceManager`. Tension: android.jar comes first — so its definitions win. Outcome: Android Studio detect the `Context.CUSTOM_SERVICE` as an error, but the code is compiled without any error.

IntelliJ compiles and runs this code without error — in IntelliJ. Tension: According to the OCP Java 17 certification guide, "A single underscore _ is not allowed as an identifier.". Outcome: The code would not compile in Java 17.

if the `userService` field is removed, the dependency is set to null, which causes a `NullPointerException` when the test runs — In my Spring Boot app, I have some tests that look like this. Tension: I don't need to mock or verify any `userService` methods, so IntelliJ marks this as an unused field.

What are ways to systematically find all modules of the JDK that will be/have been used during the runtime of a Java application through reflection and the service provider model? — through reflection and the service provider model. Tension: I am, to my understanding, not looking for the jdeps command unless someone has a particular set of arguments that can resolve reflected runtime-only dynamic dependencies. Outcome: I already understand there is the `jlinks --suggest-providers` option, but this requires knowledge of each provider that is lacking.

When I include the Kafka producer logic in my service, the overall performance drops drastically. — using Java Spring Boot with Apache Kafka. Tension: But when I comment out the Kafka producer code, the processing becomes very fast.

Cannot run program "mvn": CreateProcess error=2, The system cannot find the file specified — ProcessBuilder processBuilder = new ProcessBuilder("mvn", "quarkus:dependency-tree");. Tension: results in.

When running the packaged fat JAR with `java -jar`, Log4J fails to find/initialize its implementation (e.g., Log4j core), so logging does not work. The build produces a single JAR that should include all dependencies.

when using Spring AOP to proxy a `HelloService` bean in combination with a custom `BeanPostProcessor` (`MyPostProcessor`) and a `FactoryBean` (`MyFactoryBean`). Outcome: the `@AfterReturning` advice in `MyAspect` is not invoked.

java: variable restClient not initialized in the default constructor — running my project as a unit test configuration in IntelliJ. Tension: However, the same tests work fine when I run `mvn test` from the terminal. Outcome: Changing Annotation profile from using Processor path To using Obtain processor from project classpath.

Could not find or load main class Caused by: java.lang.ClassNotFoundException with jpackage — trying to build a standalone kotlin - compose - spring app.

IntelliJ doesn't generate a mapper when I save files. Tension: In Eclipse, when I modify a Mapstruct mapper Interface and save it, the IDE generates the related implementation immediately. Outcome: I must perform a mvn `mvn generate-sources` or a `clean install` to do the same.

Apex Language Server cannot be communicated with from raw Java code

the second command fails instantly with the following error — java -jar jcstress-samples/target/jcstress.jar. Outcome: After explicitly enabling the annotation processing like this, the issue was resolved.

java.lang.NoSuchFieldError: Class org.springframework.util.SystemPropertyUtils does not have member field 'java.lang.Character ESCAPE_CHARACTER' — at org.springframework.boot.context.properties.bind.PropertySourcesPlaceholdersResolver. Tension: conflict between dependency that include in 3.4.x. Outcome: After remove this row it run perfectly.

SLF4J: No SLF4J providers were found. — When I run a simple main class with random log. Tension: Defaulting to no-operation (NOP) logger implementation. Outcome: logback-classic.jar is the slf4j provider not logback-core.jar.

When running "./mvnw clean package" I get the error: `cannot find symbol`. — I use Lombok in my Spring project. Tension: This works inside of the IDE, but it fails outside of it. Outcome: How can I trigger the creation of the generated sources for Lombok before packaging?

Failed to register 'filter xssFilter' on the servlet context. — when I include both @Component and @WebFilter. Tension: Possibly already registered? Outcome: When I remove @Component and only use @WebFilter, the program runs normally.

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