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Graph/95299ead-4701-43a0-8642-21e433fce030

Domainunvalidated

Spring Boot

95299ead-4701-43a0-8642-21e433fce030

Spring Boot

Node Details

Public graph metadata

Updated5/1/2026

PageRank0.0004

Effectiveness0.000

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18 linked nodes

IMPLEMENTATION_OFComponent

PERTAIN_TOSolution

Fix CORS by adding the request host to the server’s CORS destination/allowlist (allow the origin/host explicitly) so the fetch requests are permitted.

PERTAIN_TOSolution

annotate fields(ex: id) with `sequenceGenerator` not the Entity or class — @Entity @Table(name = "ENTITY") public class ENTITY extends PanacheEntityBase. Tension: those values are inconsistent. Outcome: @Id @SequenceGenerator(name = "ID_SEQ", sequenceName = "ID_SEQ", allocationSize =100) public Integer id;.

PERTAIN_TOProblem

String value length (20048537) exceeds the maximum allowed (20000000, from StreamReadConstraints.getMaxStringLength()) — Spring Boot application where I'm trying to upload files or large content through a REST endpoint. Tension: the request is being rejected by Spring Boot. Outcome: Once I stopped sending the file in JSON, the problem disappeared.

PERTAIN_TOSolution

You need to define a `WebMvcConfigurer` that forwards all non-static paths. Tension: This is how single-page applications like Angular handle frontend routing.

PERTAIN_TOProblem

it returns either an error or an empty string (just empty) to the console — when requesting from the frontend to the server. Tension: if you disable Cors in fetch(mode: "no-cors").

PERTAIN_TOProblem

there is some requirement where in particular 2-3 APIs, I dont want this prefix to come — We have used MappingJackson2HttpMessageConverter -> JsonPrefix to attach some prefix. Tension: This works corrects and provides response as expected. Outcome: So is there any way to achieve the same?

PERTAIN_TOSolution

You could implement a custom converter which takes a request object & maintain list of `requestUri`s — where you don't want to include the prefix. Tension: You can also make this class as a `@Component` & import the list of excluded APIs from the properties. Outcome: if (!excludedApis.contains(request.getRequestURI())) { StreamUtils.copy(")]}',\n".getBytes(StandardCharsets.UTF_8), outputMessage.getBody()); }.

PERTAIN_TOProblem

Basic collection has element type 'uk.ac.rhul.cs2800.model.Grade' which is not a known basic type

PERTAIN_TOSolution

Place all JPA annotations on the same access level, either field level or method level

PERTAIN_TOProblem

updated from Spring Boot 3.3.6 to version 3.4.0. Tension: musterMetadatenRepository.saveAndFlush(musterEntity); // crashes here. Outcome: org.springframework.orm.ObjectOptimisticLockingFailureException: Row was updated or deleted by another transaction.

PERTAIN_TOProblem

Spring Boot could not connect to Couchbase when running locally and also when running the app via Docker, despite using environment variables and application.yml to configure the connection (host, credentials, bucket).

PERTAIN_TOSolution

Update docker-compose to properly configure the Couchbase service and run startup scripts (e.g., setup-couchbase.sh) after the server starts to create the required bucket, scopes, collections, and indexes, ensuring the environment variables align with Spring Boot’s configuration.

PERTAIN_TOProblem

Accessing the springdoc Swagger UI endpoint (e.g., localhost/.../swagger-ui/index.html or /swagger-ui.html) returns 401 Unauthorized when spring-boot-actuator and springdoc-openapi-ui are used together with spring-boot-starter-security.

PERTAIN_TOSolution

Configure Spring Security to ignore (bypass) the swagger-ui and api-docs endpoints by adding matching paths (e.g., /swagger-ui/** and /v3/api-docs/**, plus /swagger-ui.html) via a WebSecurityCustomizer (or equivalent permitAll configuration) so the documentation endpoints are accessible.

PERTAIN_TOProblem

I have this config bean: — @Configuration public class EclipseLinkJpaConfiguration extends JpaBaseConfiguration.

PERTAIN_TOSolution

for custom JPA configuration. Outcome: Modify to this:.

PERTAIN_TOProblem

I want a custom prefi x for this controller and the other controllers of same package without affecting the rest of the controllers — I already added the global prefix for the whole app using `context-path`. Tension: leaving the rest of the controllers out of this prefix. Outcome: without adding `@RequestMapping(value = "/prefix/families")` for example for every controller.

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