Spring-Boot Jackson Parsing Error While returning Basic Response-CodePudding

Im trying to return only Basic ResponseEntity in my Application Noticing Jackson Parsing Error. When i do the same in sample Spring boot application , it works fine , not able to figure out what can be causing this issue.This is existing Application.

@RequiredArgsConstructor
@RestController
@Slf4j
@Tag(name = "Public Key")
public class PublicKeyController {

@PostMapping(value ="/checkraw")
public ResponseEntity<String>  getPostResp() {
    return ResponseEntity.ok("test");
}
}

Error :

level":"ERROR","thread":"http-nio-8080-exec-1","message":"Cannot construct instance of `java.util.LinkedHashMap` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('test')\n at [Source: UNKNOWN; line: -1, column: -1]","stack_trace":"com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `java.util.LinkedHashMap` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('test')\n at [Source: UNKNOWN; line: -1, column: -1]\r\n\tat com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:63)\r\n\tat com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1455)\r\n\tat com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1081)\r\n\tat com.fasterxml.jackson.databind.deser.ValueInstantiator._createFromStringFallbacks(ValueInstantiator.java:371)\r\n\tat com.fasterxml.jackson.databind.deser.ValueInstantiator.createFromString(ValueInstantiator.java:258)\r\n\tat com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:357)\r\n\tat com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:29)\r\n\tat com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4229)\r\n\t... 77 common frames omitted\r\nWrapped by: java.lang.IllegalArgumentException: Cannot construct instance of `java.util.LinkedHashMap` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('test')\n at [Source: UNKNOWN; line: -1, column: -1]\r\n\tat com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4234)\r\n\tat com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4175)\r\n\tat com.ocbc.ms.signature.advice.DigitalSigningControllerAdvice.beforeBodyWrite(DigitalSigningControllerAdvice.java:258)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyAdviceChain.processBody(RequestResponseBodyAdviceChain.java:141)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyAdviceChain.beforeBodyWrite(RequestResponseBodyAdviceChain.java:116)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:278)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:219)\r\n\tat org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:82)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:123)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)\r\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)\r\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)\r\n\tat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:652)\r\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:733)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat com.ocbc.ms.core.filter.AddHeaderToContextFilter.doFilter(AddHeaderToContextFilter.java:32)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat com.ocbc.ms.core.filter.ResponseHeaderSetterFilter.doFilter(ResponseHeaderSetterFilter.java:22)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat com.ocbc.ms.core.filter.MandatoryHeaderValidationFilter.doFilter(MandatoryHeaderValidationFilter.java:71)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat com.ocbc.ms.core.filter.InjectionSafeValidationFilter.doFilter(InjectionSafeValidationFilter.java:60)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat com.ocbc.ms.core.filter.MDCRequestFilter.doFilter(MDCRequestFilter.java:40)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat com.ocbc.ms.core.filter.MultiReadRequestFilter.doFilter(MultiReadRequestFilter.java:22)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat com.ocbc.ms.core.filter.ExceptionHandlerFilter.doFilterInternal(ExceptionHandlerFilter.java:27)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:93)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)\r\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)\r\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)\r\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)\r\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)\r\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)\r\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)\r\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)\r\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)\r\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)\r\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590)\r\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\r\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)\r\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)\r\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\r\n\tat java.lang.Thread.run(Thread.java:834)\r\n"}

If i use return custome object , it works fine as below

@PostMapping(value = "/checkraw")
 public DummyObject getPostResp() {
     DummyObject response = new DummyObject();
     return response ;
 }

below are the dependency

<dependencies>
    <!-- spring framework -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-core</artifactId>
    </dependency>

    <!-- cmbp core framework -->
    <dependency>
        <groupId>com.cmbp.core</groupId>
        <artifactId>ms-lib-core</artifactId>
        <version>${ms-lib-core.version}</version>
        <exclusions>
            <exclusion>
                <groupId>io.swagger.core.v3</groupId>
                <artifactId>swagger-models</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>com.cmbp.core</groupId>
        <artifactId>ms-lib-connector-resttemplate</artifactId>
        <version>${ms-lib-connector-resttemplate.version}</version>
    </dependency>
    <dependency>
        <groupId>com.cmbp.ms</groupId>
        <artifactId>ms-lib-openapi</artifactId>
        <version>${ms-lib-openapi.version}</version>
    </dependency>

    <!-- misc -->
    <dependency>
        <groupId>com.nimbusds</groupId>
        <artifactId>nimbus-jose-jwt</artifactId>
        <version>${nimbus-jose-jwt.version}</version>
    </dependency>
    <dependency>
        <groupId>com.vladmihalcea</groupId>
        <artifactId>hibernate-types-52</artifactId>
        <version>${hibernate-types-52.version}</version>
    </dependency>
    <dependency>
        <groupId>net.logstash.logback</groupId>
        <artifactId>logstash-logback-encoder</artifactId>
        <version>${logstash-logback-encoder.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
    </dependency>
    <!-- For OCPS Check -->
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcprov-jdk15on</artifactId>
        <version>${bcpkix-jdk15on.version}</version>
    </dependency>
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcpkix-jdk15on</artifactId>
        <version>${bcpkix-jdk15on.version}</version>
    </dependency>
    <!-- For OCPS Check -->
    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>${commons-lang.version}</version>
    </dependency>

    <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>${commons-collections.version}</version>
    </dependency>
    <dependency>
        <groupId>commons-net</groupId>
        <artifactId>commons-net</artifactId>
        <version>${commons-net.version}</version>
    </dependency>

    <dependency>
        <groupId>commons-cli</groupId>
        <artifactId>commons-cli</artifactId>
        <version>${commons-cli.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-pool2</artifactId>
        <version>${commons-pool2.version}</version>
    </dependency>

    <!-- For OCPS Check -->
    <dependency>
        <groupId>org.flywaydb</groupId>
        <artifactId>flyway-core</artifactId>
    </dependency>
    <dependency>
        <groupId>org.hibernate.validator</groupId>
        <artifactId>hibernate-validator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.hibernate.validator</groupId>
        <artifactId>hibernate-validator-annotation-processor</artifactId>
    </dependency>
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <scope>compile</scope>
    </dependency>
    <!-- added after removing ms-pom-security -->
    <dependency>
        <groupId>com.squareup.okhttp3</groupId>
        <artifactId>okhttp</artifactId>
        <version>${okhttp.version}</version>
    </dependency>
    <!-- test dependencies -->
    <dependency>
        <groupId>org.mockito</groupId>
        <artifactId>mockito-core</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.junit.platform</groupId>
        <artifactId>junit-platform-launcher</artifactId>
        <version>${junit-platform-launcher.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.jeasy</groupId>
        <artifactId>easy-random-core</artifactId>
        <version>${easy-random-core.version}</version>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.objenesis</groupId>
                <artifactId>objenesis</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>

CodePudding user response：

Try the following:

@PostMapping(value = "/checkraw")
public String getPostResp() {
    return "test";
}

Spring Boot should take care of marshaling back the return value into a response.

Instead of @PostMapping have you tried with @GetMapping. That will most likely work.

CodePudding user response：

Found the issue. This code was added not sure why it was implemented but was causing the issue. Thankyou for all your support.

public class ControllerAdvice implements ResponseBodyAdvice<Object> {

@Override
public boolean supports(
@NonNull MethodParameter returnType,
 @NonNull Class<? extends HttpMessageConverter<?>> converterType) {
return true;
}

@Override
public Object beforeBodyWrite(
Object body,
 @NonNull MethodParameter parameter,
 @NonNull MediaType mediaType,
 @NonNull Class<? extends HttpMessageConverter<?>> converterType,
 @NonNull ServerHttpRequest request,
 @NonNull ServerHttpResponse response) {
if (body == null
 || Primitives.allWrapperTypes().contains(body.getClass())
|| Primitives.allPrimitiveTypes().contains(body.getClass())
|| (body instanceof String && ((String) body).contains("openapi"))) {
return body;
 }

ObjectMapper mapper = new ObjectMapper();
 Map<String, Object> map =
mapper.convertValue(body, new TypeReference<Map<String, Object>>() {
});

 if (map.containsKey(ERROR_CODE)
&& map.get(ERROR_CODE) != null
 && map.get(ERROR_CODE).toString().startsWith("AUTH-401")) {
List<String> apiKeyList = request.getHeaders().get(HttpHeaders.AUTHORIZATION);
 if (!CollectionUtils.isEmpty(apiKeyList)) {
response.getHeaders().add(HttpHeaders.WWW_AUTHENTICATE, apiKeyList.get(0));
 }
}
return body;
}