Cannot access docker container app by localhost, access by IP got timeout

I just got a new PC last week. So I setup my working environment as usual in Windows 10 with the latest Windows Docker Desktop. Then created a very simple spring boot REST service just to say hello, created the image with Spring boot Buildpacks 3 days ago, it worked fine with port mapping “docker run -p 8090:8080 davy/myapp”. This image is working well even today: I can access my application by “http://localhost:8090/sayHello” even today.

the working image

So, I started to build my real application and completed some functionalities. I wanted to test my app and created a new image by using spring boot Buildpacks.

Now I got a big problem: I cannot not access the application running in the container by port mapping with port mapping “docker run -p 8090:8080 davy/myapp” any more by “http://localhost:8090/sayHello”. It got an error page said "localhost did not send any data"

cannot send data image

Then I got my container IP by “docker inspect -f ‘{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}’ 548e29f46ca7”, which displayed as “172.17.0.2/”. So I tried http://172.17.0.2:8090/sayHello. Now I got a timeout after waiting for some time I got "172.17.0.2 took too long to respond":

timeout image

I did not see any difference in the ports binding: both are 0.0.0.0:8090->8080/tcp

port binding for 2 images

I re-built the image several times by using Spring boot Buildpacks, 1 time Dockerfile and docker-compose.yml, and I cannot make the container like the old container any more.

I also tried “docker run -p 8088:8080 davyhu/myapp -m http.server –bind 0.0.0.0”, but got the same result: cannot access app by localhost, and IP timeout.

Thanks in advance for the helps!

Here are some more information:

config in pom.xml for buildpacks (no change for both versions in the pom.xml):

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <image>
                    <name>davyhu/${project.artifactId}</name>
                </image>
            </configuration>
        </plugin>
    </plugins>
</build>

PDFController.java

public class PdfGenerationController {

private static final Logger logger = LoggerFactory.getLogger(PdfGenerationController.class);

private static final SimpleDateFormat DateFormatterIn1 = new SimpleDateFormat("yyyy-MM-dd");
//private static final SimpleDateFormat DateFormatterIn2 = new SimpleDateFormat("dd/MM/yyyy");
private static final SimpleDateFormat DateFormatterOut = new SimpleDateFormat("dd/MM/yyyy");
private static final SimpleDateFormat DateFormatterIn2 = new SimpleDateFormat("yyyy-MM-dd");
//private static final SimpleDateFormat DateFormatterOut = new SimpleDateFormat("yyyy-MM-dd");

@Autowired
private ResourceBundleMessageSource source;
@Value("${pdf.title}")
private static String pdfTitle;
@Value("${pdf.footerText1}")
private static String pdfFooterText1;

@CrossOrigin(origins = "http://localhost:4200")
@PostMapping("/getPdf")
public ResponseEntity<byte[]> getPDF(
        @RequestHeader(name = "Accept-Language", required = true) final Locale locale, 
        @RequestBody String jsonInput) {
    logger.info("myCustomerDetails() method started");
    logger.info(jsonInput);
    logger.info("locale = {}", locale);
    
    JSONObject data = new JSONObject(jsonInput);

    byte[] pdfFile = null;
    ResponseEntity<byte[]> response = null;
    HttpHeaders headers = new HttpHeaders();
    try {
        pdfFile = new PdfGenertor().generatePDF(data,locale);
    }catch (Exception e) {
        e.printStackTrace();
        response = new ResponseEntity<>(null, headers, HttpStatus.METHOD_FAILURE);
    }

    headers.setContentType(MediaType.APPLICATION_PDF);
    String filename = "fro_soa_form.pdf";
    headers.setContentDispositionFormData(filename, filename);
    headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");
    response = new ResponseEntity<>(pdfFile, headers, HttpStatus.OK);
    return response;
}

private String formatDate(SimpleDateFormat format, String str) {
    try {
        Date date = format.parse(str);
        return DateFormatterOut.format(date);
    } catch (Exception e) {
        return "";
    }
}

@GetMapping("/sayHello")
public String sayHello() {
    return "Hello";
}

}

It the code worked fine in eclipse with postman (PDF displayed with Jason input and header accepted language).

first and second image are all build with "mvn spring-boot:build-image".

If anything I need to post, please let mw know.

Thanks!

Dockerfile: 
FROM openjdk:11-slim as build
MAINTAINER xxxx.ca
COPY target/fro_soa_backend-0.0.1-SNAPSHOT.jar fro_soa_backend-0.0.1-SNAPSHOT.jar

ENTRYPOINT ["java","-jar","/fro_soa_backend-0.0.1-SNAPSHOT.jar"]