spring boot jsp 404 Whitelabel Error Page with 1.5.0

[godpit]

spring boot 1.4.0.RELEASE: Realpath=null, it is ok

spring boot 1.5.10.RELEASE:Realpath=/private/var/folder/....
the path is not found in my OS, so that it is 404 with Whitelabel Error Page

However, how i could solve this problem?

[bclozel]

Given this description, I don't understand the issue here.
Could you provide a small application that reproduces the issue and describe 1) what you're trying to achieve, 2) what you've tried, 3) what you expected as a result and 4) what you got instead.

Thanks!

[godpit]

spring boot 1.4.0 + jsp, the jar of package is ok ,but spring boot 1.5.10, it is error with Whitelabel Error Page.
the above image is diff with debug.

[godpit]

Both of them could go into the method of controller, but it is error with Whitelabel Error Page in spring boot 1.5.10. So, i found that it is different between 1.4.0 and 1.5.10 in org.apache.jasper.servlet.JspServlet .

[godpit]

I build that it is a package of jar package ,not a war. And i use the command of 'java -jar ....'

[wilkinsona]

We do not support JSPs with jar packaging. If you want to use JSPs you must use war packaging. Given that it's not clear that this is a bug in Spring Boot, I'm going to close this one. If it doesn't work with war packaging, please provide a sample that reproduces the problem and we can re-open the issue.

[godpit]

why is it ok with spring boot 1.4.0?

[godpit]

jsp-1.4.0.zip

this is a simple example.

I add the node in the pom :

<resources>
           <resource>
                <directory>src/main/resources</directory>
            </resource>
            <resource>
                <directory>src/main/webapp</directory>
                <targetPath>META-INF/resources</targetPath>\
            </resource>
</resources>

spring.mvc.view.prefix=/WEB-INF/
spring.mvc.view.suffix=.jsp

it is ok with spring boot 1.4.0.

[godpit]

I want to know the reason for that, please help me! Thanks a lot!

[godpit]

@wilkinsona I add the zip of the example. please help me, thanks a lot!

[wilkinsona]

Your sample is using jar packaging which is not supported. If it's working, it's only doing so by accident. Unfortunately, I can't afford to spend time figuring out why it appears to work in your case for two reasons.

1. We only support JSPs with war packaging.
2. 1.4.0 is no longer supported.

The 1.4.0 reference documentation already state that you should use war packaging if you want to use JSPs: https://docs.spring.io/spring-boot/docs/1.4.0.RELEASE/reference/htmlsingle/#boot-features-jsp-limitations. This recommendation still stands with 1.5.x and 2.0.x which are the two currently supported versions.

[godpit]

@wilkinsona I'm so sorry for troubling you. but 1.4.0, it is ok with jar packaging.