I don't use maven, so not 100% familiar with it.  It appears that there is 
a dependency report that should tell you where it is coming from:

https://maven.apache.org/plugins/maven-project-info-reports-plugin/

Then you should just exclude it:

https://maven.apache.org/guides/introduction/introduction-to-optional-and-excludes-dependencies.html

On Thursday, August 18, 2016 at 10:20:28 AM UTC-7, Drew Spencer wrote:
>
> Thanks for the help. I'm not sure why, but I still have servlet-api:2.5 in 
> my dependencies, as well as javax.servlet-api:3.1.0. I read somewhere that 
> javax.servlet-api replaced servlet-api... I removed it manually but it's 
> being brough in from somewhere and I can't work out where. For the first 
> time in a year I wish I was back in eclipse instead of IntelliJ IDEA :( Any 
> chance you can look at my pom.xml files and help me work it out? 
> https://gist.github.com/slugmandrew/1d9acf86be2c7db89031dc60de9df6e2
>
> On 18 August 2016 at 17:08, JonL <jo...@percsolutions.com <javascript:>> 
> wrote:
>
>> Besides possibly switching to the gwt-maven-archetypes as Frank 
>> suggested, I just added a comment to my answer.  The problem is that you 
>> don't need servlet-api jars on your classpath at all. GWT provides the 
>> appropriate classes for compile time in gwt-user and gwt-dev.
>>
>>
>> On Thursday, August 18, 2016 at 5:54:12 AM UTC-7, Drew Spencer wrote:
>>>
>>> Hey all, I have recently changed the structure of my project to separate 
>>> client, server and shared code into their own maven projects (modules).
>>>
>>> I am getting a HTTP Error 500 related to the Servlet API: 
>>> *java.lang.NoSuchMethodError: 
>>> javax.servlet.http.HttpServletResponse.getHeader(Ljava/lang/String;)Ljava/lang/String;*
>>>
>>> If anyone can help me it would be massively appreciated, as I can't 
>>> really do much without Super Dev Mode
>>>
>>> Full info here: 
>>> http://stackoverflow.com/questions/38979519/why-cant-gwt-connect-to-superdevmode-server-in-multi-module-maven-project
>>>
>>> Thanks to all for your great work on GWT 2.8. It really is appreciated :)
>>>
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>
>
>
> -- 
> Drew Spencer
>

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