MVC Portlet does not work when GZip filter is not applied

• Type: Regression Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: 7.0.X EE
• Fix Version/s: 7.0.0 DXP FP28, 7.0.X, Master
• Component/s: Core Infrastructure > MVC Portlet
• Labels: None
• Story Points: 1
• Fix Priority: 3
• Last Working Version:
  7.0.0 DXP FP20

Steps to reproduce it:

1. Create a simple portlet (see portlet-example.jar attached).
2. Disable GZipFilter in portal-ext.properties: com.liferay.portal.servlet.filters.gzip.GZipFilter=false
3. Start the application and deploy the portlet on it.
4. Add the previously deployed portlet to the portal.
5. Interact with the portlet.

 Observed behaviour: the portlet does not work (in the example the message is not showed). Content-length of the response is 0.

 

 Expected behaviour: the portlet works (in this case we can see the message).