Should we upgrade from Tomcat 7 to Tomcat 8 ?

Are there any compelling reasons to upgrade from Tomcat 7 to Tomcat 8. We are having no issues with Tomcat 7, but the question is should we upgrade and why ?
shuniAsked:
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rrzCommented:
Which version of Java are you using?
You can look at
https://tomcat.apache.org/migration-8.html
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shuniAuthor Commented:
Using Java 7 and working on upgrading to Java 8.
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Anthony GarciaDevops StaffCommented:
Generally if something works I tend not to want to upgrade. I recently made the move from tomcat6 to tomcat8 and skipped tomcat7. We were running java 8 so it seemed correct to go with the latest tomcat version to match.

If you do make the switch you will likely have to update your configuration following the migration guide listed above, but you are already on java 7, so at least you won't have to update that.
There is a chance you might see some performance improvements, but this probably won't be too noticeable unless it is a very intensive application.

Tomcat 8 is generally stable now. You can see what was offered by this version on this page.
http://tomcat.apache.org/whichversion.html
Apache Tomcat 8.x builds on Tomcat 7.0.x and implements the Servlet 3.1, JSP 2.3, EL 3.0 and Web Socket 1.1 specifications. In addition to that, it includes the following significant improvements:

A single, common resources implementation to replace the multiple resource extension features provided in earlier versions.

The main feature to me support for servlet 3.1 and the default connectors switching from java's BIO to NIO(Non Blocking I/O).

Personally I would hold off on upgrading unless I was having issues. on the versions page I linked above you see that tomcat versions 3.3, 4.1 and 5.5 have been "archived",  but versions 6 and 7 have not. If they were then I would definitely suggest migrating otherwise it is not really necessary.
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dpearsonCommented:
Yeah I'd agree - don't upgrade unless there's a feature available in 8 that you particularly want to use (e.g. a part of the new servlet specification).

Otherwise you're taking on significant risk for little benefit.  Your app or apps should work just the same after the upgrade, but if they don't it could be substantial work to figure out why not and fix them.

Doug
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kinnera MCommented:
HI

We have a requirement to upgrade tomcat 6 to 8(skipping 7) in Linux environment. Can anyone share  steps/doc  for the same.
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