WildFly broken since switched to metosin/muuntaja

[benwhorwood]

It appears as though WildFly has been broken by changes from b1fe4e3 (switched to metosin/muuntaja )...

(Please note I've abbreviated the stack trace below.)

#error {
 :cause com.fasterxml.jackson.databind.util.LRUMap cannot be cast to java.util.LinkedHashMap
 :via
 [{:type java.lang.ClassCastException
   :message com.fasterxml.jackson.databind.util.LRUMap cannot be cast to java.util.LinkedHashMap
   :at [muuntaja.parse$fast_memoize$fn__3241 doInvoke parse.clj 13]}]
 :trace
 [[muuntaja.parse$fast_memoize$fn__3241 doInvoke parse.clj 13]
  [clojure.lang.RestFn invoke RestFn.java 408]
  [muuntaja.core$_negotiate_request invokeStatic core.clj 336]
  [muuntaja.core$_negotiate_request invoke core.clj 335]
  [muuntaja.core$negotiate_request invokeStatic core.clj 374]
  [muuntaja.core$negotiate_request invoke core.clj 372]
  [muuntaja.core$format_request invokeStatic core.clj 387]
  [muuntaja.core$format_request invoke core.clj 385]
  [muuntaja.middleware$wrap_format$fn__3855 invoke middleware.clj 71]
}

As a temporary measure I have undone the changes from b1fe4e3 in my project's middleware namespace (essentially switched back to using ring.middleware.format/wrap-restful-format).

Tested against the following versions:

• WildFly 10.1.0 Final
• WildFly 9.0.2 Final
• WildFly 9.0.1 Final

Stock deployment (deployed as WAR) using OpenJDK 1.8.0_131 on Debian Stretch, e.g. http://forgezilla.com/installing-wildfly-10-on-debianubuntu/

Can reproduce using:

$ lein new luminus wftest
$ cd wftest
$ lein immutant war

Then upload WAR to /path/to/wildfly/standalone/deployments.

[yogthos]

@ikitommi sounds like it might be a bug in muuntaja?

[ikitommi]

Hi. Muuntaja depends on newer version on Jackson than WildFly ships with, causing the issue. Quick fix: https://stackoverflow.com/questions/37591081/wildfly-10-deploy-an-application-with-newer-version-of-jackson

Real fix should be applied in Muuntaja itself: metosin/muuntaja#53

[ikitommi]

Could you try with [metosin/muuntaja "0.3.2-20170725.052408-1"].

[benwhorwood]

Hi, many thanks for the quick responses!

@ikitommi I can confirm that replacing [metosin/muuntaja "0.3.1"] with [metosin/muuntaja "0.3.2-20170725.052408-1"] in project.clj fixes the problem; the WAR file produced by lein immutant war runs without issue on WildFly 10.1.0 Final.

I would assume that all other referenced WildFly versions work as well due to the rectified Jackson dependency, but would be happy to try them if you would like me to?

[ikitommi]

Hi, pushed out [metosin/muuntaja "0.3.2"] with the fix. There is no dependency to Jackson Databind anymore, so it should work with all versions.

[yogthos]

Thanks for the quick turnaround, just pushed out a new template with the updated version. 👍

[benwhorwood]

@ikitommi and @yogthos, thank you both for such a quick response and also for the projects in general, great work!

I have just done a test deployment with stock project generated from 2.9.11.71 and can confirm that everything works correctly with WildFly 10.1.0 out of the box.