CRM-7308 Mark this pair as not a duplicate never completes in contact/merge

When looking at a pair of contacts to potentially merge on the page contact/merge one option presented is to "Mark this pair as not a duplicate."

However when this is clicked, and after clicking "OK" to the pop-up dialog box, the page immediately starts reloading to a different page, typically dedupefind?reset=1&rgid=4&action=browse.

Checking the dedupe_exception table, the new row never gets written.

So two problems:

1. It redirects to a VERY undesirable page (the list of potential duplicates sometimes takes 3-4 minutes to load)
2. It doesn't save the exception

I tried this on the demo site and could not replicate it.

However I think the reason is that the demo site is speedy and has a very small database.

On our production site, with a fairly large DB and slower response time, the ajax request goes out to write to dedupe_exception and before it can complete, the page redirects to the very slow-loading list of potential duplicates. The page redirect interrupts the ajax request and it never completes.

I was able to fix the problem by introducing a delay before the page reload (Dedupe.tpl about line 42):

if ( context == 'merge-contact' && reloadURL ) {
//wait 4 seconds to allow the ajax to finish up before leaving the page
function relocate ()

setTimeout(function ()

, 4000);

}

This is probably not the ideal solution--the 4 second delay may or may not be enough depending on circumstances. Ideally it would present you with a message saying the contacts had been marked as non-duplicates and then you would be allowed to go wherever you want.

The return URL is set to {$userContextURL} (Merge.tpl around like 36). This usually seems to be dedupefind?reset=1&rgid=4&action=browse or some variant, regardless of the context.

If it must redirect, something like /civicrm/contact/deduperules&reset=1 is a much better choice.