Answers.Body: <p>Having found the users have repeatedly misconfigured Dedupe / Matching Rules with a Weight Threshold of zero or NULL, both of which (I think) can result in a search of every record against every other record, I believe that Save should not be possible with zero/null.</p>
  
  <p><a href="https://issues.civicrm.org/jira/browse/CRM-20216" rel="nofollow noreferrer">Jira here</a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-03-03T19:52:55.637Z
Answers.LastActivityDate: 2017-03-03T19:52:55.637Z
Answers.UserDisplayName: petednz - fuzion
Body: <p>Title pretty much says it all and this question is being asked so it can be found easily and we can track progress in JIRA</p>
  
Tags: <duplicate-contacts>
Title: Why might a dedupe rule fail to deliver results, or result in server crashing?
ThreadText: # Why might a dedupe rule fail to deliver results, or result in server crashing?
  
  (Asked by: username_0 on 2017-03-03)
  
  Title pretty much says it all and this question is being asked so it can be found easily and we can track progress in JIRA
  
  **Tags:** duplicate-contacts
  
  
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  ## 1 answers
  
  ### Answer by username_0 on 2017-03-03. Score: 1
  
  Having found the users have repeatedly misconfigured Dedupe / Matching Rules with a Weight Threshold of zero or NULL, both of which (I think) can result in a search of every record against every other record, I believe that Save should not be possible with zero/null.
  
  [Jira here](https://issues.civicrm.org/jira/browse/CRM-20216)
  
  
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