Github user duncangrant commented on a diff in the pull request:

    https://github.com/apache/brooklyn-docs/pull/89#discussion_r70506491
  
    --- Diff: guide/ops/troubleshooting/deployment.md ---
    @@ -75,6 +75,58 @@ There are many possible reasons for this ssh failure, 
which include:
     A very useful debug configuration is to set `destroyOnFailure` to false. 
This will allow ssh failures to
     be more easily investigated.
     
    +#### java.security.KeyException when Provisioning VM
    +
    +The exception `java.security.KeyException` can be thrown when jclouds is 
attempting the SSL handshake,
    +to make cloud API calls. This can happen if the version of nss is older 
than 3.16 - the nss package
    +includes the ssl library.
    +
    +To fix this on CentOS, run:
    +
    +{% highlight bash %}
    +sudo yum upgrade nss
    +{% endhighlight %}
    +
    +For a discussion of investigating this kind of issue, see this 
[Backslasher blog](http://blog.backslasher.net/java-ssl-crash.html).
    +
    +The full stacktrace is shown below:
    +
    +{% highlight %}
    --- End diff --
    
    You have to pick a language - otherwise just indent section with tabs


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