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Hi am using Springboot 1.5.3 with this tutorial and I had this exception
web - 2017-06-02 20:14:05,199 [http-nio-8081-exec-3] ERROR o.m.w.e.RestResponseEntityExceptionHandler - 500 Status Code
j.v.ValidationException: HV000028: Unexpected exception during isValid call.
at o.h.v.i.e.c.ConstraintTree.validateSingleConstraint(ConstraintTree.java:451)
at o.h.v.i.e.c.ConstraintTree.validateConstraints(ConstraintTree.java:127)
at o.h.v.i.e.c.ConstraintTree.validateConstraints(ConstraintTree.java:87)
at o.h.v.i.m.c.MetaConstraint.validateConstraint(MetaConstraint.java:73)
at o.h.v.i.e.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:620)
... 95 frames truncated
Caused by: j.l.NullPointerException: null
at o.m.v.PasswordMatchesValidator.isValid(PasswordMatchesValidator.java:18)
at o.h.v.i.e.c.ConstraintTree.validateSingleConstraint(ConstraintTree.java:448)
... 99 common frames omitted

Hey @1988gadocansey - can you give me a bit more info on this one?
What module are you running exactly?
And what are the steps you're running in order to hit this NPE?

Build and Deploy the Project

mvn clean install
This is a Spring Boot project, so you can deploy it by simply using the main class: Application.java
Set up MySQL
mysql -u root -p 
> CREATE USER 'tutorialuser'@'localhost' IDENTIFIED BY 'tutorialmy5ql';
> GRANT ALL PRIVILEGES ON *.* TO 'tutorialuser'@'localhost';
> FLUSH PRIVILEGES;
Set up Email
You need to configure the email by renaming file "email.properties.sample" to "email.properties" and provide your own username and password.

You also need to use your own host, you can use Amazon or Google for example.

You may also setup an email server locally.  See "email.properties.localhost.sample" for more details.
*Takoradi Polytechnic+233243348522, +233505284060*
*[email protected] <[email protected]>*

On Sat, Jul 29, 2017 at 2:56 PM, Eugen ***@***.***> wrote:
 Hey @1988gadocansey <https://github.com/1988gadocansey> - not sure I
 understand. I asked for a bit more info on how to reproduce the problem
 here and you pasted the readme file as an answer :)
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Hmm - interesting - can you write a failing test for it? I'd like to have a way to reproduce it, and a PR might help.

Cheers,

Eugen.