You should define the users as below:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<tenants>
<groups/>
<users>
<user identifier="b64b7120-1d20-4b10-9cd8-f53a0502167b"
identity="admin-user" />
...
</users>
</tenants>
Hope this helps,
Pierre
Le ven. 1 août 2025 à 16:05, [email protected]
<[email protected]> a écrit :
>
> Hi Pierre,
>
> Thank you for the quick reply.
>
> Here is the content of my users.xml file, as requested.
>
> ---
> <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
> <tenants>
> <groups/>
> <users>
> <user>
> <identifier>b64b7120-1d20-4b10-9cd8-f53a0502167b</identifier>
> <identity>admin-user</identity>
> </user>
> </users>
> </tenants>
> ---
>
> I appreciate your help in looking into this.
>
> Thank you.
>
> Best Regards,
>
> Dana
>
> ________________________________
> From: Pierre Villard <[email protected]>
> Sent: Friday, August 1, 2025 5:59 PM
> To: [email protected] <[email protected]>
> Subject: Re: [NIFI-2.5.0] Persistent startup error: Element 'user' must have
> no character or element information item
>
> Hi Dana,
>
> Can you share the (redacted if needed) content of users.xml file?
>
> Thanks,
> Pierre
>
> Le ven. 1 août 2025 à 12:39, [email protected]
> <[email protected]> a écrit :
> >
> > Hello everyone,
> >
> > I'm trying to set up a new instance of Apache NiFi 2.5.0 with security
> > enabled for a new project.
> >
> > I have been running into a persistent startup error and am looking for some
> > guidance.
> >
> > Environment Details
> >
> > NiFi Version: 2.5.0
> > Java : openjdk version "21.0.7"
> > OS : Windows 10 Home
> >
> > The Problem Description
> >
> > The application fails to start with the following error:
> > 2025-08-01 16:53:11,024 ERROR [main] o.s.web.context.ContextLoader Context
> > initialization failed
> > org.springframework.beans.factory.UnsatisfiedDependencyException: ...
> > Caused by: org.springframework.beans.factory.BeanCreationException: Error
> > creating bean with name 'authorizer': FactoryBean threw exception on object
> > creation ... Caused by:
> > org.apache.nifi.authorization.exception.AuthorizerCreationException:
> > jakarta.xml.bind.UnmarshalException - with linked exception:
> > [org.xml.sax.SAXParseException; systemId:
> > file:/C:/nifi-2.5.0-bin/nifi-2.5.0/./conf/users.xml; lineNumber: 8;
> > columnNumber: 16; cvc-complex-type.2.1: Element 'user' must have no
> > character or element information item [children], because the type's
> > content type is empty.] ...
> >
> > Based on standard troubleshooting, here is a list of the steps I have
> > already taken:
> >
> > 1. Configured security files (authorizers.xml, users.xml) and verified the
> > configuration multiple times.
> >
> > 2. Confirmed the 'Initial Admin Identity' is correctly set in both the
> > access policy provider and the managed authorizer blocks.
> >
> > 3. Ensured the 'User Group Provider' property is correctly defined in all
> > relevant sections of authorizers.xml.
> >
> > 4. Corrected the 'nifi.security.user.authorizer' property in
> > nifi.properties to point to 'managed-authorizer'.
> >
> > 5. Confirmed the users.xml file has the correct structure (groups before
> > users, valid tags, etc.) and contains the admin user definition.
> >
> > 6. Recreated users.xml from scratch using a clean text editor and from the
> > command line to rule out hidden character or formatting issues.
> >
> > 7. Performed a complete and clean reinstallation of NiFi 2.5.0, deleting
> > all old files and re-applying the configuration.
> >
> > 8. Confirmed that the user running NiFi has Full Control permissions over
> > the NiFi installation directory.
> >
> > Despite all these steps, the error persists.
> >
> > This is an unusual issue, and I'm at a loss for what to try next. Could
> > someone please provide some guidance on what might be causing this error,
> > or if there's something I've missed?
> >
> > Thank you for your time and expertise.
> >
> > Best Regards,
> >
> > Dana
