Hi Pierre, Thank you again for your quick response and for providing the correct format for users.xml.
I have applied the fix you provided. However, I am still getting an error after several more troubleshooting steps. Here is what I have done since my last email: 1. I have updated the users.xml file to the exact attribute-based format you provided. 2. I have deleted the authorizations.xml file and the entire work directory. 3. I have restarted NiFi, forcing it to rebuild all its files from scratch. Despite all these steps, I am still getting the same error. The log shows the following: --- 2025-08-01 22:25:58,193 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: Unable to locate initial admin b64b7120-1d20-4b10-9cd8-f53a0502167b to seed policies ... --- Given that the users.xml file is now in the correct format, I am very confused as to why the error persists. It seems the issue might be beyond a simple configuration file problem. Do you have any further suggestions, perhaps related to a system-level or environment-specific issue? Thank you for your time and continued assistance. Best Regards, Dana ________________________________ From: Pierre Villard <[email protected]> Sent: Friday, August 1, 2025 9:12 PM To: [email protected] <[email protected]> Cc: [email protected] <[email protected]> Subject: Re: [NIFI-2.5.0] Persistent startup error: Element 'user' must have no character or element information item 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
