all confluence users login fail

[shiqi]

includes using recovery_admin account. 

it's a data disaster for our team! we need your help, thanks so much!

when i try the recovery_admin login, it performed bellow errors:

"A system error has occurred — our apologies! ..."

Cause

org.apache.velocity.exception.MethodInvocationException: Invocation of method 'isShowSignUp' in class com.atlassian.confluence.user.actions.LoginAction threw exception java.lang.NullPointerException: Application cannot be null at /login.vm[line 6, column 28]
    at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:342)

caused by: java.lang.NullPointerException: Application cannot be null
    at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:895)

[Marc Koppelaar]

Hi @shiqi 

Welcome to the community.

This type of NullPointerException error can occur when there is inconsistent index numbering for the User Directories.

Try implementing the solution in this knowledge base article to fix any issues with the directory indexes: 

Confluence returns system error due to 'Invocation of method 'isShowSignUp' in class com.atlassian.confluence.user.actions.LoginAction threw exception java.lang.NullPointerException at /login.vm'