I have a problem with creating a new user in Amazon Redshift. I followed the description on [Getting Started with Amazon Redshift](http://docs.aws.amazon.com/redshift/latest/gsg/getting-started.html) and was able to create a cluster with data from the example described there. I can connect to the cluster using the latest version of SQL Workbench/J (Build 122, 2017-02-04) and of the driver (JDBC 4.2–compatible) from an EC2 instance. It fails when I try to create a new user:

```
create user dbuser25x with password 'abcD1234';

```

One of these things happens:

1. I get the message confirming that the user was created, but there is no user:

```
User dbuser25x created
Execution time: 0.04s

```
2. The query fails:

```
An error occurred when executing the SQL command:
create user dbuser25x with password 'abcD1234'
[Amazon](500310) Invalid operation: user "dbuser25x" already exists;
1 statement failed.
Execution time: 0s

```
3. The query hangs.

In every situation I use this statement to check the result:

```
    select * from pg_user;

```

This user is not there and I do not know why.

Another developer tried to create a new user in the same way and got the same problems.
I tried solutions from the section There Is a Potential Deadlock of [Troubleshooting Queries](http://docs.aws.amazon.com/redshift/latest/dg/queries-troubleshooting.html) - they did not help.
I used a dedicated Windows EC2 instance on which I installed only SQL Workbench/J to exclude influence of other software - this did not solve the problem.