ADDITIONAL SYSTEM INFORMATION :
Problem for all systems.

A DESCRIPTION OF THE PROBLEM :
The opening lines of `DocumentBuilderFactoryImpl#getAttribute` are:
```
    public Object getAttribute(String name)
        throws IllegalArgumentException
    {

        //check if the property is managed by security manager
        String pName;
        if ((pName = fSecurityManager.find(name)) != null) {
            return attributes.get(pName);
        } else if ((pName = fSecurityPropertyMgr.find(name)) != null) {
            return attributes.get(pName);
        }

        // See if it's in the attributes Map
        if (attributes != null) {
            Object val = attributes.get(name);
            if (val != null) {
                return val;
            }
        }
```

The security check appears to have been added in 2021. It attempts to check the `attributes` attribute *before checking to see if `attributes` is null`.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Bug discovered when using Eclipse & XText.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should not be a null pointer exception
ACTUAL -
NullPointerException occurs because `attributes` is null.

CUSTOMER SUBMITTED WORKAROUND :
The fix is to change the opening code to this:
```
    public Object getAttribute(String name)
        throws IllegalArgumentException
    {
        if (attributes != null) {

          //check if the property is managed by security manager
          String pName;
          if ((pName = fSecurityManager.find(name)) != null) {
              return attributes.get(pName);
          } else if ((pName = fSecurityPropertyMgr.find(name)) != null) {
              return attributes.get(pName);
        }

          // See if it's in the attributes Map
            Object val = attributes.get(name);
            if (val != null) {
                return val;
            }
        }
```

FREQUENCY : occasionally