[XW-700] DefaultValidatorFactory throws exception

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.1.2
• Fix Version/s: 2.1.4
• Component/s: Validators
• Assignee: Rainer Hermanns
• Reporter: Hernan J. Gonzalez
• Created: 14/May/09 14:24
• Updated: 28/May/09 09:27
• Resolved: 28/May/09 09:27

Description

The start of my web application (Struts2 with Xwork 2.1.2 over Tomcat 6, Fedora Core 10) sometimes throws an exception

ERROR [main] com.opensymphony.xwork2.validator.DefaultValidatorFactory error- Unable to load file:/root/

java.lang.NullPointerException

at java.util.Arrays$ArrayList.<init>(Arrays.java:3357)

at java.util.Arrays.asList(Arrays.java:3343)

at com.opensymphony.xwork2.validator.DefaultValidatorFactory.parseValidators(DefaultValidatorFactory.java:117)

at com.opensymphony.xwork2.validator.DefaultValidatorFactory.<init>(DefaultValidatorFactory.java:44)

Looking at the souce, the problem seems to happen when

Iterator<URL> urls = ClassLoaderUtil.getResources("", DefaultValidatorFactory.class, false);

returns a directory which is not readable by the present user.

That happened to me, because I start the container (tomcat) by a script run by root that makes a 'su' to a 'tomcat' user.

Afterwards, the above line returned, among others, the 'current directory', that happens to be /root/ , which is unreadable by 'tomcat', and then java.util.Arrays.asList(null) fails badly.

I think a simple check ( f.listFiles() != null) would suffice.

Hernán González