sonarqube - Sonar ThreadGroup error on IllegalArgumentException -

sonarqube - Sonar ThreadGroup error on IllegalArgumentException -

sonar shows "threadgroup" error on line illegalargumentexception thrown. why issue here?

here code snippet, issue found sonar:

public static resolutionelection fromvalue(string value) { (resolutionelection election : resolutionelection.values()) { if (election.getvalue().equals(value)) { homecoming election; } } throw new java.lang.illegalargumentexception(); }

sonar error description:

avoid thread group avoid using threadgroup; although intended used in threaded environment contains methods not thread safe.

this known issue relating underlying analyzer pmd : http://jira.codehaus.org/browse/sonarpmd-5

as per bug report, bug should prepare if utilize latest version of sonar-pmd plugin (2.2 of writing) relies on pmd 5.1.1

sonarqube illegalargumentexception threadgroup