Stress test intermittenly fails with exception

Caused by: java.lang.NoClassDefFoundError: Could not initialize class sun.util.calendar.ZoneInfoFile
       at sun.util.calendar.ZoneInfo.getAvailableIDs(ZoneInfo.java:535)
       at java.util.TimeZone.getAvailableIDs(TimeZone.java:543)
       at javasoft.sqe.tests.api.java.util.TimeZone.staticTests.<clinit>(staticTests.java:43)
       at java.lang.Class.forName0(Native Method)
       at java.lang.Class.forName(Class.java:264)
       at nsk.sysdict.share.JCKTest$Loader.load(JCKTest.java:107)
       at nsk.sysdict.share.JCKTest$Loader.run(JCKTest.java:69)
       ... 1 more

I also encountered

Caused by: java.lang.NoClassDefFoundError: Could not initialize class sun.util.LocaleServiceProviderPool$AllAvailableLocales
        at sun.util.LocaleServiceProviderPool.getAllAvailableLocales(LocaleServiceProviderPool.java:194)
        at java.util.Locale.getAvailableLocales(Locale.java:911)
        at javasoft.sqe.tests.api.java.util.TimeZone.staticTests.<clinit>(staticTests.java:67)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:264)
        at nsk.sysdict.share.JCKTest$Loader.load(JCKTest.java:107)
        at nsk.sysdict.share.JCKTest$Loader.run(JCKTest.java:69)
        ... 1 more