The testcase

api/java_time/tck/java/time/format/index.html#TCKDateTimeFormatter[test_resolverFields_selectOneDateResolveYD]

might fail in some modes - the failure could be seen for example in SingleJVM and MultiJVM but might not be reproducible with GroupJVM mode

However it is reproducible as a standalone code:

import java.time.*;
import java.time.format.*;
import java.util.Arrays;
import java.util.HashSet;

import static java.time.temporal.ChronoField.*;
import static org.testng.Assert.*;

public class Test_resolverFields_selectOneDateResolveYD {

    public static void main(String[] args) {
        DateTimeFormatter base = new DateTimeFormatterBuilder()
                .appendValue(YEAR).appendLiteral('-').appendValue(MONTH_OF_YEAR).appendLiteral('-')
                .appendValue(DAY_OF_MONTH).appendLiteral('-').appendValue(DAY_OF_YEAR).toFormatter();
        DateTimeFormatter f = base.withResolverFields(YEAR, DAY_OF_YEAR);
        assertEquals(f.getResolverFields(), new HashSet<>(Arrays.asList(YEAR, DAY_OF_YEAR)));
        try {
            base.parse("2012-6-30-321", LocalDate::from); // wrong month/day-of-month
            fail();
        } catch (DateTimeException ex) {
            // expected, fails as it produces two different dates
        }
        LocalDate parsed = f.parse("2012-6-30-321", LocalDate::from); // ignored month/day-of-month
        assertEquals(parsed, LocalDate.of(2012, 11, 16));

    }
}


With JDK8b88 the program prints:


Exception in thread "main" java.lang.AssertionError: Lists differ at element [0]: Year != DayOfYear expected:<Year> but was:<DayOfYear>
at org.testng.Assert.fail(Assert.java:84)
at org.testng.Assert.failNotEquals(Assert.java:438)
at org.testng.Assert.assertEquals(Assert.java:108)
at org.testng.Assert.assertEquals(Assert.java:489)
at org.testng.Assert.assertEquals(Assert.java:458)
at Test_resolverFields_selectOneDateResolveYD.main(Test_resolverFields_selectOneDateResolveYD.java:16)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)