A DESCRIPTION OF THE PROBLEM :
The usage of the pattern "yyyyMMdd'000000+0000'" does not work as expected.
It can successfully format an existing date but throws a DateTimeParseException when trying to parse a correct string

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
DateTimeFormatter f = DateTimeFormatter.ofPattern("yyyyMMdd'000000+0000'");
String myDateString = LocalDate.of(2019, 1, 1).format(f);
// Successfully displays 20190101000000+0000
System.out.println(myDateString);

// Throws DateTimeParseException
LocalDate myLocalDate = LocalDate.parse(myDateString, f);
System.out.println(myLocalDate);

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The date is parsed correctly and displays 2019-01-01 (locale dependent)
ACTUAL -
java.time.format.DateTimeParseException: Text '20190101000000+0000' could not be parsed at index 0

---------- BEGIN SOURCE ----------
package ch.fer.mep.domain;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

public class BugReport {

public static void main(String... args) {
DateTimeFormatter f = DateTimeFormatter.ofPattern("yyyyMMdd'000000+0000'");
String myDateString = LocalDate.of(2019, 1, 1).format(f);
System.out.println(myDateString);

LocalDate myLocalDate = LocalDate.parse(myDateString, f);
System.out.println(myLocalDate);
}
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use a shorter pattern like "yyyyMMdd" and parse only the first 8 characters of the string...
DateTimeFormatter f2 = DateTimeFormatter.ofPattern("yyyyMMdd");
LocalDate myLocalDate = LocalDate.parse(myDateString.substring(0, 8), f2);

FREQUENCY : always