The getGroups has the side effect of modifying i.e creating the empty group inside the message beeing read (with NoXXX field set to 0). The message serialization and checksum/length calculation inside quickfixj are not consistently treated for NoXXX=0 fields
(i.e: the checksum/length calculation uses the NoXXX=0 field and serialization ignores it).

Fixed: checksum/length calculation in QuickFIX/J for groups having NoXXX=0, in case that the library and getGroups+forwarding is used in a public call.

int calculateLength() {
int result = 0;
int length = 0;
for (Iterator<Field<?>> iter = fields.values().iterator(); iter.hasNext() {
Field<?> field = iter.next();
if (field.getField() == BeginString.FIELD || field.getField() == BodyLength.FIELD

field.getField() == CheckSum.FIELD

isGroupField(field.getField())) { continue; } length = field.getLength(); result += length; } Iterator<Map.Entry<Integer, List<Group>>> iterator = groups.entrySet().iterator(); while (iterator.hasNext()) { Map.Entry<Integer, List<Group>> entry = iterator.next(); List<Group> groupList = entry.getValue(); if (groupList.size() > 0) { // ******* ADDED ******* IntField groupField = new IntField(((Integer) entry.getKey()).intValue()); groupField.setValue(groupList.size()); length = groupField.getLength(); result += length; for (int i = 0; i < groupList.size(); i++) { Group group = (Group) groupList.get(i); length = group.calculateLength(); result += length; } } } return result; } int calculateTotal() { int result = 0; for (Iterator<Field<?>> iter = fields.values().iterator(); iter.hasNext() { Field<?> field = (Field<?>) iter.next(); if (field.getField() == CheckSum.FIELD || isGroupField(field.getField())) { continue; } result += field.getTotal(); }

Iterator<Map.Entry<Integer, List<Group>>> iterator = groups.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<Integer, List<Group>> entry = iterator.next();
List<Group> groupList = entry.getValue();
if (groupList.size() > 0) { // ******* ADDED *******
IntField groupField = new IntField(((Integer) entry.getKey()).intValue());
groupField.setValue(groupList.size());
result += groupField.getTotal();
for (int i = 0; i < groupList.size(); i++)

}
}

return result;
}

(Internal reference: IC_57786)