Open wladimirleite opened 1 week ago
Out of curiosity, the problem is caused when we try to sort items and some of them don't have a "linear" order (A > B, B > C and C > A).
The comparator used by the WhatsAppParser
is something like:
public int compareTo(Message o) {
if (a != 0 && o.a != 0) {
int cmp = Integer.compare(a, o.a);
if (cmp != 0) return cmp;
}
if (b != 0 && o.b != 0) {
int cmp = Integer.compare(b, o.b);
if (cmp != 0) return cmp;
}
return Integer.compare(c, o.c);
}
If we have items like X = {a=0, b=2, c=1}, Y = {a=2, b=1, c=0}, Z = {a=1, b=0, c=2}, then: X > Y, Y > Z and Z > X, which will cause an exception if we try to sort them (in fact, there must be at least 32 items, so the merge function is used).
Another user reported the following error (it happens both with 4.1.x and master). Analysing the database, the issue is caused by the way messages are sorted. It may fail when a very specific combination of records (with zeroes or null values in the columns used) is present, which is the case of the triggering database. I will submit a fix shortly.