in src/main/java/com/googlesource/gerrit/plugins/events/StreamEvents.java [148:159]
protected void initSent() throws IOException {
long head = events.getHead();
long tail = events.getTail();
if (resume == -1 || resume > head) {
sent = head;
} else {
sent = resume;
}
if (sent < tail) {
sent = tail - 1;
}
}