private boolean containsRecoverRTSG() {
        for (RTSGroup rtsg : rtsGroups.values()) {
            if (rtsg.isRecovering()) {
                return true;
            }
        }
        return false;
    }
Close this realtime table. Job is done.
This method only called before process exit.
indexr-segment/src/main/java/io/indexr/segment/rt/RealtimeTable.java