private void reportFail(final byte[] relatedKey) {
        if (LOG.isErrorEnabled()) {
            LOG.error("There is a high probability that the data in the region table is corrupted.");
            LOG.error("---------------------------------------------------------------------------");
            LOG.error("* RelatedKey:  {}.", BytesUtil.toHex(relatedKey));
            LOG.error("* RangeTable:  {}.", this.rangeTable);
            LOG.error("* RegionTable: {}.", this.regionTable);
            LOG.error("---------------------------------------------------------------------------");
        }
    }
Returns the startKey of next region.
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/client/RegionRouteTable.java