debugging the old Blutmagie Perl scripts I found all routers like splitDNA running Tor 0.2.7.2 sending two hash values in the extra-info-digest. I suppose this isn't expected by the script parsing the data.

GETINFO desc/name/splitDNA 250+desc/name/splitDNA= router splitDNA 62.210.82.44 21 0 143 [...] extra-info-digest D6F7A98078BDA327D388D918EBA92D0FC9EDC487 nMA7WhPSpQmquUdYpwIdQtdcKvTAcvNDnXleiPBia0U

It shouldn't be expected by the script: https://gitweb.torproject.org/torspec.git/tree/dir-spec.txt ------------------------------------------------------------------ "extra-info-digest" digest NL

[At most once]

"Digest" is a hex-encoded digest (using upper-case characters) of the router's extra-info document, as signed in the router's extra-info (that is, not including the signature). (If this field is absent, the router is not uploading a corresponding extra-info document.) -------------------------------------------------------------------

Fetching descriptors via: http://<DIR_SERVER>/tor/server/all

has 2 values for extra-info-digest as well.