Since my PGP key has been expired, the release signatures has been broken
for a while. So, I urgently created the jira  and updated the signatures.
All signatures and artifacts are at:https://dist.apache.org/repos/dist/dev/tajo/
The KEYS file containing the PGP keys used to sign all releases can be
found at http://people.apache.org/keys/group/tajo.asc
Please review them and vote. The vote will be open for at least 72 hours. Here
is my +1.