HLFH [1] filed a deletion request for elasticsearch2 [2]: Elasticsearch 2 has reached EOL in February 2018. Now unsafe package. Better to use elasticsearch or elasticsearch7 AUR or even the opensearch fork but not such an old version.
[1] https://aur.archlinux.org/account/HLFH/ [2] https://aur.archlinux.org/pkgbase/elasticsearch2/
