This is not a solution since SNMP v3 is required for encrypted checks (e.g. over the internet).
Having the same problem with the zfs-linux and seafile app plugin.
Feb 12 12:46:04 host sudo[1237]: Debian-snmp : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/etc/snmp/scripts/zfs-linux
Feb 12 12:46:04 host sudo[1237]: pam_unix(sudo:session): session opened for user root by (uid=0)
Feb 12 12:46:04 host sudo[1237]: pam_unix(sudo:session): session closed for user root
Feb 12 12:46:04 host snmpd[3460]: send response: Too long
Feb 12 12:46:04 host snmpd[3460]: -- iso.3.6.1.4.1.8072.1.3.2.3.1.2.3.122.102.115
Do we have a solution for this?