this morning I did a dnf upgrade and clamav was upgraded, since then clamav will not stay running, the output from "journalctl -xef |grep clamd".  Notice clamav finishes starting up but upon receiving a file to process it simply closes.

System is Fedora 28  and  clamd --version -c /etc/clamd.d/exim.conf returns:

ClamAV 0.100.0/24656/Tue Jun 12 08:35:50 2018

Jun 12 13:33:39 myhost.com clamd[11931]: BlockMax heuristic detection disabled.
Jun 12 13:33:39 myhost.com clamd[11931]: Algorithmic detection enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: Portable Executable support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: ELF support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: Mail files support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: OLE2 support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: PDF support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: SWF support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: HTML support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: XMLDOCS support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: HWP3 support enabled.
Jun 12 13:33:39 myhost.com clamd[11931]: Self checking every 600 seconds.
Jun 12 13:33:39 myhost.com clamd[11931]: Listening daemon: PID: 11931
Jun 12 13:33:39 myhost.com clamd[11931]: MaxQueue set to: 100
Jun 12 13:33:39 myhost.com clamd[11931]: fds_poll_recv: timeout after 600 seconds
-- Subject: Unit clamd.exim.service has finished start-up
-- Unit clamd.exim.service has finished starting up.
Jun 12 13:33:41 myhost.com audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=clamd.exim comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Jun 12 13:35:08 myhost.com clamd[11931]: Received POLLIN|POLLHUP on fd 6
Jun 12 13:35:08 myhost.com clamd[11931]: Got new connection, FD 11
Jun 12 13:35:08 myhost.com clamd[11931]: Received POLLIN|POLLHUP on fd 7
Jun 12 13:35:08 myhost.com clamd[11931]: fds_poll_recv: timeout after 5 seconds
Jun 12 13:35:08 myhost.com clamd[11931]: Received POLLIN|POLLHUP on fd 11
Jun 12 13:35:08 myhost.com clamd[11931]: got command SCAN /var/spool/exim/scan/1fSnCF-000388-Is/1fSnCF-000388-Is.eml (63, 5), argument: /var/spool/exim/scan/1fSnCF-000388-Is/1fSnCF-000388-Is.eml
Jun 12 13:35:08 myhost.com clamd[11931]: mode -> MODE_WAITREPLY
Jun 12 13:35:08 myhost.com clamd[11931]: Breaking command loop, mode is no longer MODE_COMMAND
Jun 12 13:35:08 myhost.com clamd[11931]: Consumed entire command
Jun 12 13:35:08 myhost.com clamd[11931]: Number of file descriptors polled: 1 fds
Jun 12 13:35:08 myhost.com clamd[11931]: fds_poll_recv: timeout after 600 seconds
Jun 12 13:35:08 myhost.com clamd[11931]: THRMGR: queue (single) crossed low threshold -> signaling
Jun 12 13:35:08 myhost.com clamd[11931]: THRMGR: queue (bulk) crossed low threshold -> signaling
Jun 12 13:35:08 myhost.com audit[11931]: ANOM_ABEND auid=4294967295 uid=93 gid=93 ses=4294967295 pid=11931 comm="clamd" exe="/usr/sbin/clamd" sig=6 res=1
Jun 12 13:35:08 myhost.com systemd[1]: clamd.exim.service: Main process exited, code=killed, status=6/ABRT
Jun 12 13:35:08 myhost.com systemd[1]: clamd.exim.service: Failed with result 'signal'.
Jun 12 13:35:08 myhost.com audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=clamd.exim comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed'