c2s error: c2s.c:178 sm for domain 'xxx.yyy.com' is not online

[yinbo-wang]

Hi,
After started jabberd on OL6 (jabberd DB is on the same machine), found the following errors with c2s, please advise what would be the problem and how to trouble shooting. Thank you.
...
C2S : sx (io.c:357) 7 ready for writing
C2S : sx (io.c:312) encoding 257 bytes for writing: <stream:stream xmlns:stream='http://etherx.jabber.org/streams' xmlns='jabber:client' from='xxx.yyy.com' version='1.0' id='2ktu33k3sxkfrbst5n0uxbqb67crdo9g93ac7ugz' xmlns:ack='http://www.xmpp.org/extensions/xep-0198.html#ns'>
C2S : sx (chain.c:79) calling io write chain
C2S : sx (io.c:378) handing app 257 bytes to write
C2S : sx (io.c:379) tag 7 event 3 data 0x1497990
C2S : Thu Jan 25 14:32:00 2018 c2s.c:113 writing to 7
C2S : Thu Jan 25 14:32:00 2018 c2s.c:117 257 bytes written
C2S : sx (server.c:29) stream established
C2S : sx (server.c:39) 7 state change from 1 to 3
C2S : sx (server.c:40) tag 7 event 4 data 0x0
C2S : Thu Jan 25 14:32:00 2018 c2s.c:178 sm for domain 'xxx.yyy.com' is not online
C2S : sx (error.c:79) prepared error: <stream:error xmlns:stream='http://etherx.jabber.org/streams'>session manager for requested domain is not available</stream:error>
C2S : sx (error.c:100) tag 7 event 1 data 0x0
C2S : Thu Jan 25 14:32:00 2018 c2s.c:42 want write
C2S : Thu Jan 25 14:32:00 2018 c2s.c:529 write action on fd 7
C2S : sx (io.c:357) 7 ready for writing
C2S : sx (io.c:312) encoding 243 bytes for writing: <stream:error xmlns:stream='http://etherx.jabber.org/streams'>session manager for requested domain is not available</stream:error>
C2S : sx (chain.c:79) calling io write chain
C2S : sx (io.c:378) handing app 243 bytes to write
C2S : sx (io.c:379) tag 7 event 3 data 0x14b71c0
...