Hi

I use kamailio 4.0.3 with presence. I sometimes get these errors:

Oct  4 09:26:24 server /usr/sbin/kamailio[1292]: ERROR: presence
[publish.c:171]: msg_presentity_clean(): Marking presentity
Oct  4 09:26:34 server /usr/sbin/kamailio[1292]: ERROR: db_mysql
[km_dbase.c:122]: db_mysql_submit_query(): driver error on query:
Duplicate entry 'username-domain-presence-*#-OFFLINE-#*' for key
'presentity_idx'
Oct  4 09:26:34 server /usr/sbin/kamailio[1292]: ERROR: <core>
[db_query.c:337]: db_do_update(): error while submitting query
Oct  4 09:26:34 server /usr/sbin/kamailio[1292]: ERROR: presence
[presentity.c:1281]: mark_presentity_for_delete(): unsuccessful sql
update operation

This is when multiple SIP clients are registered using the same
credentials, they each have a presentity entry, with the same username
and domain but different etags, which is fine. But when they expire, the
presentity.etag will be filled with '*#-OFFLINE-#*', and when both
expire at about the same time, kamailio tries to fill both with the same
'*#-OFFLINE-#*' etag. Because presentity table has a 'CONSTRAINT
presentity_idx UNIQUE (username, domain, event, etag)', this gives the
errors.

Should the constraint be removed to cope with this situation?

Thank you!
Yufei


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Yufei Tao
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