Hello, you can create a PR proposing the downgrade of the WARN messages to INFO, if it happens to be harmless according to your tests.
The "unsafe" is just an internal name of the particular function referring to its working method related to the other function. Cheers, Henning > -----Original Message----- > From: JR Richardson via sr-users <sr-users@lists.kamailio.org> > Sent: Freitag, 13. Juni 2025 18:29 > To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org> > Cc: JR Richardson <jmr.richard...@gmail.com> > Subject: [SR-Users] Re: dns_hash_put(): unlinked item errors > > > > On Jun 10, 2025, at 4:00 PM, JR Richardson via sr-users <sr- > us...@lists.kamailio.org> wrote: > > > > > > Hey Folks, > > > > > > Running kamailio 5.8.4, haven't needed or used DNS functions > > > previously but recently completed clearip integration, which > > > requires sip request to use URL instead of IP and resolve where to > > > send request. Within hours of adding URL lookups I started getting > > > dns_hash unlinked errors. I correlated the log errors to when the > > > URL changed IP. I assume the caching is working because kamailio > > > sends to the same IP for a few minutes, then switches IP, sends to > > > new IP for a few minutes, then switches IP again and this activity > continues. > > > > > > Here are some log errors: > > > > > > switch IP > > > Jun 10 14:14:17 siprouter1-pve186 /usr/local/sbin/kamailio[8111]: > > > WARNING: <core> [core/dns_cache.c:170]: dns_hash_put(): unlinked > > > item > > > 0x7fa0f9b9fcc0 > > > Jun 10 14:14:19 siprouter1-pve186 /usr/local/sbin/kamailio[8122]: > > > WARNING: <core> [core/dns_cache.c:185]: dns_hash_put_shm_unsafe(): > > > unlinked item 0x7fa0f9b9fcc0 > > > > > > switch IP > > > Jun 10 14:15:00 siprouter1-pve186 /usr/local/sbin/kamailio[8111]: > > > WARNING: <core> [core/dns_cache.c:170]: dns_hash_put(): unlinked > > > item > > > 0x7fa0f9b9ee00 > > > Jun 10 14:15:03 siprouter1-pve186 /usr/local/sbin/kamailio[8122]: > > > WARNING: <core> [core/dns_cache.c:185]: dns_hash_put_shm_unsafe(): > > > unlinked item 0x7fa0f9b9ee00 > > > > > > switch IP > > > Jun 10 14:15:33 siprouter1-pve186 /usr/local/sbin/kamailio[8110]: > > > WARNING: <core> [core/dns_cache.c:170]: dns_hash_put(): unlinked > > > item > > > 0x7fa0f9b8e640 > > > Jun 10 14:15:33 siprouter1-pve186 /usr/local/sbin/kamailio[8122]: > > > WARNING: <core> [core/dns_cache.c:185]: dns_hash_put_shm_unsafe(): > > > unlinked item 0x7fa0f9b8e640 > > > > > > switch IP > > > Jun 10 14:20:37 siprouter1-pve186 /usr/local/sbin/kamailio[8109]: > > > WARNING: <core> [core/dns_cache.c:170]: dns_hash_put(): unlinked > > > item > > > 0x7fa0f9b3eb60 > > > > > > switch IP > > > Jun 10 14:21:12 siprouter1-pve186 /usr/local/sbin/kamailio[8117]: > > > WARNING: <core> [core/dns_cache.c:170]: dns_hash_put(): unlinked > > > item > > > 0x7fa0f9b830f0 > > > Jun 10 14:21:23 siprouter1-pve186 /usr/local/sbin/kamailio[8122]: > > > WARNING: <core> [core/dns_cache.c:185]: dns_hash_put_shm_unsafe(): > > > unlinked item 0x7fa0f9b830f0 > > > > > > Here are my DNS config parameters, nothing I've changed made any > > > difference. And as far as I can tell I'm not dropping any clearip > > > queries. > > > dns=no > > > rev_dns=no > > > use_dns_failover=on > > > dns_try_ipv6=no > > > > > > I did find a patch update for this error back from 2023 and the > > > patch is in my /src/core/dns_cache.c as expected but still getting errors. > > > > > > Any guidance in clearing this error? > > > > > > Thanks. > > > JR > > > > > > Not an answer to your question, but to use failover, use_dns_cache (I > believe) needs to be on. > > > > https://github.com/kamailio/kamailio/blob/master/doc/tutorials/dns.txt > > > > Fred Posner > > Hi Fred, > > I read through the DNS docs and believe I have a good understanding, > dns_cache is on my default so you don't have to explicitly define it in the > config. After further diagnosis I found the dns errors > "dns_hash_put(): unlinked item" happen at the same time the DNS query goes > out (around 4min30sec to 5min intervals) but the errors in the log don't > happen on every DNS query, they only appear when the URL IP changes. > > This is what I'm seeing, matching timestamps to DNS queries and SIP Invites to > clearip. > DNS query clearip.com IP#1 no error > DNS query clearip.com IP#1 no error > DNS query clearip.com IP#2 error > DNS query clearip.com IP#1 error > DNS query clearip.com IP#1 no error > DNS query clearip.com IP#2 error > DNS query clearip.com IP#2 no error > DNS query clearip.com IP#2 no error > DNS query clearip.com IP#1 error > > Because I'm not seeing any performance or SIP processing issues, I now > believe the log entry is a false positive and can be disregarded, I mean it > is a > warning, but there is no ill effect as far as I can tell, just a lot of log > messages, > maybe this message should be downgraded to informational? > WARNING: <core> [core/dns_cache.c:170]: dns_hash_put(): unlinked item > ...... > WARNING: <core> [core/dns_cache.c:185]: dns_hash_put_shm_unsafe(): > unlinked item ...... *****(why is this one "shm_unsafe") > > Thanks. > > JR > __________________________________________________________ > Kamailio - Users Mailing List - Non Commercial Discussions -- sr- > us...@lists.kamailio.org To unsubscribe send an email to sr-users- > le...@lists.kamailio.org > Important: keep the mailing list in the recipients, do not reply only to the > sender! __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions -- sr-users@lists.kamailio.org To unsubscribe send an email to sr-users-le...@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender!
