The error message indicates an error in name lookup, not an error in
rsyslog. The first thing you should look at is the order in which name
resolution is to occur as specified on the "hosts" entry in
/etc/nsswitch.conf. If you must rely on DNS (or any network service) to
resolve the name, then you must be prepared for occasional resolution
failures.
If the address for z2500 never changes then you could put an entry for
it in /etc/hosts and list "files" as the first element of the "hosts" entry.
Regards,
On 12/4/18 7:16 AM, sophie.loewenthal--- via rsyslog wrote:
Hi,
This error popped up in the logs:
2018-12-04T14:00:20.567320+01:00 z3001 rsyslogd: omfwd: could not get addrinfo
for hostname 'z2500':'10514': Name or service not known [v8.39.0 try
http://www.rsyslog.com
I have this action configured, and this looks ok to me.
The host can be resolved locally, and I can see traffic sent in tcpdump as
shown below,
# RuleSet
*.info { action (type="omfwd"
target="z2500"
port="10514"
template="ElasticSearchTemplate"
name=" z2500-514-out"
queue.size="1024000"
queue.filename=" z2500-10514.queue"
queue.spoolDirectory="/soft/rsyslog/queues"
queue.maxdiskspace="512m"
queue.type="FixedArray"
queue.maxfilesize="20m"
queue.saveonshutdown="on"
queue.discardseverity="6"
queue.dequeueBatchSize="4096"
queue.workerthreads="2"
queue.workerthreadMinimumMessages="102400"
Action.ResumeInterval="1"
Action.ResumeRetryCount="-1"
)
}
# tcpdump -AttttnnvvS port 10514
# 2018-12-04 14:11:38.249110 IP (tos 0x0, ttl 64, id 5449, offset 0, flags
[DF], proto UDP (17), length 206)
198.168.162.40.41830 > 198.168.87.188.10514: [bad udp cksum 0x0fba ->
0xd235!] UDP, length 178
E....I@.@...
L.(
.W..f).....{"timestamp":"2018-12-04T14:10:01.924663+01:00","message":" Removed slice User Slice of
root.","host":"z2500","severity":"info","facility":"daemon","syslogtag":"systemd:"}
Is something else causing this Name or service not known error message?
Best wishes,
Sophie
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