Issue with fping: not enough sequence numbers available!

[gert.derouck]

Hi,

i'm using zabbix server v5.2.6 on RHEL8.4.

In the serverlog lots of following entries appear; and the related items become unsupported:

3405122:20210910:104110.689 fping failed: fping error: not enough sequence numbers available! (expire_timeout=10, host_nr=6, ping_count=0, seqmap_next_id=0)
3405152:20210910:104113.690 fping failed: fping error: not enough sequence numbers available! (expire_timeout=10, host_nr=5, ping_count=0, seqmap_next_id=0)
3405095:20210910:104116.716 fping failed: fping error: not enough sequence numbers available! (expire_timeout=10, host_nr=6, ping_count=0, seqmap_next_id=0)
3405096:20210910:104136.070 fping failed: fping error: not enough sequence numbers available! (expire_timeout=10, host_nr=5, ping_count=0, seqmap_next_id=0)
3405087:20210910:104144.144 fping failed: fping error: not enough sequence numbers available! (expire_timeout=10, host_nr=5, ping_count=0, seqmap_next_id=0)

Any hint is welcome to solve this...

Regards!

[gert.derouck]

I fixed it by installing an older version of fping.

The original version i was using on rhel8, came from EPEL:

# fping -v
fping: Version 4.2

I replaced it by the version from zabbix unsupported repo: https://repo.zabbix.com/non-supporte...el8.x86_64.rpm

# fping -v
fping: Version 3.16

But with that version another problem appeared:

# fping6 www.google.com
fping6: can't create raw socket (must run as root?) : Address family not supported by protocol

This is probably caused by the fact that ipv6 is disabled on my machine.
Because we don't use IPv6 addresses on our zabbix agents, i worked around this one by emptying Fping6Location in the zabbix server conf file:

# grep -i ^fping6 /etc/zabbix/zabbix_server.conf
Fping6Location=

Cheers!

[tjyang]

I am using 7.0alpha7,RL8.8 and stock fping 4.2. ran into same error message. But after I replaced it with self-compiled fping 5.1 this problem went away.
Pls try fping-5.1, this issue should be zabbix server/proxy independent.