zabbix sender fails with large file

[hkjarral]

Hello,

I have been struggling with zabbix_sender for sending a file with more than 12 values. Uptill 12-15 values it works fine, server can receive values parse it and everything but as soon as file has more than 20 entries it fails.

zabbix_sender -vv   -z 192.168.X.X-p 10051  -i  zbx-ceph-osds.RXgvlHn8HR4 
zabbix_sender [1945223]: DEBUG: answer []
zabbix_sender [1945223]: Warning: incorrect answer from server []
Sending failed.

  cat zbx-ceph-osds.RXgvlHn8HR4 
hosting-x.domain.com ceph.osdspaceavail[osd.3] 139.73577880859375
hosting-x.domain.com ceph.osdspaceavail[osd.4] 82.3427734375
hosting-x.domain.com ceph.osdspaceavail[osd.5] 92.45989990234375
hosting-x.domain.com ceph.osdspaceavail[osd.0] 82.10772705078125
hosting-x.domain.com ceph.osdspaceavail[osd.1] 85.06463623046875
hosting-x.domain.com ceph.osdspaceavail[osd.2] 113.3829345703125
hosting-x.domain.com ceph.osdspaceavail[osd.8] 97.68695068359375
hosting-x.domain.com ceph.osdspaceavail[osd.9] 122.2645263671875
hosting-x.domain.com ceph.osdspaceavail[osd.10] 91.3482666015625
hosting-x.domain.com ceph.osdspaceavail[osd.6] 99.08160400390625
hosting-x.domain.com ceph.osdspaceavail[osd.7] 98.67034912109375
hosting-x.domain.com ceph.osdspaceavail[osd.11] 76.7340087890625
hosting-x.domain.com ceph.spaceavail 1180.8794555664062
hosting-x.domain.com ceph.spacetotal 5364.021286010742
hosting-x.domain.com ceph.osdstatus[osd.0] 1
hosting-x.domain.com ceph.osdstatus[osd.1] 1
hosting-x.domain.com ceph.osdstatus[osd.2] 1
hosting-x.domain.com ceph.osdstatus[osd.3] 1
hosting-x.domain.com ceph.osdstatus[osd.4] 1
hosting-x.domain.com ceph.osdstatus[osd.5] 1
hosting-x.domain.com ceph.osdstatus[osd.6] 1
hosting-x.domain.com ceph.osdstatus[osd.7] 1
hosting-x.domain.com ceph.osdstatus[osd.8] 1
hosting-x.domain.com ceph.osdstatus[osd.9] 1
hosting-x.domain.com ceph.osdstatus[osd.10] 1
hosting-x.domain.com ceph.osdstatus[osd.11] 1
hosting-x.domain.com ceph.osdcount 12

#zabbix_sender -V
zabbix_sender (Zabbix) 3.4.15
Revision 86739 12 November 2018, compilation time: Nov 12 2018 09:35:45
Copyright (C) 2018 Zabbix SIA
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it according to
the license. There is NO WARRANTY, to the extent permitted by law.

This product includes software developed by the OpenSSL Project
for use in the OpenSSL Toolkit (http://www.openssl.org/).

Compiled with OpenSSL 1.1.0f 25 May 2017
Running with OpenSSL 1.1.0k 28 May 2019


#zabbix_server --version
zabbix_server (Zabbix) 3.4.15
Revision 86739 12 November 2018, compilation time: Nov 12 2018 10:55:19
Copyright (C) 2018 Zabbix SIA
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it according to
the license. There is NO WARRANTY, to the extent permitted by law.

This product includes software developed by the OpenSSL Project
for use in the OpenSSL Toolkit (http://www.openssl.org/).

Compiled with OpenSSL 1.0.1e-fips 11 Feb 2013
Running with OpenSSL 1.0.1e-fips 11 Feb 2013

[hkjarral]

Anyone seen this or is it just me

[andris]

"incorrect answer from server" means that server responded with not an expected answer in JSON format. You can try to look into Zabbix server log. If there is nothing you can try to increase DebugLevel for trapper processes.

[hkjarral]

Nothing in the zabbix server log altough I do see it when I try via tcpdump.

[hkjarral]

Ok I figured it out. It was different MTU size on zabbix server.