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This looks like a support request. For available options please see http://zabbix.org/wiki/Getting_help.
No indication of a bug. Closing as Won't Fix.
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it is NOT a support request. It IS a bug.
Please do not close but rather investigate.
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is it version 3.4.1 ? could it be ZBX-12549 ?
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It looks like agent is unreachable due to network issues.
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Server - 3.4.1
Agent - 3.4.0
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it looks like but it is NOT.. I can reach the server at that time..
Moreover, the subject host is marked as "unreachable" for 4 days already. If I go to the "Latest data" for that host, there is data collected from it, i.e. Zabbix Server perfectly collects the information from it.
vso it's possible that server cannot ping agent, but agent still sends the data in active mode, it's normal.
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again, the ping is completely fine, the servers are in the same room and VLAN; no network issues.
> ping wpcaldc02
PING wpcaldc02.wpninc.com (10.200.60.12) 56(84) bytes of data.
64 bytes from wpcaldc02.wpninc.com (10.200.60.12): icmp_seq=1 ttl=128 time=0.254 ms
64 bytes from wpcaldc02.wpninc.com (10.200.60.12): icmp_seq=2 ttl=128 time=0.266 ms
64 bytes from wpcaldc02.wpninc.com (10.200.60.12): icmp_seq=3 ttl=128 time=0.278 ms
The server load is zero (see attached).
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and no, it is NOT normal..
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items that are collected, are they active items or only agen.ping passive item fails, while other are also passive ?
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Please provide steps to stable reproduce or ask support from community or subscribe for Zabbix support service.
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All items are passive.
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@palivoda, will provide steps to reproduce. No need to close the ticket without the investigation.
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Could you please provide the following information?
- Configuration of the trigger. Is it a regular trigger from official Template App Zabbix Agent?
- Configuration of items involved. agent.ping in case of official template.
- Latest Data for these items.
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glebs.ivanovskis, the host is defined with a mix of official "Template OS Windows" that linked to the "Template App Zabbix Agent" and a few third party templates.
All requested screenshots are attached. The host latest data is attached in PDF format.
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Agent configuration files
zabbix_agentd.conf:
LogFile=C:\srv\ZabbixAgent\log\zabbix_agentd.log
LogFileSize=5
### Option: DebugLevel
# 0 - basic information about starting and stopping of Zabbix processes
# 1 - critical information
# 2 - error information
# 3 - warnings
# 4 - for debugging (produces lots of information)
# DebugLevel=3
EnableRemoteCommands=0
LogRemoteCommands=1
UnsafeUserParameters=0
Server=zabbix...
ServerActive=
ListenPort=10050
# ListenIP=0.0.0.0
StartAgents=1
Hostname=wpcaldc02
BufferSend=60
BufferSize=200
Timeout=20
Include=C:\srv\ZabbixAgent\conf\conf.d\
conf.d/zbx-win-envmon.conf:
UserParameter=system.discovery[*],%systemroot%\system32\cscript.exe /nologo /T:30 C:\srv\ZabbixAgent\scripts\zabbix_win_system_discovery.vbs $1
UserParameter=quota[*],%systemroot%\system32\cscript.exe /nologo /T:30 C:\srv\ZabbixAgent\scripts\zabbix_win_quota.vbs $1 $2
UserParameter=server.domain,%systemroot%\system32\cscript.exe /nologo /T:30 C:\srv\ZabbixAgent\scripts\zabbix_user_domain.vbs
UserParameter=server.roles,%systemroot%\system32\cscript.exe /nologo /T:30 C:\srv\ZabbixAgent\scripts\zabbix_server_role.vbs
UserParameter=server.serial,%systemroot%\system32\cscript.exe /nologo /T:30 C:\srv\ZabbixAgent\scripts\zabbix_server_serialnumber.vbs
# add to the Task Manager, interval 12-24 hours
# C:\srv\ZabbixAgent\scripts\zabbix_wus_update_all.bat
# C:\srv\ZabbixAgent\scripts\zabbix_wus_update_crit.bat
UserParameter=wu.all,type C:\srv\ZabbixAgent\log\zabbix_wus_update_all.log
UserParameter=wu.crit,type C:\srv\ZabbixAgent\log\zabbix_wus_update_crit.log
conf.d/zbx-win-hwinfo.conf:
# wmic csproduct get vendor,name,identifyingnumber
UserParameter=system.hw.product-name,for /f "usebackq tokens=* skip=1" %a in (`WMIC csproduct get name`) do @echo:%a
UserParameter=system.hw.vendor,for /f "usebackq tokens=* skip=1" %a in (`WMIC csproduct get vendor`) do @echo:%a
UserParameter=system.hw.serial,for /f "usebackq tokens=* skip=1" %a in (`WMIC csproduct get identifyingnumber`) do @echo:%a
conf.d/zbx-win-swinfo.conf:
#UserParameter=vbs.softwareinventoryList[*],cscript /nologo C:\srv\ZabbixAgent\scripts\zbx-softwareinventory.vbs
UserParameter=system.sw.packages,%systemroot%\system32\windowspowershell\v1.0\powershell.exe -nologo C:\srv\ZabbixAgent\scripts\zbx-softwareinventory.ps1
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Is it real parameter ? Or you actually have something else there ?
Server=zabbix...
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vso, it is something else of course 
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here is an example for another Windows Server: another domain controller, so all the configuration and templates are the same as above.
Logs on the Zabbix server:
2017-08-29T19:46:09-06:00 wpmon02 zabbix_server[10818]: Zabbix agent item "net.if.in[WAN Miniport (Network Monitor)-Kaspersky Lab NDIS 6 Filter-0000]" on host "wpdc01" failed: first network error, wait for 15 seconds
2017-08-29T19:46:24-06:00 wpmon02 zabbix_server[10871]: Zabbix agent item "perf_counter["\DNS\Database Node Memory",300]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:46:59-06:00 wpmon02 zabbix_server[10915]: Zabbix agent item "vfs.fs.size[E:,free]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:47:17-06:00 wpmon02 zabbix_server[10862]: Zabbix agent item "net.tcp.listen[636]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:47:35-06:00 wpmon02 zabbix_server[10871]: Zabbix agent item "service_state[DHCPServer]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:47:53-06:00 wpmon02 zabbix_server[10867]: Zabbix agent item "service_state[LanmanWorkstation]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:48:08-06:00 wpmon02 zabbix_server[10869]: Zabbix agent item "service_state[WINS]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:48:26-06:00 wpmon02 zabbix_server[10895]: Zabbix agent item "service_state[AppHostSvc]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:48:43-06:00 wpmon02 zabbix_server[10871]: Zabbix agent item "service_state[Winmgmt]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:48:58-06:00 wpmon02 zabbix_server[10873]: Zabbix agent item "service_state[Winmgmt]" on host "wpdc01" failed: another network error, wait for 15 seconds
2017-08-29T19:49:13-06:00 wpmon02 zabbix_server[10913]: temporarily disabling Zabbix agent checks on host "wpdc01": host unavailable
2017-08-29T19:50:28-06:00 wpmon02 zabbix_server[10897]: enabling Zabbix agent checks on host "wpdc01": host became available
2017-08-30T04:09:53-06:00 wpmon02 zabbix_server[10772]: item "wpdc01:system.sw.packages" became not supported: Timeout while executing a shell script.
2017-08-30T04:19:52-06:00 wpmon02 zabbix_server[10773]: item "wpdc01:system.sw.packages" became supported
We rebooted dc01 last night around 19:46-19:48, so the first lines are fine. Then according to the logs, the connection got restored and data started to be collected (which is true). But according to alerts on the dashboard, it says:
2017-08-29 19:52:00 PROBLEM wpdc01 Zabbix agent on wpdc01 is unreachable for 10 minutes 15h 17m 27s
vso does increase of StartAgents help ? Please increase to 3 and restart agent, then see if issue persists.
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vso, no, but the server restart did.
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Dear alexpr, thank you for exhaustive information! To me this starts to look very much like ZBX-12251. vso, how can we prove or disprove it? grepping server's log by "ignoring query"?
Can you show "500 latest values" for agent.ping? What are other Zabbix agent (passive!) checks on this host?
vso it looks more and more as ZBX-12549, or some strange variation due to StartAgents being 1 it looks almost as if it cannot get to some items, as if there is no queue.
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glebs.ivanovskis, the latest data for agent.ping is attached, both in graph and numerical views.
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Thanks! There is indeed a gap from August 24 to August 30. You say:
Server:
zabbix-server-pgsql 1:3.4.1-1+jessie amd64
But 3.4.1 was released on Monday, August 28. Have you restarted server after upgrade?
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Closing as Duplicate of ZBX-12549.
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yes, I did restart it after the upgrade.
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zabbix_agent_win.png
zabbix_agent_win_7_latest data.pdf