after working good for some weeks: Zabbix agent is not available

[[email protected]]

title says it all, a monitored host with Server 2022 OS was reporting well for some weeks and now suddenly says: Zabbix agent is not available


Zabbix version: 6.4.1
installed agent on Server 2022 host is: 64bit version 6.4.1.2400

What could be the reason for this sudden stop-working ?

Marc

[max_bz]

For a start - could you restart the agent and provide server and agent logs?
c:\Program Files\Zabbix Agent\zabbix agentd.log as example

You can even increase the log level

zabbix_agentd -R log_level_increase​

[[email protected]]

on the system event log (of the monitored host) I can see the following : Event 7034: The Zabbix Agent service terminated unexpectedly. It has done this 1 time(s).

on the application log I can see this:
Event 1000:
Faulting application name: zabbix_agentd.exe, version: 6.4.1.2400, time stamp: 0x642a9328
Faulting module name: ntdll.dll, version: 10.0.20348.1668, time stamp: 0x069a4bfa
Exception code: 0xc0000374
Fault offset: 0x0000000000103fd9
Faulting process id: 0xc18
Faulting application start time: 0x01d987e6e9ace083
Faulting application path: C:\Program Files\Zabbix Agent\zabbix_agentd.exe
Faulting module path: C:\Windows\SYSTEM32\ntdll.dll
Report Id: e7904dc8-67d4-4243-9879-82d6bad848a2
Faulting package full name:
Faulting package-relative application ID:

[max_bz]

Hi,
Please check the zabbix agent log itself. It should be much more detailed

[[email protected]]

1916:20230512:161023.081 Unhandled exception 800706ba detected at 0x00007FFB75D58D5C. Crashing ...
1916:20230512:161023.081 ====== Fatal information: ======
1916:20230512:161023.081 Program counter: 0x75d58d5c
1916:20230512:161023.081 === Registers: ===
1916:20230512:161023.081 r8 = 7ffb77eff970 = 140718025734512 = 140718025734512
1916:20230512:161023.081 r9 = 12a3180 = 19542400 = 19542400
1916:20230512:161023.081 r10 = 436d2a0 = 70701728 = 70701728
1916:20230512:161023.081 r11 = 4fa8860 = 83527776 = 83527776
1916:20230512:161023.081 r12 = 0 = 0 = 0
1916:20230512:161023.081 r13 = 140097f60 = 5369331552 = 5369331552
1916:20230512:161023.082 r14 = 14 = 20 = 20
1916:20230512:161023.082 r15 = 7ffb6d171aa0 = 140717843749536 = 140717843749536
1916:20230512:161023.082 rdi = 126d3b8 = 19321784 = 19321784
1916:20230512:161023.082 rsi = 436d8d0 = 70703312 = 70703312
1916:20230512:161023.082 rbp = 7ffb6d172d50 = 140717843754320 = 140717843754320
1916:20230512:161023.082 rbx = 800706ba = 2147944122 = 2147944122
1916:20230512:161023.082 rdx = 7ffb789808f7 = 140718036748535 = 140718036748535
1916:20230512:161023.082 rax = 0 = 0 = 0
1916:20230512:161023.082 rcx = 70 = 112 = 112
1916:20230512:161023.082 rsp = 436d6a0 = 70702752 = 70702752
1916:20230512:161023.082 efl = 206 = 518 = 518
1916:20230512:161023.082 csgsfs = 332b5300 = 858477312 = 858477312
1916:20230512:161023.082 === Backtrace: ===
1916:20230512:161023.120 15: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(RaiseException+0x6c) [0x75d58d5c]
1916:20230512:161023.120 14: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(RpcRaiseException+0x51) [0x77eff5e1]
1916:20230512:161023.120 13: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(RpcRaiseException+0x14) [0x77eff5a4]
1916:20230512:161023.120 12: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(NdrpFindInterface+0x255f) [0x7826f54f]
1916:20230512:161023.121 11: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(RpcAsyncCompleteCall+0x528 ) [0x77fc65d8]
1916:20230512:161023.121 10: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(NdrpFindInterface+0x1484) [0x7826e474]
1916:20230512:161023.121 9: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(ObjectStublessClient32+0x7 e42) [0x780f16f2]
1916:20230512:161023.121 8: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(CWbemGuidToClassMap::~CWbe mGuidToClassMap+0x2d9) [0x6d46d559]
1916:20230512:161023.122 7: C:\Program Files\Zabbix Agent\zabbix_agentd.exe() [0x400994c5]
1916:20230512:161023.122 6: C:\Program Files\Zabbix Agent\zabbix_agentd.exe() [0x40098de1]
1916:20230512:161023.122 5: C:\Program Files\Zabbix Agent\zabbix_agentd.exe() [0x4009a953]
1916:20230512:161023.122 4: C:\Program Files\Zabbix Agent\zabbix_agentd.exe() [0x400a629d]
1916:20230512:161023.123 3: C:\Program Files\Zabbix Agent\zabbix_agentd.exe() [0x400a614c]
1916:20230512:161023.123 2: C:\Program Files\Zabbix Agent\zabbix_agentd.exe() [0x40221644]
1916:20230512:161023.123 1: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(BaseThreadInitThunk+0x22) [0x787b1412]
1916:20230512:161023.124 0: C:\Program Files\Zabbix Agent\zabbix_agentd.exe(RtlUserThreadStart+0x34) [0x78965504]