[ZBX-5731] No data trigger going off even though data received sooner. Created: 2012 Oct 24  Updated: 2017 May 30  Resolved: 2013 Jul 23

Status: Closed
Project: ZABBIX BUGS AND ISSUES
Component/s: Server (S)
Affects Version/s: 2.0.2
Fix Version/s: None

Type: Incident report Priority: Major
Reporter: Mikhail Dobrinin Assignee: Unassigned
Resolution: Cannot Reproduce Votes: 0
Labels: event, proxy, server, trigger
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified
Environment:

Server appliance, proxy running on Ubuntu 12.04


Attachments: JPEG File Trigger Events.jpg    

 Description   

Host monitored by JMX through active proxy.
Two items:
jmx[java.lang:type=Runtime,Uptime] stored AS-IS checked 5m
jmx["java.lang:type=Runtime","Uptime"] stored DELTA SIMPLE CHANGE checked 30s

Active proxy forwards data to server every 30s:

28446:20121023:132855.568
In send_data_to_server ...
28446:20121023:132925.833
In send_data_to_server ...

Server is receiving data every 30s. A view of the Latest Data page:

2012.Oct.23 15:44:39	30077
2012.Oct.23 15:44:09	30150
2012.Oct.23 15:43:39	30034
2012.Oct.23 15:43:09	30078
2012.Oct.23 15:42:39	29926
2012.Oct.23 15:42:10	29225
2012.Oct.23 15:41:40	30082
2012.Oct.23 15:41:10	30082
2012.Oct.23 15:40:40	30089
2012.Oct.23 15:40:10	30190
2012.Oct.23 15:39:40	30018

The trigger:

{HOSTNAME} is not reachable - {JMX Generic:jmx["java.lang:type=Runtime","Uptime"].nodata(45)}=1

Trigger is going off:

23 Oct 2012 15:44:09	ProxyJMXTest is not reachable	OK	High	51s	No
23 Oct 2012 15:43:00	ProxyJMXTest is not reachable	PROBLEM	High	1m 9s	No	
23 Oct 2012 15:42:10	ProxyJMXTest is not reachable	OK	High	50s	No	
23 Oct 2012 15:42:31	ProxyJMXTest is not reachable	PROBLEM	High	21s	No	
23 Oct 2012 15:41:40	ProxyJMXTest is not reachable	OK	High	51s	No	
23 Oct 2012 15:42:00	ProxyJMXTest is not reachable	PROBLEM	High	20s	No	
23 Oct 2012 15:41:10	ProxyJMXTest is not reachable	OK	High	50s	No	
23 Oct 2012 15:41:30	ProxyJMXTest is not reachable	PROBLEM	High	20s	No	
23 Oct 2012 15:40:40	ProxyJMXTest is not reachable	OK	High	50s	No	
23 Oct 2012 15:41:00	ProxyJMXTest is not reachable	PROBLEM	High	20s	No	
23 Oct 2012 15:40:10	ProxyJMXTest is not reachable	OK	High	50s	No	
23 Oct 2012 15:40:30	ProxyJMXTest is not reachable	PROBLEM	High	20s	No	
23 Oct 2012 15:39:40	ProxyJMXTest is not reachable	OK	High	50s	No	
23 Oct 2012 15:40:00	ProxyJMXTest is not reachable	PROBLEM	High	20s	No	
23 Oct 2012 15:39:09	ProxyJMXTest is not reachable	OK	High	51s	No	
23 Oct 2012 15:39:30	ProxyJMXTest is not reachable	PROBLEM	High	21s	No

Trigger appears to be unstable. Sometimes it is in OK state for a while:

24 Oct 2012 11:29:41	ProxyJMXTest is not reachable		High	10m 38s	No	
-4 Oct 2012 10:29:00	ProxyJMXTest is not reachable	PROBLEM	High	1h 41s	No	
24 Oct 2012 10:28:11	ProxyJMXTest is not reachable	OK	High	49s	No	
24 Oct 2012 10:28:30	ProxyJMXTest is not reachable	PROBLEM	High	19s	No	
24 Oct 2012 10:27:41	ProxyJMXTest is not reachable	OK	High	49s	No


 Comments   
Comment by Mikhail Dobrinin [ 2012 Oct 24 ]

The last part should be:

 
24 Oct 2012 12:50:30	ProxyJMXTest is not reachable		High	19s	No	
24 Oct 2012 12:49:41	ProxyJMXTest is not reachable		High	49s	No	
24 Oct 2012 12:50:00	ProxyJMXTest is not reachable		High	19s	No	
24 Oct 2012 12:49:11	ProxyJMXTest is not reachable		High	49s	No	
24 Oct 2012 12:49:30	ProxyJMXTest is not reachable		High	19s	No	
24 Oct 2012 12:48:41	ProxyJMXTest is not reachable		High	49s	No	
24 Oct 2012 12:49:00	ProxyJMXTest is not reachable		High	19s	No	
24 Oct 2012 11:29:41	ProxyJMXTest is not reachable	OK	High	1h 19m 19s	No	
24 Oct 2012 10:29:00	ProxyJMXTest is not reachable	PROBLEM	High	1h 41s	No<<<<<Machine went off the network
Comment by Mikhail Dobrinin [ 2012 Oct 24 ]

The number of items does not affect the problem from arising. I originally included that information because before further investigation I thought that may have contributed to the problem. With one item polled every 30 seconds there is still the trigger event going off:

24 Oct 2012 13:36:30	ProxyJMXTest is not reachable		High	20s	No	
24 Oct 2012 13:35:40	ProxyJMXTest is not reachable		High	50s	No	
24 Oct 2012 13:36:00	ProxyJMXTest is not reachable		High	20s	No	
24 Oct 2012 13:35:10	ProxyJMXTest is not reachable		High	50s	No	
24 Oct 2012 13:35:30	ProxyJMXTest is not reachable		High	20s	No	
24 Oct 2012 13:34:40	ProxyJMXTest is not reachable		High	50s	No	
Comment by richlv [ 2012 Oct 25 ]

why send data every 30 seconds only ? default is one second...

most likely proxy is unable to transmit all collected data quickly/timely enough, and it arrives in server with a delay.

the timestamps you see for item values are assigned on the proxy, they are not indicating when server received the values.

i'd suggest reducing the data sending interval to 1, 5 or even 10 seconds and seeing whether the problem goes away.

Comment by Mikhail Dobrinin [ 2012 Oct 25 ]

Indeed that solves the problem. However, even when the rate is 30 seconds, it appears that the proxy transmits the data just fine. I've tested it with a single host monitored with a single item and the problem exists.

Comment by richlv [ 2012 Oct 25 ]

is that a single host with single item on a single proxy, and the only thing monitored by a server ?

Comment by Alexei Vladishev [ 2013 Jul 23 ]

I am closing it for now, feel free to reopen in case of any news.

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