Issue with nodata trigger expression

[gsbiju]

I have created three triggers using host items. The following are the expressions

Trigger 1:
1) {master:heapmem.nodata(240)}=1&{slave:heapmem.noda ta(240)}=1 -> this is to check data did come through in the past 240 secs
Trigger 2:
2) {master:heapmem.max(61,0)}=0 -> Check whether the heapmem is 0 in the past 61 secs
Trigger 3:
3) {slave:heapmem.max(61,0)}=0 -> Check whether the heapmem is 0 in the past 61 secs

For some reason the trigger #1 is getting enabled (triggered) even though the data is coming in every 60 seconds. I can see the data in the "latest data" in raw format and graphically. Any thoughts on why this is happening.

Even if trigger 1 is created without the & condition i.e. with only one expression say {master:heapmem.nodata(240)}=1, trigger events are getting generated even when data is received every 60 seconds.

The data is end to zabbix using zabbix_sender. Any reason for this behavior? Is there an issue with the trigger expression or is it a bug?

[filipp.sudanov]

Is Trigger1 always in PROBLEM state, or it goes from PROBLEM to OK and back all the time?

[gsbiju]

Is Trigger1 always in PROBLEM state, or it goes from PROBLEM to OK and back all the time?

Trigger1 switches between PROBLEM and OK state often. But there is no consistent pattern in the time period between the switch in states.