How do we find the first non-zero packet loss event?

[mk197m]

example dated newest to oldest :
{ "ip_address": "255.255.255.255","loss_pct": 0, "device_id": "ABC"}
{ "ip_address": "255.255.255.255","loss_pct": 10, "device_id": "ABC"}
{ "ip_address": "255.255.255.255","loss_pct": 20, "device_id": "ABC"}
{ "ip_address": "255.255.255.255","loss_pct": 0, "device_id": "ABC"}

{ "ip_address": "255.255.255.255","loss_pct": 20, "device_id": "XYZ"}
{ "ip_address": "255.255.255.255","loss_pct": 20, "device_id": "XYZ"}
{ "ip_address": "255.255.255.255","loss_pct": 0, "device_id": "XYZ"}
{ "ip_address": "255.255.255.255","loss_pct": 20, "device_id": "XYZ"}

{ "ip_address": "255.255.255.255","loss_pct": 10, "device_id": "PQR"}
{ "ip_address": "255.255.255.255","loss_pct": 10, "device_id": "PQR"}

{ "ip_address": "255.255.255.255","loss_pct": 50, "device_id": "AAA"}
{ "ip_address": "255.255.255.255","loss_pct": 0, "device_id": "AAA"}
{ "ip_address": "255.255.255.255","loss_pct": 20, "device_id": "AAA"}
{ "ip_address": "255.255.255.255","loss_pct": 0, "device_id": "AAA"}
{ "ip_address": "255.255.255.255","loss_pct": 100, "device_id": "AAA"}
{ "ip_address": "255.255.255.255","loss_pct": 0, "device_id": "AAA"}

expected output:
{ "ip_address": "255.255.255.255","loss_pct": 20, "device_id": "XYZ"}
{ "ip_address": "255.255.255.255","loss_pct": 50, "device_id": "AAA"}

Notice : if newest packet loss zero then exclude. if packet loss zero has not seen within the search result then exclude. if packet lost swap few times then take take first newest non zero pack lost

[mk197m]

i am interested to get records which as more then 0 pact lost right after zero. four highlighted records is desire output for me.

Any help thanks 🙂

[DalJeanis · Accepted solution]

Try this.

| fields ip_address device_id loss_pct 
| eventstats min(loss_pct) as minloss max(loss_pct) as maxloss first(loss_pct) as currloss by ip_address device_id  
| streamstats count as firstcount by ip_address device_id 
| where currloss>0 AND minloss=0 AND firstcount=1

Since you have not shown a _time field, I am assuming there is none, and am assuming that the newest event will be first in the order that events are returned.

(I generally prefer to use latest() rather than first() or last().)