Error: index_not_found_exception - elasticsearch

Question

I use ELK stack to analyze my log file. I have tested last week and everything works well.
Today, I tested but I get this error when I typed "http://localhost:9200/iot_log/_count" (iot_log is my index pattern):
{"error":{"root_cause":[{"type":"index_not_found_exception","reason":"no
such
index","resource.type":"index_or_alias","resource.id":"iot_log","index_uuid":"na","index":"iot_log"}],"type":"index_not_found_exception","reason":"no such
index","resource.type":"index_or_alias","resource.id":"iot_log","index_uuid":"na","index":"iot_log"},"status":404}
I really searched the forums but I have not found a solution, I want to know what is the cause of this problem please and how can I correct it?

Answer 1

Make sure index iot_log exist and create it if not:
curl -X PUT "localhost:9200/iot_log" -H 'Content-Type: application/json' -d'{ "settings" : { "index" : { } }}'

Answer 2

You need to set your action.auto_create_index parameter in elasticsearch.yml file.
Example:
action.auto_create_index: -l*,+z*
With this kind of configuration, indexes starting with "z" will be created automatically while indexes starting with "l" will not.

Answer 3

The best way to resolve it by using setting as follow
Allow Auto Create YourIndexName and index10 and not allowing any index name matching index1* and any other index matching ind*. The patterns are matched in the order they are given.
curl -X PUT "localhost:9200/_cluster/settings?pretty" -H 'Content-Type: application/json' -d'{
"persistent": {
"action.auto_create_index": "YourIndexName,index10,-index1*,+ind*"
}
}'
Stop any Auto Indexing
curl -X PUT "localhost:9200/_cluster/settings?pretty" -H 'Content-Type: application/json' -d'{
"persistent": {
"action.auto_create_index": "false"
}
}'
Allow any Index create automatically
curl -X PUT "localhost:9200/_cluster/settings?pretty" -H 'Content-Type: application/json' -d'{
"persistent": {
"action.auto_create_index": "true"
}
}'
```

Answer 4

In my case, My all data is DELETED in elastic search automatically, After importing data again in elastic search my application working good.