# Using rollover got error
**URL:** https://discuss.elastic.co/t/using-rollover-got-error/84869
**Category:** Elasticsearch
**Created:** [May 8, 2017, 3:31am UTC](https://discuss.elastic.co/t/using-rollover-got-error/84869 "2017-05-08T03:31:05Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@flyfish](https://discuss.elastic.co/u/flyfish)
#### Post date: [May 8, 2017, 3:31am UTC](https://discuss.elastic.co/t/using-rollover-got-error/84869/1 "2017-05-08T03:31:05Z")
Hi,
I just created an alias which name is "squid-log-alias" for my index "squid-log", and when I setup rollover API and I got the error:
POST /squid-log-alias/\_rollover
{
"conditions":{
"max\_age": "7d",
"max\_docs": 1000
}
}
{
"error": {
"root\_cause": [
{
"type": "illegal\_argument\_exception",
"reason": "index name [squid-log] does not match pattern '^._-\d+$'"
}
],
"type": "illegal\_argument\_exception",
"reason": "index name [squid-log] does not match pattern '^._-\d+$'"
},
"status": 400
}
Do you know how?
---
### Author:  [@theuntergeek](https://discuss.elastic.co/u/theuntergeek)
#### Post date: [May 8, 2017, 4:09am UTC](https://discuss.elastic.co/t/using-rollover-got-error/84869/2 "2017-05-08T04:09:27Z")
The index behind the alias needs to end in an incrementable number. See [https://www.elastic.co/guide/en/elasticsearch/reference/5.4/indices-rollover-index.html](https://www.elastic.co/guide/en/elasticsearch/reference/5.4/indices-rollover-index.html)
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 5, 2017, 4:19am UTC](https://discuss.elastic.co/t/using-rollover-got-error/84869/3 "2017-06-05T04:19:02Z")
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