# Windows \_ logs are missing at the start of each hour

**URL:** <https://community.grafana.com/t/windows-logs-are-missing-at-the-start-of-each-hour/164178>\
**Category:** Grafana Alloy\
**Created:** [August 18, 2026, 5:04am UTC](https://community.grafana.com/t/windows-logs-are-missing-at-the-start-of-each-hour/164178 "2026-08-18T05:04:26Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![narayanak14](https://avatars.discourse-cdn.com/v4/letter/n/f4b2a3/32.png) [@narayanak14](https://community.grafana.com/u/narayanak14)\
**Post date:** [August 18, 2026, 5:04am UTC](https://community.grafana.com/t/windows-logs-are-missing-at-the-start-of-each-hour/164178/1 "2026-08-18T05:04:26Z")

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We have installed Grafana Alloy v1.14.0-rc.1 as a Windows service using alloy-installer-windows-amd64. We are experiencing an issue with hourly log rotation where logs generated at the start of each hour are missing.

We have tested multiple configurations, including different sync\_period values, as well as running without sync\_period. However, in all cases, logs at the beginning of each hourly rotation are being lost.

Has anyone encountered this issue before? Could you please help us identify the root cause and recommend a fix or workaround? Thank you.

**option1**  
local.file\_match “a\_log\_source” {  
path\_targets = [  
{“ **path** ” = "D:\temp\aa\*.log ]  
sync\_period = “1ms”  
}  
loki.source.file “a\_logs\_k” {  
targets = local.file\_match.a\_log\_source.targets  
tail\_from\_end = true  
forward\_to = [loki.process.a\_process.receiver]  
file\_watch {  
min\_poll\_frequency = “1ms”  
max\_poll\_frequency = “250ms”  
}  
}

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<div class="post-metadata">

**Author:** ![narayanak14](https://avatars.discourse-cdn.com/v4/letter/n/f4b2a3/32.png) [@narayanak14](https://community.grafana.com/u/narayanak14)\
**Post date:** [August 18, 2026, 5:46am UTC](https://community.grafana.com/t/windows-logs-are-missing-at-the-start-of-each-hour/164178/3 "2026-08-18T05:46:05Z")

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thank for info.But our case log rotation is happening every 1hr.

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**Author:** ![narayanak14](https://avatars.discourse-cdn.com/v4/letter/n/f4b2a3/32.png) [@narayanak14](https://community.grafana.com/u/narayanak14)\
**Post date:** [August 24, 2026, 8:48am UTC](https://community.grafana.com/t/windows-logs-are-missing-at-the-start-of-each-hour/164178/4 "2026-08-24T08:48:51Z")

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Hi All, more help if any one can to provide information on this

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**Author:** ![claytoncornell](https://avatars.discourse-cdn.com/v4/letter/c/87869e/32.png) [@claytoncornell](https://community.grafana.com/u/claytoncornell)\
**Post date:** [August 24, 2026, 3:01pm UTC](https://community.grafana.com/t/windows-logs-are-missing-at-the-start-of-each-hour/164178/5 "2026-08-24T15:01:52Z")

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It looks like you’ve bumped into this: [Alloy - not scraping logs after log rotation in Windows · Issue #2292 · grafana/alloy · GitHub](https://github.com/grafana/alloy/issues/2292) Comment on the issue to help it gain attention/traction.

A workaround… give each rotated file a unique name (example, add a timestamp in the filename) instead of rotating on a fixed filename. This forces local.file\_match to see a genuinely new path and start a fresh tailer.

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<div class="post-metadata">

**Author:** ![narayanak14](https://avatars.discourse-cdn.com/v4/letter/n/f4b2a3/32.png) [@narayanak14](https://community.grafana.com/u/narayanak14)\
**Post date:** [August 25, 2026, 2:24am UTC](https://community.grafana.com/t/windows-logs-are-missing-at-the-start-of-each-hour/164178/6 "2026-08-25T02:24:48Z")

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“ **path** ” = "D:\temp\aa\*.log " logs rotation is happening every hour and log files are storing uniq files only . format :D:\temp\aa\Log.YYYY-MM-DD.hh.log  
D:\temp\aa\Log.2026-08-25.12.log  
D:\temp\aa\Log.2026-08-25.11.log  
D:\temp\aa\Log.2026-08-25.10.log  
D:\temp\aa\Log.2026-08-25.09.log