Hi, i have a problem with my stage.timestamp in grafana alloy, here is my configuration: local.file_match "tomcat_logs" { path_targets = [{ __address__ = "ibiatap01", __path__ = "/opt/tomcat_a/logs/webapps_blue/analytics/main.log", app = "analytics", environment = "blue", job …

I tested your logs and configuration, this worked for me: alloy process stage: stage.multiline { firstline = `^\[.+` } stage.regex { expression = `^\[(?P<tenant>[^\]]*)\]\**\W(?P<time>\d{4}-\d{2}-\d{2}\W\d{2}:\d{2}:\d{2},\d{3});\W(?P<thread>[^;]+);\W\[(?P<level>[^\]]+)\];\W(?P<compo…

You can use the backtick character ` to enclose your regex statement and avoid having to double escape special characters. This is the regex I have: expression = `^\[(?P<tenant>[^\]]*)\]\**\W(?P<time>\d{4}-\d{2}-\d{2}\W\d{2}:\d{2}:\d{2},\d{3});\W(?P<thread>[^;]+);\W\[(?P<level>[^\]]+)\];\W(?P<compo…

But the regex like i wrote was working fine, the problem is that don’t work the stage.timestamp that don’t work correctly

Yes but from the documentation of stage.timestamp: The stage.timestamp inner block configures a processing stage that sets the timestamp of log entries before they’re forwarded to the next component. When no timestamp stage is set, the log entry timestamp defaults to the time when the log entry was…

The timestamp on the left is the timestamp in Loki, and visualized to my local time (PST). The one on the right is the timestamp in the logs (part of the log). They are the same, if you take time zone into consideration.

Perfect it work, thank you for the explanation. I can asj to you if you can help me also in this grafana alerting task? [image] How to put an alert rule dependent to a dashboard variable? Grafana Hi, i have a variable in one of my Grafana’s dashboards and i have a row of …

Perfect it work, thank you very much for the explanation. I can ask to you if you can help me also in this grafana alerting task? [image] How to put an alert rule dependent to a dashboard variable? Grafana Hi, i have a variable in one of my Grafana’s dashboards and i have…

Probably best to start a separate thread

Grafana Alloy: stage.timestamp Fails to Parse Tomcat Logs with Millisecond Comma Format

Grafana Alloy

atabonidev April 8, 2025, 7:15am 10

Perfect it work, thank you very much for the explanation. I can ask to you if you can help me also in this grafana alerting task?

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Grafana Alloy: stage.timestamp Fails to Parse Tomcat Logs with Millisecond Comma Format

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