CRE-2025-0090
Loki Log Line Exceeds Max Size LimitLow
Description
Alloy detects the Loki is dropping log lines because they exceed the configured maximum line size. This typically indicates that applications are emitting extremely long log entries, which Loki is configured to reject by default.
Mitigation
To resolve this issue, you can adjust Loki's runtime configuration to either: 1. **Increase `max_line_size`**: Allow Loki to accept larger log lines. Be cautious when increasing this significantly, as it can impact Loki's performance and memory consumption. 2. **Enable `max_line_size_truncate`**: Configure Loki to automatically truncate log lines that exceed the limit instead of dropping them entirely. This preserves the beginning of the log message. You can apply these changes via Loki's runtime configuration overrides, typically in a YAML file like this: ``` --- overrides: limits_config: max_line_size: 10485760 # Set to 10MB (10 * 1024 * 1024 bytes) max_line_size_truncate: true ``` Ensure that your Loki deployment is configured to load this runtime override file.