Filemonitor add truncation support#226
Open
erikjchen wants to merge 4 commits into
Open
Conversation
Author
|
@microsoft-github-policy-service agree company="Computronix" |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Context & Problem
Currently, LogMonitor tracks file growth using NextReadOffset. However, many containerized logging tools and workloads rotate log files by truncating them in-place (reducing their size to 0) rather than creating a new file. When this happens, NextReadOffset remains at its previous high value, causing LogMonitor to miss new log lines until the truncated file grows past its old size.
Solution
This PR introduces a new opt-in configuration flag, enableTruncationRecovery (default: false). When enabled, LogMonitor detects if a file has been truncated in-place and safely resets the read offset to 0 to capture the new log lines immediately.