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Fix journalctl buffering causing incomplete log transmission #2

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Merged
thomas-hiddenpeak merged 2 commits into from
Jan 14, 2026
Merged

Fix journalctl buffering causing incomplete log transmission #2

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9794fb1
Fix journalctl buffering causing incomplete log transmission
massif-01 Jan 13, 2026
bf0b01c
Merge pull request #1 from massif-01/fix/journalctl-line-buffering
massif-01 Jan 14, 2026
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4 changes: 3 additions & 1 deletion src/tegrastats_api/model_monitor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -184,7 +184,9 @@ def _monitor_logs(self) -> None:
# Get more historical lines to ensure we capture startup logs
# LLM startup can be verbose, so we need more lines
history_lines = 300 if self.model_type == "llm" else 200
cmd = ["journalctl", "-u", self.service_name, "-f", "-n", str(history_lines)]
# Use stdbuf to force line-buffered output from journalctl
# This prevents log lines from getting stuck in journalctl's buffer
cmd = ["stdbuf", "-oL", "journalctl", "-u", self.service_name, "-f", "-n", str(history_lines)]
self._process = subprocess.Popen(
cmd,
stdout=subprocess.PIPE,
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