diff options
Diffstat (limited to 'synapse/metrics/_legacy_exposition.py')
| -rw-r--r-- | synapse/metrics/_legacy_exposition.py | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/synapse/metrics/_legacy_exposition.py b/synapse/metrics/_legacy_exposition.py index 563d8cc2c6..1459f9d224 100644 --- a/synapse/metrics/_legacy_exposition.py +++ b/synapse/metrics/_legacy_exposition.py @@ -20,7 +20,7 @@ Due to the renaming of metrics in prometheus_client 0.4.0, this customised vendoring of the code will emit both the old versions that Synapse dashboards expect, and the newer "best practice" version of the up-to-date official client. """ - +import logging import math import threading from http.server import BaseHTTPRequestHandler, HTTPServer @@ -34,6 +34,7 @@ from prometheus_client.core import Sample from twisted.web.resource import Resource from twisted.web.server import Request +logger = logging.getLogger(__name__) CONTENT_TYPE_LATEST = "text/plain; version=0.0.4; charset=utf-8" @@ -219,11 +220,16 @@ class MetricsHandler(BaseHTTPRequestHandler): except Exception: self.send_error(500, "error generating metric output") raise - self.send_response(200) - self.send_header("Content-Type", CONTENT_TYPE_LATEST) - self.send_header("Content-Length", str(len(output))) - self.end_headers() - self.wfile.write(output) + try: + self.send_response(200) + self.send_header("Content-Type", CONTENT_TYPE_LATEST) + self.send_header("Content-Length", str(len(output))) + self.end_headers() + self.wfile.write(output) + except BrokenPipeError as e: + logger.warning( + "BrokenPipeError when serving metrics (%s). Did Prometheus restart?", e + ) def log_message(self, format: str, *args: Any) -> None: """Log nothing.""" |