From 9b82d1d37d913fad0d2f230963554ab206629ba2 Mon Sep 17 00:00:00 2001
From: Richard Hansen <rhansen@rhansen.org>
Date: Wed, 10 Mar 2021 05:12:14 -0500
Subject: [PATCH] server: Log stats (metrics) on fatal error

This might help users troubleshoot rare crashes.
---
 src/node/server.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/node/server.js b/src/node/server.js
index fc62b4471..a574116eb 100755
--- a/src/node/server.js
+++ b/src/node/server.js
@@ -46,6 +46,7 @@ const hooks = require('../static/js/pluginfw/hooks');
 const pluginDefs = require('../static/js/pluginfw/plugin_defs');
 const plugins = require('../static/js/pluginfw/plugins');
 const settings = require('./utils/Settings');
+const stats = require('./stats');
 
 const logger = log4js.getLogger('server');
 
@@ -104,8 +105,6 @@ exports.start = async () => {
     // Check if Etherpad version is up-to-date
     UpdateCheck.check();
 
-    // start up stats counting system
-    const stats = require('./stats');
     stats.gauge('memoryUsage', () => process.memoryUsage().rss);
     stats.gauge('memoryUsageHeap', () => process.memoryUsage().heapUsed);
 
@@ -215,6 +214,7 @@ exports.exit = async (err = null) => {
     logger.info('Received SIGTERM signal');
     err = null;
   } else if (err != null) {
+    logger.error(`Metrics at time of fatal error:\n${JSON.stringify(stats.toJSON(), null, 2)}`);
     logger.error(err.stack || err.toString());
     process.exitCode = 1;
     if (exitCalled) {