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fix(logging): ensure callback executes even if Application Insights throws #791

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fix(logging): ensure callback executes even if Application Insights throws #791

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32 changes: 17 additions & 15 deletions providers/logging/logger.js
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Original file line number Diff line number Diff line change
Expand Up @@ -39,28 +39,30 @@ class ApplicationInsightsTransport extends Transport {
return
}

const properties = buildProperties(info)
if (info.level === 'error') {
if (info.stack) {
const err = new Error(info.message)
err.stack = info.stack
this.aiClient.trackException({ exception: err, properties })
try {
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@JamieMagee JamieMagee May 27, 2026

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No catch here, so a throw from the AI client still escapes through Winston into the caller. The callback fires, but the calling code crashes. Catch it and drop the telemetry quietly (or console.error it). Losing a log line beats killing the request that produced it.

const properties = buildProperties(info)
if (info.level === 'error') {
if (info.stack) {
const err = new Error(info.message)
err.stack = info.stack
this.aiClient.trackException({ exception: err, properties })
} else {
this.aiClient.trackTrace({
message: info.message,
severity: appInsights.KnownSeverityLevel.Error,
properties
})
}
} else {
this.aiClient.trackTrace({
message: info.message,
severity: appInsights.KnownSeverityLevel.Error,
severity: mapLevel(info.level),
properties
})
}
} else {
this.aiClient.trackTrace({
message: info.message,
severity: mapLevel(info.level),
properties
})
} finally {
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@JamieMagee JamieMagee May 27, 2026

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Needs a catch paired with this. Without one the exception still propagates after callback() runs, so we get the callback guarantee but lose the safety.

callback()
}

callback()
}
}

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