[Beta] - "ApplicationInsights:Invalid attribute value set for key: req []"

[marcus13371337]

Hello,

I just bumped to 3.0.0-beta.6 (from 3.0.0-beta.4) and started noticing a lot of errors in my application:

ApplicationInsights:Invalid attribute value set for key: req []
ApplicationInsights:Invalid attribute value set for key: res []

What's up with that? Am I doing something wrong?

[hectorhdzg]

@marcus13371337 can you share the actual telemetry event that is triggering this?, I can see there is some OpenTelemetry that add the warning when the value of the attribute is null, you may want to sanitize the attributes before sending the telemetry

[marcus13371337]

@hectorhdzg I can't reproduce it locally unfortunately. However, it seems as if objects and errors are sent with toString instead of JSON-serialized (which worked in the earlier version).

I think it's an error on our side, we have a logging to trace converter which was implemented this way:

  const getLogProperties = (entry: LogEntry) => {
    // eslint-disable-next-line @typescript-eslint/no-unused-vars
    const { msg, ...rest } = entry;

    return {
      ...rest,
    };
  };

  const insertTrace = (entry: LogEntry) => {
    const inserts: Promise<void>[] = [];

    inserts.push(
      logHandler.trackTrace({
        message: entry.msg,
        severity: getLogSeverityName(entry.level),
        properties: getLogProperties(entry),
      })
    );

    if (entry.level >= 50) {
      const err = new Error(entry.msg);
      err.stack = entry.stack || "";

      inserts.push(
        logHandler.trackException({
          exception: err,
          properties: getLogProperties(entry),
        })
      );
    }

    return Promise.all(inserts);
  };

We had to fix that with the following change:

  const getLogProperties = (entry: LogEntry) => {
    const { msg, ...rest } = entry;

    return Object.entries(rest).reduce(
      (acc, [key, value]) => ({ ...acc, [key]: JSON.stringify(value) }), // Apperently you need to JSON-stringify in the new version
      {}
    );
  };

  const insertTrace = (entry: LogEntry) => {
    const inserts: Promise<void>[] = [];

    inserts.push(
      logHandler.trackTrace({
        message: entry.msg,
        severity: getLogSeverityName(entry.level),
        properties: getLogProperties(entry),
      })
    );

    if (entry.level >= 50) {
      const err = new Error(entry.msg);
      err.stack = entry.stack || "";

      inserts.push(
        logHandler.trackException({
          exception: err,
          properties: getLogProperties(entry),
        })
      );
    }

    return Promise.all(inserts);
  };

Note the difference in getLogProperties. I'm not sure if it's a bug or a feature :)

[marcus13371337]

The fix above fixed the issue reported in the logs i.e "ApplicationInsights:Invalid attribute value set for key: req"