RFC: bump aws-embedded-metrics from 1.0.6 to 4.0.1

[kozub]

Key information

• RFC PR: (leave this empty)
• Related issue(s), if known: build(deps): bump aws-embedded-metrics from 1.0.6 to 4.0.1 #943
• Area: (i.e. Tracer, Metrics, Logger, etc.) Metric
• Meet tenets: (Yes/no)

Summary

There are some work required to bump aws-embedded-metrics to 4.0.1

Motivation

I had a quick look on the issue that appeared when dependabot bumped aws-embedded-metrics to 4.0.1.

I looks that in latest version some components of aws-embedded-metrics throw checked exceptions which are not handled in the app. I will create a PR showing the issue and fix.

[n8m8]

Work on this would be much appreciated, I'm running into these excessive socket error logs upon using MetricsUtils.withSingleMetric when running unit tests, which I've been suggested can be reduced by bumping aws-embedded-metrics to > 2.x.

ERROR TCPClient:43 - Failed to connect to the socket due to the exception: 
java.net.SocketException: Socket closed
    at java.net.PlainSocketImpl.socketConnect(Native Method) ~[?:1.8.0_332]
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[?:1.8.0_332]
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[?:1.8.0_332]
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[?:1.8.0_332]
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[?:1.8.0_332]
    at java.net.Socket.connect(Socket.java:607) ~[?:1.8.0_332]
    at java.net.Socket.connect(Socket.java:556) ~[?:1.8.0_332]
    at software.amazon.cloudwatchlogs.emf.sinks.TCPClient.connect(TCPClient.java:40) ~[aws-embedded-metrics-1.0.6.jar:1.0.6]
    at software.amazon.cloudwatchlogs.emf.sinks.TCPClient.sendMessage(TCPClient.java:63) ~[aws-embedded-metrics-1.0.6.jar:1.0.6]
    at software.amazon.cloudwatchlogs.emf.sinks.AgentSink.accept(AgentSink.java:52) ~[aws-embedded-metrics-1.0.6.jar:1.0.6]
    at software.amazon.cloudwatchlogs.emf.logger.MetricsLogger.flush(MetricsLogger.java:66) ~[aws-embedded-metrics-1.0.6.jar:1.0.6]
    at software.amazon.lambda.powertools.metrics.MetricsUtils.withSingleMetric(MetricsUtils.java:120) ~[powertools-metrics-1.12.2.jar:?]

[markkuhn]

I would recommend using v4.0.3 instead as there is a known bug in v4.0.1 which affects most users.

[jeromevdl]

This introduces breaking changes:
A simple metricsLogger.putMetric(...) now throws checked exception (InvalidMetricException).

This should be released in a v2 of lambda-powertools-metrics.

[msailes]

I'm going to close this issue because we have a much clearer issue and reason why we want to upgrade now. #1041 requires v4.x and gives an additional feature we want to support.