This project exists as a proof of a Logstash encoder bug which causes it to ignore unknown types, silently ignoring logs.
See: logfellow/logstash-logback-encoder#1007
You need a Java 17 JDK installed and on the PATH.
$ ./mvnw clean compile assembly:single
...
$ java -jar ./target/logstash-encoder-addkeyvalue-ignoring-objects-bug-1.0-SNAPSHOT-jar-with-dependencies.jar
{"@timestamp":"2024-02-12T15:29:49.027406+01:00","@version":"1","message":"Just to show stuff is logged at all","logger_name":"com.spotify.logstashbug.Main","thread_name":"main","level":"ERROR","level_value":40000,"some-context":"hello: \"world\"\nworld: 123\n"}This has been tested on macOS and in Linux x64 production environments.
The output you should get from running the app is:
{"@timestamp":"2024-02-12T15:29:49.027406+01:00","@version":"1","message":"Just to show stuff is logged at all","logger_name":"com.spotify.logstashbug.Main","thread_name":"main","level":"ERROR","level_value":40000,"some-context":"hello: \"world\"\nworld: 123\n"}
There should however be 2 logs, as per the Main class.
Note that this code is not owned by the author, but rather Spotify AB. This project is licensed under the MIT Licence. See the licence text here.
Ownership details:
Spotify AB
Regeringsgatan 19
111 53 Stockholm
Sweden