No log produced when including <uuid/>

[dcerbino]

Describe the bug
everitiing work well unless I add uuid inside providers in LoggingEventCompositeJsonEncoder

To Reproduce
Steps to reproduce the behavior:

1. Use this
   logback-spring.xml.zip

2. uncomment uuid line 55

3. See unexpected output

20:40:23,722 |-INFO in ch.qos.logback.classic.joran.action.ContextNameAction - Setting logger context name as [D-C-P-T]
20:40:23,724 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
20:40:23,724 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [CONSOLE]
20:40:23,744 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.LoggingEventJsonProviders] for [providers] property
20:40:23,750 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.SequenceJsonProvider] for [sequence] property
20:40:23,751 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.LogstashVersionJsonProvider] for [version] property
20:40:23,751 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.ContextNameJsonProvider] for [contextName] property
20:40:23,763 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.LoggingEventFormattedTimestampJsonProvider] for [timestamp] property
20:40:23,765 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.LoggerNameJsonProvider] for [loggerName] property
20:40:23,766 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.LogLevelJsonProvider] for [logLevel] property
20:40:23,766 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.CallerDataJsonProvider] for [callerData] property
20:40:23,767 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.ThreadNameJsonProvider] for [threadName] property
20:40:23,767 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.MdcJsonProvider] for [mdc] property
20:40:23,768 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.ArgumentsJsonProvider] for [arguments] property
20:40:23,769 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.StackTraceJsonProvider] for [stackTrace] property
20:40:23,774 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.StackHashJsonProvider] for [stackHash] property
20:40:23,775 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [net.logstash.logback.composite.loggingevent.MessageJsonProvider] for [message] property
20:40:23,803 |-WARN in Logger[org.springframework.boot.diagnostics.FailureAnalyzers] - No appenders present in context [D-C-P-T] for logger [org.springframework.boot.diagnostics.FailureAnalyzers].

Expected behavior
Normal log in json format.

• what output did you expect
  "id": "(uuid)" on each event

Additional context
I'using Spring boot 2.4.0

• logstash-logback-encoder 6.5
• logback 1.2.3
• jackson 2.11.3
• java 11

[philsttr]

When I tried your configuration, the json output showed the uuid field correctly.

Ensure you have the following dependency on your classpath:

com.fasterxml.uuid:java-uuid-generator

If it still does not work for you, can you provide a simple application that reproduces the result (perhaps bootstrapped from start.spring.io)?

[dcerbino]

Thank @philsttr Now it works.
The question is why you do not declare it under your dependencies?

[philsttr]

Great!

It's an optional dependency since the only thing that needs it is the uuid provider, which is not used by many people. This keeps the logstash-logback-encoder dependency tree lean for users who do not use the uuid provider.

I updated the readme to mention the dependency.