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https://issues.apache.org/jira/browse/KAFKA-7237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rajini Sivaram updated KAFKA-7237:
----------------------------------
    Description: 
We currently use FATAL markers for fatal error messages in core. But only 
logback supports markers out-of-the-box and log4j simply logs these as ERROR 
messages, ignoring the marker. We should perhaps include a String marker within 
these messages to make it easier to identify fatal messages in logs.

>From https://www.slf4j.org/faq.html:

{quote}
While markers are part of the SLF4J API, only logback supports markers off the 
shelf. For example, if you add the {{%marker}}conversion word to its pattern, 
logback's {{PatternLayout}} will add marker data to its output. Marker data can 
be used to [filter messages|http://logback.qos.ch/manual/filters.html] or even 
[trigger|http://logback.qos.ch/manual/appenders.html#OnMarkerEvaluator] an 
outgoing email [at the end of an individual 
transaction|http://logback.qos.ch/recipes/emailPerTransaction.html].

In combination with logging frameworks such as log4j and java.util.logging 
which do not support markers, marker data will be silently ignored.
{quote}

  was:
We currently use FATAL markers for fatal error messages in core. But only 
logback supports markers out-of-the-box and log4j simply logs these as ERROR 
messages, ignoring the marker. We should perhaps include a String marker within 
these messages to make it easier to identify fatal messages in logs.

>From https://www.slf4j.org/faq.html:

 

While markers are part of the SLF4J API, only logback supports markers off the 
shelf. For example, if you add the {{%marker}}conversion word to its pattern, 
logback's {{PatternLayout}} will add marker data to its output. Marker data can 
be used to [filter messages|http://logback.qos.ch/manual/filters.html] or even 
[trigger|http://logback.qos.ch/manual/appenders.html#OnMarkerEvaluator] an 
outgoing email [at the end of an individual 
transaction|http://logback.qos.ch/recipes/emailPerTransaction.html].

In combination with logging frameworks such as log4j and java.util.logging 
which do not support markers, marker data will be silently ignored.


> Add explicit fatal marker to fatal error messages
> -------------------------------------------------
>
>                 Key: KAFKA-7237
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7237
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>            Reporter: Rajini Sivaram
>            Priority: Minor
>
> We currently use FATAL markers for fatal error messages in core. But only 
> logback supports markers out-of-the-box and log4j simply logs these as ERROR 
> messages, ignoring the marker. We should perhaps include a String marker 
> within these messages to make it easier to identify fatal messages in logs.
> From https://www.slf4j.org/faq.html:
> {quote}
> While markers are part of the SLF4J API, only logback supports markers off 
> the shelf. For example, if you add the {{%marker}}conversion word to its 
> pattern, logback's {{PatternLayout}} will add marker data to its output. 
> Marker data can be used to [filter 
> messages|http://logback.qos.ch/manual/filters.html] or even 
> [trigger|http://logback.qos.ch/manual/appenders.html#OnMarkerEvaluator] an 
> outgoing email [at the end of an individual 
> transaction|http://logback.qos.ch/recipes/emailPerTransaction.html].
> In combination with logging frameworks such as log4j and java.util.logging 
> which do not support markers, marker data will be silently ignored.
> {quote}



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