java - Log4j2 smtp appender doesn't work for root logger -

i'm using log4j2.2 in app. i'd receive email when there error in application.

so configured smtp appender:

<smtp name="mailer" subject="ecall logs" to="${receipients}"         from="${from}" smtphost="${smtphost}" smtpport="${smtpport}"         smtpprotocol="${smtpprotocol}" smtpusername="${smtpuser}"         smtppassword="${smtppassword}" smtpdebug="true" buffersize="200"         ignoreexceptions="false"> </smtp> 

and added root logger:

<root level="error">     <appender-ref ref="console" />     <appender-ref ref="asyncfile" />     <appender-ref ref="mailer" /> </root>      

unfortunately configuration never receive email when there errors in app. in fact i've others custom loggers:

<logger level="info" name="org.flywaydb" additivity="false">     <appender-ref ref="console" />     <appender-ref ref="asyncfile" /> </logger> 

which right way configure smtp logger whole application (catch errors packages) 100 lines of buffers in order see happened before/after error?

you may have found bug. smtp appender should send email when receives error-level log event. try include "buffersize" events (from trace warn) preceded error.

i don't think smpt appender requires preceding non-error events, can try this:

<root level="trace">   <appender-ref ref="console" level="error"/>   <appender-ref ref="asyncfile" level="error"/>   <appender-ref ref="mailer" level="trace"/> </root>  

if problem persists please raise ticket on log4j2 jira issue tracker.