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https://issues.apache.org/jira/browse/LOG4J2-1071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15942130#comment-15942130
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Gary Gregory commented on LOG4J2-1071:
--------------------------------------
Patches welcome :-)
> Allow for bufferSize=0 in SMTP appender
> ---------------------------------------
>
> Key: LOG4J2-1071
> URL: https://issues.apache.org/jira/browse/LOG4J2-1071
> Project: Log4j 2
> Issue Type: Improvement
> Components: Appenders
> Affects Versions: 2.3
> Reporter: Benjamin Jaton
> Priority: Minor
>
> From the doc:
> "The number of logging events delivered in this e-mail depend on the value of
> BufferSize option. The SMTPAppender keeps only the last BufferSize logging
> events in its cyclic buffer. This keeps memory requirements at a reasonable
> level while still delivering useful application context. All events in the
> buffer are included in the email. The buffer will contain the most recent
> events of level TRACE to WARN preceding the event that triggered the email."
> https://logging.apache.org/log4j/2.x/manual/appenders.html#SMTPAppender
> The bufferSize is the number of messages preceding the message that triggered
> the event. They might be completely unrelated. One may not want to include
> them in the email at all, so having a bufferSize of 0 makes sense.
> This is however disallowed in the code:
> Caused by: java.lang.IllegalArgumentException: The maxSize argument (0) is
> not a positive integer.
> at
> org.apache.logging.log4j.core.util.CyclicBuffer.<init>(CyclicBuffer.java:41)
> at
> org.apache.logging.log4j.core.net.SmtpManager.<init>(SmtpManager.java:70)
> at
> org.apache.logging.log4j.core.net.SmtpManager$SMTPManagerFactory.createManager(SmtpManager.java:338)
> at
> org.apache.logging.log4j.core.net.SmtpManager$SMTPManagerFactory.createManager(SmtpManager.java:299)
> at
> org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:71)
> at
> org.apache.logging.log4j.core.net.SmtpManager.getSMTPManager(SmtpManager.java:124)
> at
> org.apache.logging.log4j.core.appender.SmtpAppender.createAppender(SmtpAppender.java:142)
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