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https://issues.apache.org/jira/browse/LOG4J2-1192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15038013#comment-15038013
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Thies Wellpott edited comment on LOG4J2-1192 at 12/3/15 4:17 PM:
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Hi!
I created a new Appender (ExtendedSmtpAppender) which optionally allows to use
PatternLayout for the subject.
Additionally, it supports burst summarizing, so you will not get 1000 error
emails wihtin a few seconds or minutes. Use case: Send all ERROR-logs via Email
to support/developer. On a broken network or database this can cause hundreds
of the same error email.
This appender does the following:
- the first occurrence is email immediatly
- all following similar ERROR logs are buffered for a certain time (similarity
and time is configurable)
- after the time passed, a summary email with summary info (number of events,
time) and the first and last event is send
See two attached source codes (the may be moved into the
org.apache.logging.log4j.core package and included into the log4j2 project).
Example configuration (inside <Appenders>):
{code:xml}
<SMTPx name="ErrorMail" smtpHost="mailer02.xxxx.de" smtpPort="25"
from="your name <[email protected]>"
to="${errorEmailAddresses}"
subject="[PROJECT-ID, ${hostName}, ${web:contextPath}] %p:
%c{1} - %m%notEmpty{ =>%ex{short})}"
subjectWithLayout="true" bufferSize="5"
burstSummarizingSeconds="300" bsCountInSubject="S"
bsMessageMaskDigits="true"
bsExceptionOrigin="true" >
<PatternLayout pattern="-- %d %p %c [%.20t,%x] %m%n" charset="UTF-8"
/> <!-- SMTP uses fixed charset for message -->
</SMTPx>
<Async name="AsyncErrorMail" blocking="false" errorRef="Console">
<AppenderRef ref="ErrorMail"/>
</Async>
{code}
was (Author: [email protected]):
Hi!
I created a new Appender (ExtendedSmtpAppender) which optionally allows to use
PatternLayout for the subject.
Additionally, it supports burst summarizing, so you will not get 1000 error
emails wihtin a few seconds or minutes. Use case: Send all ERROR-logs via Email
to support/developer. On a broken network or database this can cause hundreds
of the same error email.
This appender does the following:
- the first occurrence is email immediatly
- all following similar ERROR logs are buffered for a certain time (similarity
and time is configurable)
- after the time passed, a summary email with summary info (number of events,
time) and the first and last event is send
See two attached source codes (the may be moved into the
org.apache.logging.log4j.core package and included into the log4j2 project).
Example configuration (inside <Appenders>):
{code:xml}
<SMTPx name="ErrorMail" smtpHost="mailer02.xxxx.de"
smtpPort="25"
from="your name <[email protected]>"
to="${errorEmailAddresses}"
subject="[PROJECT-ID, ${hostName},
${web:contextPath}] %p: %c{1} - %m%notEmpty{ =>%ex{short})}"
subjectWithLayout="true" bufferSize="5"
burstSummarizingSeconds="300"
bsCountInSubject="S" bsMessageMaskDigits="true"
bsExceptionOrigin="true" >
<PatternLayout pattern="-- %d %p %c [%.20t,%x] %m%n"
charset="UTF-8" /> <!-- SMTP uses fixed charset for message -->
</SMTPx>
<Async name="AsyncErrorMail" blocking="false"
errorRef="Console">
<AppenderRef ref="ErrorMail"/>
</Async>
{code}
> Dynamic Subject for SMTP Appender
> ---------------------------------
>
> Key: LOG4J2-1192
> URL: https://issues.apache.org/jira/browse/LOG4J2-1192
> Project: Log4j 2
> Issue Type: New Feature
> Components: Appenders
> Affects Versions: 2.4.1
> Environment: ALL
> Reporter: Jörg Bretschneider
> Labels: features
>
> It is annoying to have log messages sent to users via SMTP Appender with a
> static subject, requiring recipients to open each of possibly a vast amount
> of log emails in order to find out what went wrong.
> Users should be able to insert runtime diagnostic context information to the
> message text AND to the message subject as well.
> While the first seems to be working with Patternlayout using the mechanism
> with the %X{<key>} pattern based on a NDC or MDC <key> in the
> "ConversionPattern" parameter, it does NOT work with the "Subject" parameter
> with log4j (neither 1.2 nor 2.x), though some bloggers suggest it, e.g.
> http://stackoverflow.com/a/7015453.
> See
> http://stackoverflow.com/questions/29435825/log4j2-custom-email-subject-from-map
> as an example where others found this also.
> This issue should have been fixed long ago.
> I suggest to extend SMTP appender in order to be able to use %X and other
> Pattern conversion in the "Subject" parameter properly.
> http://openutils.sourceforge.net/openutils-log4j/smtpappender.html
> has already done the part for applying PatternLayout to the SMTP Appender
> "Subject". I didn't test if this works properly.
> Maybe this work can be included into log4j with minimal effort?
> This feature has originally been realized in LOGBACK using an MDC in
> Patternlayouts: http://logback.qos.ch/manual/mdc.html
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