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http://jira.qos.ch/browse/LBCORE-228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12223#action_12223
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Ralph Goers commented on LBCORE-228:
------------------------------------

http://tools.ietf.org/html/rfc3164 says the maximum length of a syslog message 
is 1024 bytes. To be compliant the appender should be truncating messages to 
that length. Consider yourself lucky if anything over that length works.

> Syslog messages over 64K are discarded
> --------------------------------------
>
>                 Key: LBCORE-228
>                 URL: http://jira.qos.ch/browse/LBCORE-228
>             Project: logback-core
>          Issue Type: Bug
>          Components: Appender
>    Affects Versions: 0.9.30
>            Reporter: Pasi Eronen
>            Assignee: Logback dev list
>
> SyslogAppenderBase truncates very long messages to 256k, which is not very 
> useful limit, since SyslogOutputStream supports only UDP, which has maximum 
> message size of 64k. Messages over 64k result in "java.io.IOException: 
> Message too long" (from DatagramSocket.send, called from 
> SyslogOutputStream.flush), but this exception is visible only in logger 
> context status...
> Proposed fix: truncate long messages instead of discarding them. More 
> specifically, change MSG_SIZE_LIMIT in SyslogAppenderBase to 65000.

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