Issue Type: Bug Bug
Affects Versions: 1.0.13
Assignee: Logback dev list
Components: logback-core
Created: 20/Mar/14 6:30 PM
Description:

Configuring a SyslogAppender with a bad hostname or IP address will result in the appender's SyslogOutputStream (sos) being null. If this appender's stop() method is called (which could be triggered from a reset() call in the context) an NPE is thrown because the stop method in SyslogAppenderBase does not check whether sos is null before attempting to call its close() method.
Environment:

Java 7 (java-1.7.0-openjdk-1.7.0.45.x86_64)
CentOS 6.3
Project: logback
Priority: Major Major
Reporter: Pat Lynch
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