rmoff/logstash-1.5-node.md

## logstash-1.5-node.md

      
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              logstash-1.5-node.md
            
          
    Running an existing conf file from logstash 1.4.2 with logstash-1.5.0.beta1 fails with :
The error reported is:
  pattern %{WLSLOG} not defined

This seems to be because the grok plugin no longer defaults patterns_dir to ./patterns
Fix is to change all uses of grok in conf file to include patterns_dir:
grok {
	match => ["file", "%{WLSSERVER}", "file","%{OBISERVER}"]
}

becomes
grok {
	match => ["file", "%{WLSSERVER}", "file","%{OBISERVER}"]
	patterns_dir => "./patterns"
}