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From Felix Gnass <>
Subject Tomcat sends status code 400 during re-deployment
Date Wed, 13 Dec 2006 18:55:21 GMT

this is a follow-up to my yesterday's post (Displaying a maintenance 
page during re-deployments via manager app).

In order to work around the problem I decided to use Ant's scp and 
sshexec tasks instead of the Manager application.

I use the autoDeploy="true" feature so that I can simply replace the 
ROOT.war file in appBase. Everything works fine so far: Tomcat detects 
that the WAR has been modified, undeploys the old application, deletes 
the old unpacked directory and extracts the new WAR file to appBase/ROOT.

But unfortunately the same thing happens as described yesterday: During 
the re-deployment Tomcat sends "400 / Bad Request" responses (No host 
matches ...). Which again means that Apache can't serve a custom error 
document (see my previous post).

I hope this is due to some misconfiguration since otherwise it renders 
the hot-deployment feature useless for me, at least in production 

Currently the only work-around is to shutdown Tomcat (as in this case 
Apache serves the 503 error document), delete the appBase/ROOT 
directory, replace the WAR and restart Tomcat. This is okay for me and 
possibly the better solution anyway, since this way I can be sure not to 
run into any classloader-related garbage collection issues.

However, I think this might be considered as a Tomcat bug, since 
according to the HTTP RFC 400 is not really an appropriate status code 
here. I'd be glad if one of the Tomcat developers could give his opinion 

I'm using Tomcat 5.5.20 with the following server.xml:

<Server port="8005">
  <Service name="Catalina">
    <Connector port="8009" protocol="AJP/1.3" 
useBodyEncodingForURI="true" />
    <Logger className="org.apache.catalina.logger.SystemOutLogger" />
    <Engine name="Catalina" defaultHost="localhost">
      <Realm className="org.apache.catalina.realm.MemoryRealm" />
      <Host name="localhost" appBase="webapps" autoDeploy="true" 

Best regards,

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