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https://issues.apache.org/jira/browse/FELIX-388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12532021
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Karl Pauls commented on FELIX-388:
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Sounds good. I'm going to apply the patch. Thanks.
> Startup delay due to ExtensionManager
> -------------------------------------
>
> Key: FELIX-388
> URL: https://issues.apache.org/jira/browse/FELIX-388
> Project: Felix
> Issue Type: Improvement
> Components: Framework
> Reporter: Felix Meschberger
> Assignee: Karl Pauls
>
> The ExtensionManager creates its own URL using itself as the
> URLStreamHandler. The URL is inserted into the URL ClassLoader launching the
> framework. If a resource is to be found using this URL, the equals method is
> called which causes the host name of the URL (extension) to be resolved by
> InetAddress.getByName(name).
> As the host is not in any DNS (most probably) and the name does not matter
> anyway, resolution of the host name seems to be overkill and just delay
> operation. To prevent this lookup, I propose to overwrite the
> URLStreamHandler.getHostAddress(URL) in the ExtensionManager to just
> immediately return null:
> Index:
> /usr/src/felix/trunk/framework/src/main/java/org/apache/felix/framework/ExtensionManager.java
> ===================================================================
> ---
> /usr/src/felix/trunk/framework/src/main/java/org/apache/felix/framework/ExtensionManager.java
> (revision 581194)
> +++
> /usr/src/felix/trunk/framework/src/main/java/org/apache/felix/framework/ExtensionManager.java
> (working copy)
> @@ -20,6 +20,7 @@
>
> import java.io.IOException;
> import java.io.InputStream;
> +import java.net.InetAddress;
> import java.net.URL;
> import java.net.URLConnection;
> import java.net.URLStreamHandler;
> @@ -566,4 +567,10 @@
> m_extensions.add(extension);
> }
> }
> +
> + protected InetAddress getHostAddress( URL u )
> + {
> + // the extension URLs do not address real hosts
> + return null;
> + }
> }
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