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From Brett Porter <>
Subject more thoughts on proxy logging
Date Sun, 11 Nov 2007 14:52:08 GMT

I've been trying to figure out how best to address proper diagnostic  
info in proxy logging after finding myself confused when it failed  
recently. I think this can hold until 1.1, but I started a JIRA for  
tracking (MRM-588) and hoped we could discuss it here.

Here is the summary:

I would like to open discussion for what exactly needs to be logged,  
and at what level, for proxy issues to be effectively diagnosed. With  
the current configuration, I was unable to pinpoint some problems  

Some thoughts:

     * don't talk about policies, but state what is happening
     * always include the artifact and repository requested
     * log more if it results in a NotFoundException
     * condense information onto fewer lines where possible (if there  
are concurrent requests, without an NDC these will start getting  
mixed up in the logs)

Here are my thoughts:

DEBUG Artifact [x/y/z.jar] will not be requested from remote  
repository [foo] as it didn't match whitelist items
DEBUG Artifact [x/y/z.jar] will not be requested from remote  
repository [foo] as it matched blacklist item x/**
INFO Artifact [x/y/z.jar] requested from managed repository  
[internal], checking remote repositories [central,],  
excluding remote repositories [foo]

INFO Artifact [x/y/z.jar] retrieved from remote repository [central],  
skipping others
INFO Artifact [x/y/z.jar] not retrieved as it failed post-download  
policy [bar-policy] (include reason)

And so on...


An open question is what level to log this at: I feel that it should  
be at INFO, but that might be too noisy by default. Perhaps the right  
thing to do here is to add a connector configuration property that  
says whether to log all requests (and if not, only log at debug level).


Brett Porter -

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