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From Ryan McKinley <>
Subject Re: Returning errors from request handler
Date Thu, 26 Jul 2007 23:25:22 GMT
> Nice, valid xml. But If I have an error (for example, <commit></comit>) I
> get an HTML page back.

In 1.2, if you map /update to the XmlUpdateHandler in solrconfig.xml, 
errors are returned with an HTTP status error (ie, something != 200) + 
message.  Your servlet runner (Jetty, Tomcat, etc) will format this as HTML.

> This tends to confuse the client software. 

Depends how the client is written ;)

The other option is to check the HTTP status on response.  It is nice to 
get a 400 when the input is wrong, a 401 if you are unauthorized to do 
something, a 500 is something went wrong on the server.

> Is there a way to get a return like:
> <?xml version="1.0" encoding="UTF-8"?>
> <response>
> <lst name="responseHeader"><int name="status">1</int><exception>blah,
> blah</exeption><int name="QTime">0</int></lst>
> </response>

Yes, you can go back to solr 1.1 style response by removing the mapping 
for /update in solrconfig.xml

Check the last paragraph in "Upgrading from Solr 1.1"

> I've actually written my own handler, but since XmlUpdateHandler does the
> same thing, I thought it would make a simple example.

Hymm, for your own handler... you could catch your own exceptions and 
put them in the response.  It was a design decision to only have 
response code 200 for valid responses and something != 200 for error cases.


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