So is everyone happy with the way that errors are currently reported? If not, now (or right after this is committed), is the time to change that. /solr/select/qt="myhandler" should be backward compatible, but /solr/myhandler doesn't need to be. Same for the update stuff.
In SOLR-104, all exceptions are passed to the client as HTTP Status codes with the message. If you write: throw new SolrException( 400, "missing parameter: "+p ); This will return 400 with a message "missing parameter: " + p. Exceptions or SolrExceptions with code=500 || code<100 are sent to client with status code 500 and a full stack trace.
