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From "Hoss Man (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3734) Forever loop in schema browser
Date Thu, 06 Sep 2012 00:27:07 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449303#comment-13449303
] 

Hoss Man commented on SOLR-3734:
--------------------------------

watching the logs while using the UI, it seems that the crux of the info all comes from these
two urls...

{noformat}
INFO: [collection1] webapp=/solr path=/admin/luke params={numTerms=0&wt=json} status=0
QTime=10 
Sep 5, 2012 4:51:45 PM org.apache.solr.core.SolrCore execute
INFO: [collection1] webapp=/solr path=/admin/luke params={wt=json&show=schema} status=0
QTime=3 
{noformat}

Ignoring for a moment that it seems absurd to me that the strings in the "copyDests" and "copySources"
arrays are the "toString" of the SchemaField/CopyField objects, instead of just the field
names: i *think* the data in the response is correct.

It seems, if i'm understanding correctly, that the root problem is that the UI expects all
copySources returned by show=schema to be real field names that were already by the previous
numTerms=0 request - but this is not guaranteed, nor is it abnormal to have these copyFields
based on dynamicFields.

And if i'm understanding correctly, all the UI is doing with this information is populating
"Copied from" and "Copied to" lists, which then link to "/schema-browser?field=foo" (and maybe
"/schema-browser?dynamic-field=foo_*" - but i didn't actually see any examples of that) to
see details about those fields.  But the "/schema-browser?field=foo" URLs only seem to work
if that field actaully exists in the luke?numTerms=0 response -- even if they are legal because
of dynamicField.

So, for example, this address_s URL doesn't work in the UI  using the example configs on trunk
if you have no data indexed, but once you index the sample data it does start to work...

http://localhost:8983/solr/#/collection1/schema-browser?field=address_s

I think the "correct" fixes would be...

* the UI should not freak out if a copySources or copyDest refers to a field or dynamic field
pattern it doesn't know about.  it should list it in the display as usual and provide the
appropriate ?field=foo or ?field=foo_* link (depending on wether the copySource contains a
wildcard.
* if someone clicks on one of those links, and there is no field data available about a field
(because it isn't explicitly declared, nor does it exist in the index, so it's not returned
by the luke?numTerms=0 request) then the UI should display a simple warning "Field not found
in index, no details available" or something like that.  

We can probably look into improving that second case in the future (so even if it's not in
the index, and wasn't returned by the luke?numTerms-0 request, the UI should be able to ask
luke for info about a field by name, and have luke response back with "not currently in the
index, but it is a legal field name because of dynamicField foo_*, and heres' the fieldType
and field flags")





                
> Forever loop in schema browser
> ------------------------------
>
>                 Key: SOLR-3734
>                 URL: https://issues.apache.org/jira/browse/SOLR-3734
>             Project: Solr
>          Issue Type: Bug
>          Components: Schema and Analysis, web gui
>            Reporter: Lance Norskog
>         Attachments: SOLR-3734.patch, SOLR-3734_schema_browser_blocks_solr_conf_dir.zip
>
>
> When I start Solr with the attached conf directory, and hit the Schema Browser, the loading
circle spins permanently. 
> I don't know if the problem is in the UI or in Solr. The UI does not display the Ajax
solr calls, and I don't have a debugging proxy.

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