Re: Solr 4.3: Recovering from "Too many values for UnInvertedField faceting on field"

[Greg Preston <gp...@marinsoftware.com>]

Our index is too large to uninvert on the fly, so we've been looking
into using DocValues to keep a particular field uninverted at index
time.  See http://wiki.apache.org/solr/DocValues

I don't know if this will solve your problem, but it might be worth
trying it out.

-Greg


On Tue, Sep 3, 2013 at 7:04 AM, Dennis Schafroth <de...@indexdata.com> wrote:
> We are harvesting and indexing bibliographic data, thus having many distinct author names in our index. While testing Solr 4 I believe I had pushed a single core to 100 million records (91GB of data) and everything was working fine and fast. After adding a little more to the index, then following started to happen:
>
> 17328668 [searcherExecutor-4-thread-1] WARN org.apache.solr.core.SolrCore – Approaching too many values for UnInvertedField faceting on field 'author_exact' : bucket size=16726546
> 17328701 [searcherExecutor-4-thread-1] INFO org.apache.solr.core.SolrCore – UnInverted multi-valued field {field=author_exact,memSize=336715415,tindexSize=5001903,time=31595,phase1=31465,nTerms=12048027,bigTerms=0,termInstances=57751332,uses=0}
> 18103757 [searcherExecutor-4-thread-1] ERROR org.apache.solr.core.SolrCore – org.apache.solr.common.SolrException: Too many values for UnInvertedField faceting on field author_exact
> at org.apache.solr.request.UnInvertedField.<init>(UnInvertedField.java:181)
> at org.apache.solr.request.UnInvertedField.getUnInvertedField(UnInvertedField.java:664)
>
> I can see that we reached a limit of bucket size. Is there a way to adjust this? The index also seem to explode in size (217GB).
>
> Thinking that I had reached a limit for what a single core could handle in terms of facet, I deleted records in the index, but even now at 1/3 (32 million) it will still fails with above error. I have optimised with expungeDeleted=true. The index is  somewhat larger (76GB) than I would have expected.
>
> While we can still use the index and get facets back using enum method on that field, I would still like a way to fix the index if possible. Any suggestions?
>
> cheers,
> :-Dennis