This is a frequent problem with Solr. Like Peter says, you may need to learn a 
bit about tuning Solr in your environment and slowing down your commits. You 
may also want to allocate more RAM to Solr if possible.  See the Solr wiki 
http://wiki.apache.org/solr/FAQ#What_does_.22exceeded_limit_of_maxWarmingSearchers.3DX.22_mean.3F
 



Jason Stirnaman
Biomedical Librarian, Digital Projects
A.R. Dykes Library, University of Kansas Medical Center
jstirna...@kumc.edu
913-588-7319


>>> On 12/15/2010 at 12:52 PM, in message 
>>> <aanlktim85acvqyxxkk6lwzbsozakxqxyys0qxfrnz...@mail.gmail.com>, Peter Dietz 
>>> <dietz...@osu.edu> wrote:


Hi George, 



This has come up on the lists ( 
http://www.mail-archive.com/dspace-tech@lists.sourceforge.net/msg10744.html ), 
the default setting that was shipped 1.6 with wasn't ideal as it had a tendency 
to bog down the system under medium usage. This has been fixed in 1.7, but in 
the meantime, there are some steps you can do to fix your system. 



Switch to use SOLR autoCommit. Which writes data to solr once per 10 minutes, 
as opposed to a new write after every millisecond there is activity. 

http://atmire.com/statistics_performance 



Solr optimize. Run daily maintenance on your solr index so that it remains 
performant. 

https://jira.duraspace.org/browse/DS-615 



--
Peter Dietz
Systems Developer/Engineer
Ohio State University Libraries




On Wed, Dec 15, 2010 at 6:22 AM, George Stanley Kozak <g...@cornell.edu> wrote:



Hi...

I was made aware of a problem with the SOLR stats. If someone clicks on the 
View Statistics button for an item, they cannot get to the statistics. The 
Browser just hangs.

In the logs I see:

ERROR org.dspace.statistics.SolrLogger @ Error opening new searcher. exceeded 
limit of maxWarmingSearchers=2, try again later.

Error opening new searcher. exceeded limit of maxWarmingSearchers=2, try again 
later.

Has anyone else seen this and does anyone have any suggestions?

For the time being, I have limited the stats to the Admins.

George Kozak
Digital Library Specialist
Division of Library Information Technologies (DLIT)
501 Olin Library
Cornell University
Ithaca, NY 14853
607-255-8924
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