Hi, Reviewing the solr's log I found this message.
The solr version is 4.2.1, running in a tomcat 7 4973652:SEVERE: Too many close [count:-1] on org.apache.solr.core.SolrCore@5795a627. Please report this exception to solr-user@lucene.apache.org 5003386:SEVERE: REFCOUNT ERROR: unreferenced org.apache.solr.core.SolrCore@5795a627 (XXXX) has a reference count of -1 2965529:SEVERE: Too many close [count:-1] on org.apache.solr.core.SolrCore@7722b49b. Please report this exception to solr-user@lucene.apache.org 52965531:SEVERE: Too many close [count:-1] on org.apache.solr.core.SolrCore@32530662. Please report this exception to solr-user@lucene.apache.org 52965533:SEVERE: Too many close [count:-1] on org.apache.solr.core.SolrCore@144e2972. Please report this exception to solr-user@lucene.apache.org 52971283:SEVERE: Too many close [count:-1] on org.apache.solr.core.SolrCore@1705c88e. Please report this exception to solr-user@lucene.apache.org 52978567:SEVERE: Too many close [count:-1] on org.apache.solr.core.SolrCore@c200c62. Please report this exception to solr-user@lucene.apache.org ----- Best regards -- View this message in context: http://lucene.472066.n3.nabble.com/Too-many-close-count-1-tp4058129.html Sent from the Solr - User mailing list archive at Nabble.com.