Solr with Remote DB.
Issue:
I tried to connect to SOLR ( Preprocess and build index). It failed with following error.
Then I tried to increase timeout like this: 
C:\WCDE_ENT70\bin> di-buildindex.bat -masterCatalogId 10001 -solrConnTimeout 15000 
Then I got: 
Restarted server and it worked. Earlier these config values were pointing to wrong servers ( Linux machines). 
Server and port names should match with workspace\WC\xml\config\com.ibm.commerce.catalog-fep\wc-search.xml 
Issue:
I tried to connect to SOLR ( Preprocess and build index). It failed with following error.
INFO: Data import process was unsuccessful. An unrecoverable
error has occurred.
Throwable occurred:
org.apache.solr.client.solrj.SolrServerException:
org.apache.commons.httpclient.ConnectTimeoutException: The host did not accept the connection within
timeout of 100 ms
               
at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:480)
               
at
org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:246)
               
at org.apache.solr.client.solrj.request.AbstractUpdateRequest.process(AbstractUpdateRequest.java:105)
               
at
com.ibm.commerce.foundation.dataimport.process.util.SolrUtil.makeDataImportNoCleanCommand(SolrUtil.java:301)
               
at com.ibm.commerce.foundation.dataimport.process.DataImportProcessorMain.fullDataImport(DataImportProcessorMain.java:1379)
               
at
com.ibm.commerce.foundation.dataimport.process.DataImportProcessorMain.executeDIH(DataImportProcessorMain.java:759)
               
at com.ibm.commerce.foundation.dataimport.process.DataImportProcessorMain.main(DataImportProcessorMain.java:312)
org.apache.solr.client.solrj.SolrServerException: java.net.ConnectException: Connection refused: connect
SOLUTION:
Connection setting in DB for SOLR was wrong in remote DB ( which is running in Linux)
I have to update the tables SRCHCONF and SRCHCONFEXT to point it to local toolkit server.
update SRCHCONF set config='IndexScopeTag=0,SearchServerPort=80,SearchServerName=localhost,PreProcessConfigDirectory=C:\WCDE_E~1\search\pre-processConfig\MC_10001\DB2' where indextype='CatalogEntry';
update SRCHCONF set config='IndexScopeTag=1,SearchServerPort=80,SearchServerName=localhost,PreProcessConfigDirectory=C:\WCDE_E~1\search\pre-processConfig\MC_10001\DB2\CatalogGroup' where indextype='CatalogGroup';
update SRCHCONFEXT set config ='SearchServerPort=80,SearchServerName=localhost';
