: I am trying to understand update request processor chains. Do they runs one : by one when indexing a ducument? Can I identify multiple update request : processor chains? Also what are that LogUpdateProcessorFactory and : RunUpdateProcessorFactory?
http://wiki.apache.org/solr/UpdateRequestProcessor "solrconfig.xml files can contain any number of UpdateRequestProcessorChains..." "Once one or more update chains are defined, you may select one on the update request through the parameter update.chain" https://lucene.apache.org/solr/4_2_1/solr-core/org/apache/solr/update/processor/LogUpdateProcessorFactory.html " This keeps track of all commands that have passed through the chain and prints them on finish(). At the Debug (FINE) level, a message will be logged for each command prior to the next stage in the chain. " https://lucene.apache.org/solr/4_2_1/solr-core/org/apache/solr/update/processor/RunUpdateProcessorFactory.html "Executes the update commands using the underlying UpdateHandler. Allmost all processor chains should end with an instance of RunUpdateProcessorFactory unless the user is explicitly executing the update commands in an alternative custom UpdateRequestProcessorFactory" -Hoss
