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https://issues.apache.org/jira/browse/SOLR-10865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amrit Sarkar updated SOLR-10865:
--------------------------------
    Attachment: SOLR-10865.patch

Also it would be best if we specify this bit of information => 

enable *enable.runtime.lib* while starting up solr nodes to support:
processor=X to invoke XUpdateRequestProcessor.

Patch uploaded with slight adjustments.

> parameter processor=Template doesn't invoke TemplateUpdateProcessorFactory.
> ---------------------------------------------------------------------------
>
>                 Key: SOLR-10865
>                 URL: https://issues.apache.org/jira/browse/SOLR-10865
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: update
>    Affects Versions: master (7.0)
>            Reporter: Amrit Sarkar
>         Attachments: SOLR-10865.patch, SOLR-10865.patch
>
>
> Ref docs::
> {quote}
> The TemplateUpdateProcessorFactory can be used to add new fields to documents 
> based on a template pattern.
> This can be used directly in a request without any configuration. To enable 
> this processor, use the parameter processor=Template.
> {quote}
> Sample curl::
> {code}
> curl -X POST -H 'Content-Type:application/json' 
> 'http://localhost:8983/solr/gettingstarted/update/json/docs?processor=Template&Template.field=fullName_s:AmritSarkar&commit=true'
>  --data-binary '{"id": 1,"title": "titleA"}'
> {code}
> I am receiving exception::
> {code}
> <?xml version="1.0" encoding="UTF-8"?>
> <response>
> <lst name="responseHeader"><int name="status">400</int><int 
> name="QTime">3</int></lst><lst name="error"><lst name="metadata"><str 
> name="error-class">org.apache.solr.common.SolrException</str><str 
> name="root-error-class">org.apache.solr.common.SolrException</str></lst><str 
> name="msg">No such processor Template</str><int name="code">400</int></lst>
> </response>
> {code}
> {code}
> ERROR - 2017-06-10 07:39:51.598; [c:gettingstarted s:shard2 r:core_node1 
> x:gettingstarted_shard2_replica_n1] org.apache.solr.common.SolrException; 
> org.apache.solr.common.SolrException: No such processor Template
>       at 
> org.apache.solr.update.processor.UpdateRequestProcessorChain.getReqProcessors(UpdateRequestProcessorChain.java:286)
>       at 
> org.apache.solr.update.processor.UpdateRequestProcessorChain.constructChain(UpdateRequestProcessorChain.java:235)
> {code}
> I looked into how the testclass has been created::
> TemplateUpdateProcessorTest::
> {code}
>   public void testSimple() throws Exception {
>     AddUpdateCommand cmd = new AddUpdateCommand(new 
> LocalSolrQueryRequest(null,
>         new ModifiableSolrParams()
>             .add("processor", "Template")
>             .add("Template.field", "id:${firstName}_${lastName}")
>             .add("Template.field", "another:${lastName}_${firstName}")
>             .add("Template.field", "missing:${lastName}_${unKnown}")
>     ));
>     cmd.solrDoc = new SolrInputDocument();
>     cmd.solrDoc.addField("firstName", "Tom");
>     cmd.solrDoc.addField("lastName", "Cruise");
>     new TemplateUpdateProcessorFactory().getInstance(cmd.getReq(), new 
> SolrQueryResponse(), null).processAdd(cmd);
>     assertEquals("Tom_Cruise", cmd.solrDoc.getFieldValue("id"));
>     assertEquals("Cruise_Tom", cmd.solrDoc.getFieldValue("another"));
>     assertEquals("Cruise_", cmd.solrDoc.getFieldValue("missing"));
>   }
> {code}
> *There is no test to check whether _processor=Template_ works or not*, 
> TemplateUpdateProcessorFactory() object is EXPLICITLY created to getInstance 
> and do processing on the updates.



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