[SOLR-9154] Config API does not work when adding a component with DirectSolrSpellChecker

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.4, 7.0
• Component/s: config-api, spellchecker
• Assignee: Anshum Gupta
• Reporter: Anshum Gupta
• Created: 24/May/16 04:15
• Updated: 02/Jan/17 18:34
• Resolved: 02/Jan/17 18:34

Description

When trying to add a DirectSolrSpellchecker using the Config API (JSON), there seems to be a loss of information w.r.t the param types. The accuracy field, only in this specific case needs to be defined as a float it seems. While this is possible when updating the solrconfig,xml directly, the field type (float) can not be specified using JSON.

Here are the steps to reproduce this issue:

#Bootstrapping
bin/solr start -c
bin/solr create -c foo
bin/post -c foo example/exampledocs/books.csv

#Add spell checker - This would hang and the logs contain recurring exceptions as mentioned below
curl http://localhost:8983/solr/foo/config -H 'Content-type:application/json' -d '{"update-searchcomponent": {"name":"spellcheck",       "class":"solr.SpellCheckComponent",       "spellchecker":[         { "name":"text_index_dictionary", "field":"text", "classname":"solr.DirectSolrSpellChecker", "distanceMeasure":"org.apache.lucene.search.spell.LevensteinDistance", "accuracy":0.5, "maxEdits":2, "minPrefix":1, "maxInspections":5, "minQueryLength":4, "maxQueryFrequency":0.001, "thresholdTokenFrequency":0.01}]}}'

Log:

2016-05-24 04:08:44.371 ERROR (SolrConfigHandler-refreshconf) [c:foo s:shard1 r:core_node1 x:foo_shard1_replica1] o.a.s.h.SolrConfigHandler Unable to refresh conf 
org.apache.solr.common.SolrException: Unable to reload core [foo_shard1_replica1]
	at org.apache.solr.core.CoreContainer.reload(CoreContainer.java:944)
	at org.apache.solr.core.SolrCore.lambda$getConfListener$7(SolrCore.java:2510)
	at org.apache.solr.handler.SolrConfigHandler$Command$1.run(SolrConfigHandler.java:218)
Caused by: org.apache.solr.common.SolrException: java.lang.Double cannot be cast to java.lang.Float
	at org.apache.solr.core.SolrCore.<init>(SolrCore.java:773)
	at org.apache.solr.core.SolrCore.reload(SolrCore.java:462)
	at org.apache.solr.core.CoreContainer.reload(CoreContainer.java:938)