[SOLR-11180] OriginalScoreFeature always returns 0.0 with SolrCloud mode.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.5
• Fix Version/s: 7.1, 8.0
• Component/s: contrib - LTR

Environment

Repro on SolrCloud mode. Working ok with a standalone instance.

• Assignee: Christine Poerschke
• Reporter: Jonathan Gonzalez
• Created: 02/Aug/17 17:38
• Updated: 08/Jun/19 15:23
• Resolved: 25/Aug/17 14:54

Description

This bug is related to SOLR-11164.

org.apache.solr.ltr.feature.OriginalScoreFeature is always returning 0.0 when configured LTR features are evaluated within a SolrCloud cluster.

{
	"responseHeader": {
		"zkConnected": true,
		"status": 0,
		"QTime": 10,
		"params": {
			"q": "test",
			"fl": "id,score,[features]"
		}
	},
	"response": {
		"numFound": 2,
		"start": 0,
		"maxScore": 1.7527907,
		"docs": [
			{
				"id": "GB18030TEST",
				"[features]": "originalScore=0.0",
				"score": 1.7527907
			},
			{
				"id": "UTF8TEST",
				"[features]": "originalScore=0.0",
				"score": 1.5209608
			}
		]
	}
}

Furthermore, is throwing an exception when the query parser is used.

{
	"responseHeader": {
		"zkConnected": true,
		"status": 500,
		"QTime": 18,
		"params": {
			"q": "test",
			"fl": "id,score,[features]",
			"rq": "{!ltr model=model reRankDocs=100}"
		}
	},
	"error": {
		"metadata": [
			"error-class",
			"org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException",
			"root-error-class",
			"org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException"
		],
		"msg": "Error from server at http://someip:8983/solr/gettingstarted_shard2_replica1: Server Error\n\nrequest: http://someip:8983/solr/gettingstarted_shard2_replica1/query",
		"trace": "org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error from server at http://someip:8983/solr/gettingstarted_shard2_replica1: Server Error\n\nrequest: http://someip:8983/solr/gettingstarted_shard2_replica1/query\r\n\tat org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:610)\r\n\tat org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:279)\r\n\tat org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:268)\r\n\tat org.apache.solr.client.solrj.SolrClient.request(SolrClient.java:1219)\r\n\tat org.apache.solr.handler.component.HttpShardHandler.lambda$submit$0(HttpShardHandler.java:163)\r\n\tat java.util.concurrent.FutureTask.run(FutureTask.java:266)\r\n\tat java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)\r\n\tat java.util.concurrent.FutureTask.run(FutureTask.java:266)\r\n\tat com.codahale.metrics.InstrumentedExecutorService$InstrumentedRunnable.run(InstrumentedExecutorService.java:176)\r\n\tat org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:229)\r\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)\r\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)\r\n\tat java.lang.Thread.run(Thread.java:745)\r\n",
		"code": 500
	}
}

Attached a file with a sample on how to repro:

• Use bin\solr -e cloud -Dsolr.ltr.enabled=true to create a sample SolrCloud with techproducts.
• Features file with only OriginalScoreFeature
• Simple model using that feature.

Issue Links

• is duplicated by: SOLR-11220 Extracting original score (OriginalScoreFeature) will return 0.0 in SolrCloud
• relates to: SOLR-11164 OriginalScoreFeature causes NullPointerException during feature logging with SolrCloud mode.