[SOLR-6771] Sending DIH request to non-leader can result in different number of successful documents

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 4.10
• Component/s: contrib - DataImportHandler
• Assignee: Unassigned
• Reporter: Greg Harris
• Created: 20/Nov/14 20:14
• Updated: 29/Aug/20 19:50
• Resolved: 29/Aug/20 19:50

Description

Basically if you send a DIH request to the non-leader the following set of circumstances can occur:
1) If there are errors in some of the documents the request itself is rejected by the leader (try making a required field null with some documents to make sure there are rejections).
2) This causes all documents on that request to appear to fail. The number of documents that a follower is able to update DIH with appears variable.
3) You need to use a large number of documents it appears to see the anomaly.

This results in the following error on the follower:
2014-11-20 12:06:16.470; 34054 [Thread-18] WARN org.apache.solr.update.processor.DistributedUpdateProcessor – Error sending update
org.apache.solr.common.SolrException: Bad Request

request: http://10.0.2.15:8983/solr/collection1/update?update.distrib=TOLEADER&distrib.from=http%3A%2F%2F10.0.2.15%3A8982%2Fsolr%2Fcollection1%2F&wt=javabin&version=2
at org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrServer$Runner.run(ConcurrentUpdateSolrServer.java:240)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)

Issue Links

• is superceded by: SOLR-14783 Remove DIH from 9.0