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Christine Poerschke commented on SOLR-5213: ------------------------------------------- A variation of the patch i uploaded here would be to 'rescue' (and id+hash log) any documents that would have been lost otherwise e.g. always put them in the first sub-shard, they don't belong there but at least that way they are not lost and could be analysed and dealt with later on. > collections?action=SPLITSHARD parent vs. sub-shards numDocs > ----------------------------------------------------------- > > Key: SOLR-5213 > URL: https://issues.apache.org/jira/browse/SOLR-5213 > Project: Solr > Issue Type: Improvement > Components: update > Affects Versions: 4.4 > Reporter: Christine Poerschke > Assignee: Shalin Shekhar Mangar > Attachments: SOLR-5213.patch > > > The problem we saw was that splitting a shard took a long time and at the end > of it the sub-shards contained fewer documents than the original shard. > The root cause was eventually tracked down to the disappearing documents not > falling into the hash ranges of the sub-shards. > Could SolrIndexSplitter split report per-segment numDocs for parent and > sub-shards, with at least a warning logged for any discrepancies (documents > falling into none of the sub-shards or documents falling into several > sub-shards)? > Additionally, could a case be made for erroring out when discrepancies are > detected i.e. not proceeding with the shard split? Either to always error or > to have an verifyNumDocs=false/true optional parameter for the SPLITSHARD > action. -- This message was sent by Atlassian JIRA (v6.1#6144) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org