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https://issues.apache.org/jira/browse/SOLR-11287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16141780#comment-16141780
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Erick Erickson commented on SOLR-11287:
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Hmm, SOLR-4997 indicates that this was fixed in Solr 4.4. Do the Solr logs show
a commit happening on the sub-shards? If this has crept back in somehow we need
to fix it.
Could you try this with the 7x code line by any chance?
About the docs: The way the docs are created before the asciidoc changes makes
it very hard to change old reference material, and there won't be any fixes for
the 5x code line.
> Sub-shards by SPLITSHARD loses data on restarting SOLR
> ------------------------------------------------------
>
> Key: SOLR-11287
> URL: https://issues.apache.org/jira/browse/SOLR-11287
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Affects Versions: 5.5.1
> Environment: Ubuntu 64-bit 32-core server, 240GB RAM
> Reporter: Vannia Rajan
> Priority: Minor
> Labels: documentation-update
>
> We are running SOLR 5.5.1 with 4 nodes (1 shard per node). We are in the
> process of splitting the 4 shards into 8 shards.
> The SPLITSHARD collections API works great - it does create the sub-shards
> and activates sub-shards, inactivates the parent shard upon completion. The
> row count compard with parent shard vs sub-shards are matching. However, the
> data in sub-shards doesn't seem to be persistent in our case.
> A restart of SOLR leaves the sub-shards with 0 documents with their data
> directory sizes getting reduced from 40+ GB to 71KB.
> If I'm missing any other steps to be followed after SPLITSHARD to make the
> data in sub-shards persistent, please let me know. Otherwise, I feel this may
> be a bug in v5.5.1.
> Note: I was able to manually set the states of parent to "active" and
> children with 0 documents as "inactive" by setting
> /collections/{collection}/state.json in zookeeper, to get back the lost data.
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