Christine Poerschke created SOLR-5214:
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             Summary: collections?action=SPLITSHARD running out of heap space 
due to merge
                 Key: SOLR-5214
                 URL: https://issues.apache.org/jira/browse/SOLR-5214
             Project: Solr
          Issue Type: Improvement
          Components: update
    Affects Versions: 4.3
            Reporter: Christine Poerschke


The problem we saw was that splitting a shard with many segments and documents
failed by running out of heap space.

Increasing heap space so that all existing segments could be merged into one
overall segment does not seem practical. Running the split without segment
merging worked.

Could split always run without merging, or merge=true/false be an optional 
parameter for the SPLITSHARD action?



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