Hoss Man created SOLR-4942:
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Summary: Add more randomized testing of compound file format and
random merge policies
Key: SOLR-4942
URL: https://issues.apache.org/jira/browse/SOLR-4942
Project: Solr
Issue Type: Bug
Reporter: Hoss Man
Assignee: Hoss Man
SOLR-4926 seems to have uncovered some sporadic cloud/replication bugs related
to using compound files.
We should updated SolrTestCaseJ4 and the majority of our test configs to better
randomize the usage of compound files and merge policies.
Step #1...
* update test configs to use
{{<useCompoundFile>${useCompoundFile:false}</useCompoundFile>}}
* update SolrTestCaseJ4 to toggle that sys property randomly
Step #2...
* add a new RandomMergePolicy that implements MergePolicy by proxying to
another instance selected at creation using one of the
LuceneTestCase.new...MergePolicy methods
* updated test configs to refer to this new MergePolicy
* borrow the "tests.shardhandler.randomSeed" logic in SolrTestCaseJ4 to give
our RandomMergePolicy a consistent seed at runtime.
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