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Solr 7.5 enabled autoscaling based replica placement by default but in the absence of default cluster policies, autoscaling can place more than 1 replica of the same shard on the same node. Also, the maxShardsPerNode and createNodeSet was not respected. Due to these reasons, this issue reverts the default replica placement policy to the 'legacy' assignment policy that was the default until Solr 7.4. (cherry picked from commit 7e2d40197cb096fe0519652c2ebbbf38a70d0d65)
The Solr test-framework products base classes and utility classes for writting JUnit tests excercising Solr functionality. This test framework relies on the lucene components found in in the ./lucene-libs/ directory, as well as the third-party libraries found in the ./lib directory.