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.
SOLR-12804: Remove static modifier from Overseer queue access.
SOLR-12896: Introduce more checks for shutdown and closed to improve clean close and shutdown. (Partial)
SOLR-12897: Introduce AlreadyClosedException to clean up silly close / shutdown logging. (Partial)
SOLR-12898: Replace cluster state polling with ZkStateReader#waitFor. (Partial)
SOLR-12923: The new AutoScaling tests are way too flaky and need special attention. (Partial)
SOLR-12932: ant test (without badapples=false) should pass easily for developers. (Partial)
SOLR-12933: Fix SolrCloud distributed commit.
This commit deprecates the min_rf parameter. Solr now always includes the achieved replication
factor in the update requests (as if min_rf was always specified). Also, reverts the changes
introduced in SOLR-8034, replicas that don't ack an update will have to recover to prevent
inconsistent shards.
Extracted a new method to ensure a given number of jettys are always running in the test setup. Also, delete all collections created by other test methods.
While the startJettySolrRunner adds the given jetty instance to the internal list of jetty instances, the stopJettySolrRunner method does not remove the given instance from the list. This leads to inconsistencies such as stopped jettys retained in the internal list and duplicate (stopped) jettys. This commit also fixes TestCollectionsAPIViaSolrCloudCluster to deal with this change.
* MiniSolrCloudCluster.deleteAllCollections will now first delete aliases
* Minor refactorings to AliasesManager, AliasIntegrationTest, CreateRoutedAliasTest
CloudSolrClient.Builder can be pointed at a Solr cluster in two ways: a
ZK connection string, or one or more Solr base URLs. One of these two
values must be provided to create a working CloudSolrClient.
Since these values are required, this commit introduces two new ctors,
one for each means of CloudSolrClient setup. It deprecates the existing
no-arg CloudSolrClient ctor.
Together, these changes make it clearer to our users that these options
are required (and mutually exclusive).
