CDH 5 Release Notes

The following lists all Search engine server Jiras included in CDH 5 that are not included in the Search engine server base version 4.4.0. The solr-4.4.0-cdh5.0.1.CHANGES.txt file lists all changes included in CDH 5. The patch for each change can be found in the cloudera/patches directory in the release tarball.

Changes Not In Search engine server 4.4.0

Solr

Bug

[SOLR-5993] - ZkController can warn about shard leader conflict after conflict resolved
[SOLR-5796] - With many collections, leader re-election takes too long when a node dies or is rebooted, leading to some shards getting into a "conflicting" state about who is the leader.
[SOLR-5325] - zk connection loss causes overseer leader loss
[SOLR-5291] - Solrj does not propagate the root cause to the user for many errors.
[SOLR-5666] - Using the hdfs write cache can result in appearance of corrupted index.
[SOLR-5577] - indexing delay due to zookeeper election
[SOLR-5636] - SolrRequestParsers does some xpath lookups on every request.
[SOLR-5645] - A SolrCore reload via the CoreContainer will try and register in zk again with the new SolrCore.
[SOLR-4992] - Solr queries don't propagate Java OutOfMemoryError back to the JVM
[SOLR-5417] - The ChaosMonkey tests are not causing any disruption.
[SOLR-5540] - HdfsLockFactory should create the lock parent directory if necessary like SimpleLockFactory does.
[SOLR-4709] - dir lock error if reopening cores to fast?
[SOLR-5552] - Leader recovery process can select the wrong leader if all replicas for a shard are down and trying to recover as well as lose updates that should have been recovered.
[SOLR-5243] - killing a shard in one collection can result in leader election in a different collection
[SOLR-5240] - SolrCloud node doesn't (quickly) come all the way back
[SOLR-5187] - We are shipping with the wrong license for NetCDF.
[SOLR-5133] - HdfsUpdateLog can fail to close a FileSystem instance if init is called more than once.
[SOLR-5135] - Deleting a collection should be extra aggressive in the face of failures.
[SOLR-3633] - web UI reports an error if CoreAdminHandler says there are no SolrCores
[SOLR-5018] - The Overseer should avoid publishing the state for collections that do not exist under the /collections zk node.

Improvement

[SOLR-5156] - Provide a way to move the contents of a file to ZooKeeper with ZkCLI
[SOLR-5581] - Give ZkCLI the ability to get files
[SOLR-5576] - ZkController.java registerAllCoresAsDown multiple cores logic
[SOLR-5548] - Give DistributedSearchTestCase / JettySolrRunner the ability to specify extra filters
[SOLR-5134] - Have HdfsIndexOutput extend BufferedIndexOutput

New Feature

[SOLR-5556] - Allow class of CollectionsHandler and InfoHandler to be specified in solr.xml
[SOLR-4943] - Add a new info admin handler.