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SOLR-7714: Add note about ShardHandler interface change to upgrade notes 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1689105 13f79535-47bb-0310-9956-ffa450edef68
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Ramkumar Aiyengar 2015-07-03 22:54:39 +00:00
parent ae4723e0b5
commit 7b2973f408
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solr/CHANGES.txt
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@ -103,6 +103,17 @@ Upgrading from Solr 5.2
* The "name" parameter in ADDREPLICA Collections API call has be deprecated. One cannot specify
the core name for a replica. See SOLR-7499 for more info.
* The ShardHandler interface has changed. The interface used to provide a
`checkDistributed` function which doubled up in purpose to determine if the
request is distributed, and to prepare for distributed requests. This unfortunately
meant that the object had to be instantiated even when the request is not
distributed. The task of initially determining if the request is distributed
is now done by SearchHandler using the distrib/shards parameters, and a
ShardHandler object is created only if the request is distributed. The interface
now has a `prepDistributed` function instead of the `checkDistributed` function,
which can then be used to prepare for the distributed request. Users with custom
ShardHandler implementations would need to modify their code to this effect.
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