SOLR-13996: Refactor HttpShardHandler.prepDistributed method into smaller pieces
This commit introduces an interface named ReplicaSource which is marked as experimental. It has two sub-classes named CloudReplicaSource (for solr cloud) and LegacyReplicaSource for non-cloud clusters. The prepDistributed method now calls out to these sub-classes depending on whether the cluster is running on cloud mode or not.
Java 13 adds a new doclint check under "accessibility" that the html
header nesting level isn't crazy.
Many are incorrect because the html4-style javadocs had horrible
font-sizes, so developers used the wrong header level to work around it.
This is no issue in trunk (always html5).
Java recommends against using such structured tags at all in javadocs,
but that is a more involved change: this just "shifts" header levels
in documents to be correct.
Current javadocs declare an HTML5 doctype: !DOCTYPE HTML. Some HTML5
features are used, but unfortunately also some constructs that do not
exist in HTML5 are used as well.
Because of this, we have no checking of any html syntax. jtidy is
disabled because it works with html4. doclint is disabled because it
works with html5. our docs are neither.
javadoc "doclint" feature can efficiently check that the html isn't
crazy. we just have to fix really ancient removed/deprecated stuff
(such as use of tt tag).
This enables the html checking in both ant and gradle. The docs are
fixed via straightforward transformations.
One exception is table cellpadding, for this some helper CSS classes
were added to make the transition easier (since it must apply padding
to inner th/td, not possible inline). I added TODOs, we should clean
this up. Most problems look like they may have been generated from a
GUI or similar and not a human.
SOLR-14095 Introduced an issue for rolling restarts (Incompatible Java serialization). This change fixes the compatibility issue while keeping the functionality in SOLR-14095
This also fixes a bug where an inability to assign a node based on existing autoscaling policy resulted in a server error instead of a bad request.
This closes#1152.
* DocValuesFieldExistsQuery and NormsFieldExistsQuery are used for existence queries when possible.
* Added documentation on the difference between field:* and field:[* TO *]
* Use Caffeine impl and weak values (to the schema). Previously the cache never evicted!
* now populating the configSet name from ZK into CloudDescriptor when CloudDescriptor is loaded
* actual schema name needs to be deterministic now; fallback from non-existent managed-schema to schema.xml will thwart this cache
* a test conf/core.properties wasn't actually used and became a problem in it's weird location after I refactored some logic