anchor.diff:  * Log node ID on startup {pull}21673[#21673]
   * Ensure source filtering automatons are only compiled once {pull}20857[#20857] (issue: {issue}20839[#20839])
   * Improve scheduling fairness when batching cluster state changes with equal priority {pull}20775[#20775] (issue: {issue}20768[#20768])
  -* Add production warning for pre-release builds {pull}20674[#20674]
  -* Add serial collector bootstrap check {pull}20558[#20558]
   * Do not log full bootstrap checks exception {pull}19989[#19989]
   
   Exceptions::
  
positive.code: * Remove special case in case no action filters are registered {pull}21251[#21251]
  * Use TimveValue instead of long for CacheBuilder methods {pull}20887[#20887]
  * Remove SearchContext#current and all it's threadlocals {pull}20778[#20778] (issue: {issue}19341[#19341])
  * Remove poor-mans compression in InternalSearchHit and friends {pull}20472[#20472]
  
  Java REST Client::
  * Provide error message when rest request path is null {pull}21233[#21233] (issue: {issue}21232[#21232])
  
negative.code: * Throw error if query element doesn't end with END_OBJECT {pull}20528[#20528] (issue: {issue}20515[#20515])
  * Remove `lowercase_expanded_terms` and `locale` from query-parser options. {pull}20208[#20208] (issue: {issue}9978[#9978])
  
  Reindex API::
  * Make reindex-from-remote ignore unknown fields {pull}20591[#20591] (issue: {issue}20504[#20504])
  
  Scripting::
  