* allow to access last operation tick of the transaction
* modify IResearchLink to rely on last commtted tick
* get rid of writing arangosearch markers to WAL
* further implementation
* local changes in iresearch
* add recovery states
* properly handle link creation during recovery
* adjust test cases
* properly handle nested transactions
* ungreylist recovery tests
* add more recovery tests
* do not use transaction to pass recovery tick
* do not store recoveryTick in MMFilesRecoveryState
* adjust tests
* fix mmfiles
* cleanup
* add context validity check
* fix tests
* fix more tests
* ensure subscription is not being released during commit
* address review comment
* final cleanup
* fix crash
* fix tests
* address test failures
* address review comments
* address review comments
* properly set recovery tick even if no recovery happened
# Conflicts:
# arangod/IResearch/IResearchLink.cpp
* start maintenance arangosearch threads after recovery is done
* ensure flush subscription is not being deallocated while in use
* add some tests
* properly determine storage engine
* adjust default view options
* stick to old index meta format in 3.5
* address test failures
* and cluster tests
* ensure flush subscriptions are being unsubscribed
* update tick even if no changes happened
* remove debug output
* fix test
* address review comments
* address test failures
* issue 535.1: ensure recovery success if link recovery starts right at the previous marker
* backport: initialize members
* backport: use string_ref instead if string copies
* issue 523.1: address build issues, ensure FlushFeature subscriptions are cleared during stop(), assert that they are deallocated
* backport: account for Flush subscriptions validly surviving past FlushFeature::stop()
* fix comment typo
* issue 466.4: implement persistence of IResearchLink WAL flush marker
* address enterprise test failure
* address test failures
* treat missing collections/indexes as potentially removed
* change view asertios to match collection assertions
* convert assertions to exceptions since they are possible
* revert assertion removal since assertions are actually valid for coordinator
* address scenario where link is dropped twice
* check for data store state before returning error
* revert last change since it's not valid for MMFiles
* avoid query cache double invalidation
* do not invalidate cache twice
* can't use CAS on directory_reader for the time being, protect with mutex instead
* do not lock properties during index consolidation
* reduce scope of _callbacksLock in FlushFeature
* prevent concurrent reader reopen
* Added feature phases
* BasicsPhase and DatabasePhase to the required files. Server now has Feature circles and does not boot. Will be sorted out later on.
* Added ClusterPhase to features
* Added V8Phase to the required features
* Added AQLPhase to the affected features
* Added ServerPhase to Features
* Added FoxxPhase to the relevant features
* Added AgencyPhase to the relevant features
* Moved registration from local variable SYS_SYSTEM_REPLICATION_FACTOR from cluster to V8 as their ordering is now vice versa
* Moved Bootstrap feature into FoxxPhase. It could be moved to ServerPhase easily if the FoxxQueue dependency would be removed
* Final movement of Startup Phases. Now solved all circles.
* Removed merge conflict
* Moved ReplicationTimeout into cluster phase and fixed cross-phase requirements
* Added greetings phase. This phase separates the Basics Phase and is the first to be run. Includes Logger and Hello/Goodbye
* Added the GreetingsPhase in the corresponding features. Now all BasicsPhase features start after greetings Phase. There is some issue in this branch which prevents the Agency from Gossipping right now. Will be fixed next
* Moved creation of the Agent into the prepare phase of the feature. THereby it is guaranteed that agents at least exists before the GeneralServer is activating endpoints
* Recovery needs to be started after the ServerID
* Moved log output of FeaturePhases to DEBUG instead of ERROR.
* Added feature phases for clients
* ClusterFeature now does not directly require AgencyFeature any more
* Added requirement of TravEngineRegistryFeature in AQL feature. Otherwise shutdown may be undefined
* The ApplicationServer can now handout the list of ordered features. Used for testing purposes
* Fixed IResearchVew Tests Setup to honor new feature ordering
* Fixed IResearchViewDBServer Tests Setup to honor new feature ordering
* Started fixing IResearchView Coordinator tests with startup ordering. Not finished yet
* Added startup phases to ViewCoordinator test
* Disabled expected logoutput in ClusterRepairsTest
* Fixed indention in test code
* LinkCoordinator now honors startup ordering
* Link meta now honors startup rdering
* Supress expected cluster logs in ViewTest
* Removed '#' accidentially added.
Andrey Abramov
Tobias Gödderz
jsteemann
Dan Larkin-York
Jan
Vasiliy
Jan Christoph Uhde
Frank Celler
Andrey Abramov
Dan Larkin-York
Michael Hackstein
Simon