* #7641 - Changing segment distribution algorithm to distribute segments to multiple segment cache locations
* Fixing indentation
* WIP
* Adding interface for location strategy selection, least bytes used strategy impl, round-robin strategy impl, locationSelectorStrategy config with least bytes used strategy as the default strategy
* fixing code style
* Fixing test
* Adding a method visible only for testing, fixing tests
* 1. Changing the method contract to return an iterator of locations instead of a single best location. 2. Check style fixes
* fixing the conditional statement
* Added testSegmentDistributionUsingLeastBytesUsedStrategy, fixed testSegmentDistributionUsingRoundRobinStrategy
* to trigger CI build
* Add documentation for the selection strategy configuration
* to re trigger CI build
* updated docs as per review comments, made LeastBytesUsedStorageLocationSelectorStrategy.getLocations a synchronzied method, other minor fixes
* In checkLocationConfigForNull method, using getLocations() to check for null instead of directly referring to the locations variable so that tests overriding getLocations() method do not fail
* Implementing review comments. Added tests for StorageLocationSelectorStrategy
* Checkstyle fixes
* Adding java doc comments for StorageLocationSelectorStrategy interface
* checkstyle
* empty commit to retrigger build
* Empty commit
* Adding suppressions for words leastBytesUsed and roundRobin of ../docs/configuration/index.md file
* Impl review comments including updating docs as suggested
* Removing checkLocationConfigForNull(), @NotEmpty annotation serves the purpose
* Round robin iterator to keep track of the no. of iterations, impl review comments, added tests for round robin strategy
* Fixing the round robin iterator
* Removed numLocationsToTry, updated java docs
* changing property attribute value from tier to type
* Fixing assert messages
* Exit JVM on curator unhandled errors
If an unhandled error occurs when curator is talking to ZooKeeper, exit
the JVM in addition to stopping the lifecycle to prevent the process
from being left in a zombie state. With this change,
BoundedExponentialBackoffRetryWithQuit is no longer needed as when
curator exceeds the configured retries, it triggers its unhandled error
listeners. A new "connectionTimeoutMs" CuratorConfig setting is added
mostly to facilitate testing curator unhandled errors, but it may be
useful for users as well.
* Address review comments
Sashidhar Thallam
Vadim Ogievetsky
Chi Cao Minh
Jonathan Wei
Lucas Capistrant
Gian Merlino