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Hazelcast v4.1-BETA Release Notes

Release Date: 2020-09-09 // over 3 years ago

  • 🚀 This document lists the new features, enhancements, fixed issues and, removed or deprecated features for Hazelcast IMDG 4.1-BETA-1 release. The numbers in the square brackets refer to the issues in Hazelcast's GitHub repositories.

    🆕 New Features

    ✨ Enhancements

    The following are the other improvements performed to solve the enhancement
    issues opened by the Hazelcast customers/team.

    • ➕ Added support for the merge operation in IMap. [#17419]
    • ➕ Added support for publishing CP Subsystem and CP data structure
      statistics via Metrics. [#17369]
    • ➕ Added public classes to expose the member- and
      client-side caching provider implementations (in the JCache implementation)
      without referring to internal classes. [#17320]
    • 👌 Improved the entry processing mechanism so that the read-only processors on backups
      are not executed anymore. [#17318]
    • 👌 Improved CacheSimpleConfig so that it now accepts cache name in its constructors. [#17287]
    • ➕ Added support for advanced persistent memory configuration. [#17282]
    • 🌲 Cleaned up the noisy initial log messages on Hazelcast startups. [#17243]
    • ⏱ Introduced auto-disposable tasks for the scheduled executor service. [#17215]
    • ➕ Added support for configurable priority queues. [#17201]
    • Parallelized the partition replica migrations so that
      the time needed for rebalancing the partitions after adding
      or removing a member to/from a cluster is reduced. [#17197]
    • ➕ Added support for basic SQL expressions. [#17183]
    • ➕ Added client labels to ClientEndpointImpl.toString()
      to simplify the client identification (in addition to client uuid)
      on the Hazelcast member side. [#17178]
    • ➕ Added the statistics entry to phone home, that counts the caches having WAN replication
      🔧 configured. [#17143]
    • ➕ Added support for tenant control when creating caches. [#17122]
    • ➕ Added support for accessing domain objects without domain classes (GenericRecord). [#17105]
    • ➕ Added metric count support for sets, and maps having backup reads enabled,
      🔧 query caches, map stores, custom attributes and WAN replication configurations.
      [#17053], [#17071], [#17069], [#17081]
    • ➕ Added support for IMap.compute(). [#17030]
    • ➕ Added support to allow submitting and executing operations while a member
      is shutting down to increase the availability of a cluster more that keeps
      large data. [#17028]
    • ➕ Added ExtendedMapEntry in order to create a mechanism for setting TTLs in
      entry processors. [#16991]
    • ➕ Added hazelcast-azure discovery plugin to the hazelcast-all module. [#16982]
    • Introduced the ConfigRecognition API that determines if a
      🔧 provided declarative configuration is recognized by the rules defined in a given
      implementation. Along with the API the following three implementations are added:
      ** MemberConfigRecognizer for recognizing member XML and YAML configurations
      ** ClientConfigRecognizer for recognizing client XML and YAML configurations
      ** ClientFailoverConfigRecognizer for recognizing failover client XML and YAML configurations
      [#16958]
    • 🔊 Made the diagnostics logs more cloud-friendly so that they are sent to
      stdout instead of sending to local files. [#16941]
    • 👌 Improved the mechanism of partition table updates to
      ⚡️ eliminate the latencies when these updates are sent to the clients by a member. [#16939]
    • 👌 Improved the client configuration such that when the client
      🔧 failover configuration is provided, the reconnect mode cannot
      be set as off; it now fails fast in this case. [#16886]
    • 👍 Introduced the forEach() loop support for IMap. [#16877]
    • ➕ Added the load() method to Config, ClientConfig and
      🔧 ClientFailoverConfig classes. This method loads the configuration
      🔧 with the known locations. If not found, the default configuration is returned. [#16864]
    • 👌 Improved the deleteAll() (MapStore) and ITopic Javadocs. [#16862], [#16861],
    • Introduced the ServerConnection and ClientConnection interfaces
      that extend Connection for cleaning up purposes. [#16849]
    • Implemented the root operator for the SQL engine
      responsible for getting the final result stream. [#16829]
    • ➕ Added support for IMap.computeIfAbsent(). [#16808]
    • Introduced SQL thread pools for query processing. [#16805]
    • Introduced the network protocol, base executor and row
      interfaces for the SQL engine. [#16799], [#16762]
    • ➕ Added the setAll() and setAllAsync() methods for IMap. [#16787]
    • ➕ Added the writeOrdered() method to the Connection class
      for the purpose of ordered delivery of messages. [#16776]
    • ➕ Added the creation time metric for the executor service. [#16775]
    • 👌 Improved an unclear exception message for credentials. [#16756]
    • ⚡️ Updated the related aspects of Hazelcast IMDG after the
      🔄 changes done on the client protocol side to add the ability
      to add new parameters, methods, services, events and custom types
      to codecs. [#16718]
    • ➕ Added the offset parameter that can be used while creating
      inputs in BufferObjectDataInput. [#16701]
    • Introduced the putAllAsync() method for MultiMap. [#16698]
    • Defined metrics for ISet and IList collections. [#16665]
    • ⬆️ Upgraded log4j2 version to 2.13.0. [#16654]
    • 📇 Renamed MultiMap proxy implementation to follow the established naming convention:
      ObjectMultiMapProxy -> MultiMapProxyImpl. [#16637]
    • 👌 Improved the computeIfPresent() implementation so that now it keeps a
      👯 clone of the old/existing value and uses that for replace/delete operations. [#16636]
    • 🌲 Introduced the hazelcast.logging.details.enabled property
      🌲 to make the logging of cluster version, name and IP optional to
      ⬇ decrease the noise in the logs when, for example, you have a single-member cluster. [#16622]

    - ⬆️ Upgraded the Hazelcast Kubernetes plugin version to 2.0.1. [#16590]

    • Added the support for automatically detecting the classloader
      🚀 of a type for the user code deployment feature. [#16585]
      • Made IMap.putAllAsync() and IMap.submitToKeys() methods public API. [#16449]
      • Implemented the base type system for SQL: the base SQL data types
        have been defined and mapped to the corresponding Java types.
        Type information is used by executor stages to use the right strategy
        of expression evaluation. [#15241]
      • 👻 Clarified the exception message when you connect to a cluster with an
        invalid group name. [#15099]
      • 🔨 Refactored the check and retry initialization logic of
        ReplicatedMapProxy so that they are performed in parallel for different
        partitions. [#14331]
      • ➕ Added a test for the ClientConsoleApp class. [#12298]
      • 👌 Improved the behavior of ConcurrentMap.computeIfPresent:
        combined single client-server round trips instead of two (for get and
        replace methods). [#11958]

    💥 Breaking Changes

    • In a CP subsystem session, a generic IllegalStateException was being thrown when Hazelcast
      is shutdown. Now the same situation throws HazelcastInstanceNotActiveException. [#17120]
    • The TcpIpConnection class has been renamed as ServerConnection. [#16839]

    🛠 Fixes

    • 🛠 Fixed an issue where the custom load balancers
      🔧 could not be configured declaratively. [#17415]
    • 🛠 Fixed the issue of dangling pointers in global indexes. [#17338]
    • 🛠 Fixed a race issue when creating a cache (JCache) using
      multiple methods with the same cache name but having different keys.[#17286]
    • 🛠 Fixed an issue where the repeated calls of executeOnKeys()
      in Hazelcast clients for NATIVE maps was causing a continuous
      increase in the used memory and exhaustion of the memory pool after a while. [#17276]
    • 🛠 Fixed an issue where ReliableTopicMessageListener was firing a warning when the client is shutting down. [#17153]
    • 🛠 Fixed an issue where the client was stuck with an outdated
      member list after a split-brain scenario. [#17147]
    • 🛠 Fixed the broken interoperability between the CompletableFuture methods. [#17020]
    • 🛠 Fixed an issue where touching a map entry having an entry processor working on it
      was modifying its time-to-live. [#16987]
    • 🛠 Fixed an issue in the cache service where its pre-join
      operation was considering CacheConfig as resolved: it
      was assuming that key/value types, user customizations and
      🔧 other cache configurations have been loaded. This was an issue
      when the cache is not touched yet. [#16917]
    • 🛠 Fixed an issue where Management Center was not working as expected
      🔧 when the cluster is set up using advanced network configuration. [#16910]
    • 🛠 Fixed an issue where ServiceLoader was round-tripping between URL and URI,
      and consequently loses the associated URLStreamHandler when trying to load
      Hazelcast from a custom class loader. [#16846]
    • 🛠 Fixed an issue where the class definitions, that are registered explicitly in
      🔧 the serialization configuration and have the same class ID in different factories,
      were not handled properly. [#16831]
    • 🛠 Fixed the NullPointerException in IndexCopyBehavior.NEVER mode. [#16784]
    • 🛠 Fixed an issue where the client permissions for Reliable Topic and Ringbuffer
      we're missing. [#16755]
    • 🛠 Fixed an issue where the type information was missing the Metrics MBeans. [#16747]
    • 🛠 Fixed an issue where the RESP API was always requiring the call URLs
      to end with a slash character. [#16688]
    • 🛠 Fixed an issue where the service URL for Eureka could not be set
      🔧 using the declarative configuration. [#16679]
    • 🛠 Fixed an issue where the wait key of a blocking call within
      a Raft invocation was still being reported as a live operation,
      when the key times out. [#16614]
    • 🛠 Fixed an issue where the upload of classes using the client
      🚀 user code deployment were not successful when they are retrieved not
      in their created order. [#16612]
    • 🛠 Fixed an issue where the size() method was returning a negative
      value when map, cache and multimap contain more than Integer.MAX_VALUE entries. [#16594]
    • 🛠 Fixed an invalidation issue when using a transactional map
      from a cache with a Near Cache: the cache invalidation event occurs
      when the transactionalMap.put method is called. As a result,
      the entry was getting invalidated before the change is committed to the map. [#16579]
    • 🛠 Fixed an issue where InPredicate was not invoking value comparison when the
      read attribute is null. [#15100]
    • 🛠 Fixed an issue where Map, Cache, MultiMap data structures
      were returning negative values (size()) when the size is more than
      Integer.MAX_VALUE. [#14935]

    Contributors

    We would like to thank the contributors from our open source
    🚀 community who worked on this release:

    • Inel Pandzic
    • Omid Pourhadi
    • Ryan Lindeborg
    • Santhosh Kumar
    • Bartek Kowalczyk
    • Ashutosh Agrawal
    • Ádám Berkecz
    • HugeOrangeDev
    • Harry Tran
    • Stephen Russett
    • Ulf Adams
    • Abdul Aziz Ali
    • Dmitry Konstantinov
    • Anmol Chaddha
    • lprimak
    • keteracel
    • Burak Sezer
    • wangumer
    • Marcin L