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KAR: A Runtime for the Hybrid Cloud

KAR 1.3.10 - 2023-06-07

  • Don't log errors from within backoff loop (#391)
  • Update metrics documentation and scripts (#390)
  • Fix debugger and metrics for Kubernetes single-container mode (#389)

KAR 1.3.9 - 2023-05-22

  • Prioritize non-sidecar mode on Kubernetes (#386)
  • Update kar-logstack.md (#385)
  • Support multiple kind versions; add kind 0.19.0 (#383)

KAR 1.3.8 - 2023-05-15

  • Update k3d ingress setup (#380)
  • Remove placeholder value for redis password (#379)

KAR 1.3.7 - 2023-05-05

  • Revert #351 - Container Shipping application assumes co-mingled primary/submap state in getAll

KAR 1.3.6 - 2023-05-03

  • General refresh of dependencies
    • Update Kafka version to 3.3 and ZooKeeper to 3.8
    • Update JavaScript SDK, examples, and Dockerfiles to use Node.js 18
    • Update Java SDKs to OpenLiberty 23.0.0.3 and Quarkus 2.16.Final
    • Switch from adoptopenjdk to eclipse-temurin as base Java Dockerfiles
    • Update core docker image to alpine 3.17
    • Update core to go 1.19
    • Update scripts to use kind 0.18 with Kubernetes 1.24
  • Bug fixes
    • TailCalls should have an infinite request deadline (#350)
    • Segregate primary and submap state in getall (#351)
  • Changed project CI from TravisCI to GitHub Actions

KAR 1.3.5 - 2022-08-05

  • New distributed debugger for KAR (#338, #340)

KAR 1.3.4 - 2022-07-05

  • Upgrade kind from 0.12.0 to 0.14.0 (#333)
  • Reenable cancellation as an option (#331)
  • Improve documentation for logging and metrics
  • Add documentation for Python SDK. (#325)
  • Tolerate transient failures to connect to Kafka and Redis during startup
  • Add metrics for redis request time and active/canceled reminders (#326)
  • Customize Python version. (#324)
  • Fix activate method call in Python SDK (#323)

KAR 1.3.3 - 2022-05-05

  • Encode service result when invoked from actor tail call (#316, #317)
  • Bug fix in actor scheduling for recovery from a blocked self-call (#318)
  • Improve debug logging in message processing layer of rpclib (#319)

KAR 1.3.2 - 2022-04-25

  • Implement basic tail call from Actor to Service (#313)
  • Bug fix in actor locking -- overly forgiving reentrancy bypass (#309)

KAR 1.3.1 - 2022-04-07

  • Enhancements to the Python SDK
    • Support for reentrancy (#288) (#294)
    • Support for async actor calls (#290) (#293)
    • Support for reminders (#298)
    • Support for tail calls (#296)
  • Enable simple NRU-based actor placement cache (#285)
  • Improvements to KAR deployment scripts
    • Add support for logging stack (#301)
    • Add support for metrics stack (#286) (#292)

KAR 1.3.0 - 2022-03-22

  • KAR 1.3.0 introduces several major enhancements to the programming model
    • Failure recovery ensures that a retry of a failed actor invocation will not be executed until after all synchronous calls made by the failed version of the task have completed.
    • Tail calls to the same actor instance retain the actor lock by default.
    • Each actor's queue of incoming messages is now always processed in order.
  • There is a new Python SDK.
  • The legacy transport layer that predated pkg/rpc was removed.

KAR 1.2.3 - 2022-02-28

  • JavaSDK: fix @Produces annotation on Service.tell* routes in OpenLiberty sidecar (#254)

KAR 1.2.2 - 2022-02-18

  • Updated npm and maven packages to resolve CVEs (various)
  • Update Kafka version to 2.8.1 (#240)
  • Bump Quarkus from 2.2.3.Final to 2.4.2.Final (#232)
  • Improvements in Java SDKs for getReminders (#238, #245, #246, #247)
  • Improve log message for dropped tells (#249)
  • Fix for default replication factor for Event Streams (#237)
  • Add unit testing infrastructure and RPC library testing (#222)

KAR 1.2.1 - 2021-11-23

  • Use rpclib by default (#218)
  • Add ability to control topic-level message retention (#216, #217)

KAR 1.2.0 - 2021-11-09

  • Add tail call support to rpclib, SDKs, and use in actors-dp-* examples
  • Document deploying on k3d (supplanting k3s)
  • Improve microbenchmarks
  • Implement a cache of actor placement info for rpclib

KAR 1.1.0 - 2021-10-08

  • Implement an alternative Kafka-only RPC layer
    • Port KAR runtime to new rpclib APIs
      • Port KAR to new RPC library abstractions (#170)
      • Promote internal/store to pkg/store (#171)
      • Add alternative store.CAS implementation that returns value instead of Boolean (#173)
    • New Kafka-only RPC library
      • Initial import of rpclib (#174)
      • Subsequent fixes (#177), (#178), (#179), (#180), (#184), (#185), (#186)
  • Adding a transactional framework in KAR (#167)
  • Upgrade from Open Liberty 20.0.0.9 to 21.0.0.7 (#181)
  • Upgrade from Quarkus 1.1.13 to 2.2.3 (#176)
  • Upgrade from kafka 2.7.0 to 2.7.1 (#182)
  • Fix bug introduced in 1.0.9 in redis retry logic (#172)

KAR 1.0.9 - 2021-09-10

  • Implement a Reactive Java SDK using Quarkus
  • Add a retry loop around failed redis connection attempts (#163)
  • Also allow controlling sidecar ports via envvar (#153)
  • Move from alpine 3.11 to 3.14 for sidecar/webhook images (#151)
  • Fixup kafka-bench and re-enable building it. (#150)

KAR 1.0.8 - 2021-08-13

  • Upgrade to zookeeper 3.6 and kafka 2.7 (#146)
  • Upgrade to use Redis 6 (#145)
  • Implement cancellation of actor calls from dead sidecars (#144)

KAR 1.0.7 - 2021-08-09

  • Simplify Java SDK initialization (#139)

KAR 1.0.6 - 2021-07-30

  • Restructure of Java SDK internals and new maven artifact names
  • Add Prometheus metrics endpoint to sidecar

KAR 1.0.5 - 2021-07-22

  • Use factory to create JsonObjectBuilder and JsonArrayBuilder instances (#126)
  • Update to kind 0.11.1 (#125)
  • Rationalize concurrency controls for Java actor runtime (#123)

KAR 1.0.4 - 2021-06-08

  • Support for general multi-element Actor state updates (#117)
  • Optimize submap operations by using HSCAN (#115, #114, #112)
  • Default to Kubernetes 1.20 on kind (#110)
  • Ignore docker network connect error (#109)
  • Always add docker registry to kind network (#107)
  • Allow millisecond granularity periods for reminders (#105)

KAR 1.0.3 - 2021-04-14

  • Support for persistent volumes and zookeeper/kafka replication (#95)
  • Improve naming and documentation of timeout kar arguments (#82)
  • Java SDK configuration cleanups (#81)
  • Implement infinite service/actor timeout in sidecar (#79)
  • Truncate large backtraces to avoid exceeding Kafka message size (#78)

KAR 1.0.2 - 2021-03-30

  • support for deploying on OpenShift 4.x (#73)
  • upgrade to zookeeper 3.5 and kafka 2.6

KAR 1.0.1 - 2021-02-22

  • Add testcases for Java timeout scenario (#61, #62)
  • Java SDK: infinite default timeout (#59)

KAR 1.0.0 - 2021-02-12

First stable release