Hazelcast IMDG Standard Support has expired. Extended support for version 4.1 ends in April 2024. Extended support for version 4.2 ends in September 2024.

We recommend that you try Hazelcast Platform.

In Hazelcast Platform, we’ve combined the in-memory storage of IMDG with the stream processing power of Jet. Find out more in our Platform documentation.

The following topics are a good place to start:

Dealing with Network Partitions

Hazelcast handles network partitions using the following solutions:

  • Split-brain protection: Split-brain protection could be used when consistency is the major concern on a network partitioning. It requires a minimum cluster size to keep a particular data structure available. When cluster size is below the defined split-brain protection size, then subsequent operations are rejected with a SplitBrainProtectionException. See the Split-Brain Protection section.

  • Split-brain recovery (merge policies): Split-brain recovery is to make data structures available and operational on both sides of a network partition, and merge their data once the network partitioning problem is resolved. See the Split-Brain Recovery section.

Split-brain recovery is also supported for the data structures whose in-memory format is NATIVE.