| Package | Description | 
|---|---|
| com.hazelcast.mapreduce | This package contains the MapReduce API definition for Hazelcast. All map reduce operations running in a distributed manner inside the active Hazelcast cluster. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | LifecycleMapperAdapter<KeyIn,ValueIn,KeyOut,ValueOut>Deprecated. 
 MapReduce is deprecated and will be removed in 4.0.
 For map aggregations, you can use  Aggregatoron IMap.
 For general data processing, it is superseded by Hazelcast Jet. | 
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