| Package | Description | 
|---|---|
| com.hazelcast.core | Provides core API interfaces/classes. | 
| com.hazelcast.cp.exception | Contains exceptions that can be thrown by APIs of CP Subsystem | 
| com.hazelcast.crdt | This package contains the common classes for CRDT (conflict-free replicated
 data type) implementations based on the Hazelcast infrastructure. | 
| com.hazelcast.spi.exception | Contains exceptions for Hazelcast SPI. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | MemberLeftExceptionA  ExecutionExceptionthrown when a member left during an invocation or execution. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | CannotReplicateExceptionA  CPSubsystemExceptionwhich is thrown when an entry cannot be
 replicated, which can occur in one of the following cases:
 
 a member leaves the CP group
 CP group itself is terminated
 uncommitted entry count reaches to
 (seeRaftAlgorithmConfig.getUncommittedEntryCountToRejectNewAppends())
 a membership change is requested before an entry is committed
 on a term | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | TargetNotReplicaExceptionException that indicates that the receiver of a CRDT operation is not
 a CRDT replica. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | CallerNotMemberExceptionA  RetryableHazelcastExceptionthat indicates that an operation was sent by a machine which isn't member
 in the cluster when the operation is executed. | 
| class  | PartitionMigratingExceptionA  RetryableHazelcastExceptionthat is thrown when an operation is executed
 on a partition, but that partition is currently being moved around. | 
| class  | RetryableHazelcastExceptionA 'marker' exception that indicates that an operation can be retried. | 
| class  | RetryableIOExceptionA  IOExceptionindicating that there was a IO failure, but it can be retried. | 
| class  | TargetNotMemberExceptionA  RetryableHazelcastExceptionthat indicates operation was sent to a
 machine that isn't member of the cluster. | 
| class  | WrongTargetExceptionA  RetryableHazelcastExceptionindicating that an operation is executed on
 a wrong member. | 
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