| Package | Description | 
|---|---|
| com.datastax.driver.core.exceptions | Exceptions thrown by the DataStax Java driver for Cassandra. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AlreadyExistsExceptionException thrown when a query attempts to create a keyspace or table that already exists. | 
| class  | AuthenticationExceptionIndicates an error during the authentication phase while connecting to a node. | 
| class  | BootstrappingExceptionIndicates that the contacted host was bootstrapping when it received a read query. | 
| class  | BusyConnectionExceptionIndicates that a connection has run out of stream IDs. | 
| class  | BusyPoolExceptionIndicates that a connection pool has run out of available connections. | 
| class  | ConnectionExceptionIndicates that a connection to a host has encountered a problem and that it should be closed. | 
| class  | FunctionExecutionExceptionError during the execution of a function. | 
| class  | InvalidConfigurationInQueryExceptionA specific invalid query exception that indicates that the query is invalid because of some
 configuration problem. | 
| class  | InvalidQueryExceptionIndicates a syntactically correct but invalid query. | 
| class  | OperationTimedOutExceptionThrown on a client-side timeout, i.e. | 
| class  | OverloadedExceptionIndicates that the contacted host reported itself being overloaded. | 
| class  | ProtocolErrorIndicates that the contacted host reported a protocol error. | 
| class  | QueryConsistencyExceptionA failure to reach the required consistency level during the execution of a query. | 
| class  | ReadFailureExceptionA non-timeout error during a read query. | 
| class  | ReadTimeoutExceptionA Cassandra timeout during a read query. | 
| class  | ServerErrorIndicates that the contacted host reported an internal error. | 
| class  | SyntaxErrorIndicates a syntax error in a query. | 
| class  | TransportExceptionA connection exception that has to do with the transport itself, i.e. | 
| class  | TruncateExceptionError during a truncation operation. | 
| class  | UnauthorizedExceptionIndicates that a query cannot be performed due to the authorization restrictions of the logged
 user. | 
| class  | UnavailableExceptionException thrown when the coordinator knows there is not enough replicas alive to perform a query
 with the requested consistency level. | 
| class  | UnpreparedExceptionIndicates that the contacted host replied with an UNPREPARED error code. | 
| class  | UnsupportedProtocolVersionExceptionIndicates that we've attempted to connect to a Cassandra node with a protocol version that it
 cannot handle (e.g., connecting to a C* 1.2 node with protocol version 2). | 
| class  | WriteFailureExceptionA non-timeout error during a write query. | 
| class  | WriteTimeoutExceptionA Cassandra timeout during a write query. | 
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