public void log_flush(DbLsn lsn) throws DbException;
The DbEnv.log_flush method guarantees that all log records whose DbLsn values are less than or equal to the lsn argument have been written to disk. If lsn is null, all records in the log are flushed.
The DbEnv.log_flush method throws an exception that encapsulates a non-zero error value on failure.
The DbEnv.log_flush method may fail and throw an exception encapsulating a non-zero error for the following conditions:
The DbEnv.log_flush method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbEnv.log_flush method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.
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