Function rejectCommand

src/server.cpp:4738–4748

Used when a command that is ready for execution needs to be rejected, due to * varios pre-execution checks. it returns the appropriate error to the client. * If there's a transaction is flags it as dirty, and if the command is EXEC, * it aborts the transaction. * Note: 'reply' is expected to end with \r\n */

 * it aborts the transaction.
 * Note: 'reply' is expected to end with \r\n */
void rejectCommand(client *c, robj *reply, int severity = ERR_CRITICAL) {
    flagTransaction(c);
    if (c->cmd) c->cmd->rejected_calls++;
    if (c->cmd && c->cmd->proc == execCommand) {
        execCommandAbort(c, szFromObj(reply));
    }
    else {
        /* using addReplyError* rather than addReply so that the error can be logged. */
        addReplyErrorObject(c, reply, severity);
    }
}

void lfenceCommand(client *c) {
    c->mvccCheckpoint = getMvccTstamp();