final Set<Throwable> getOrInitSeenExceptions() {
    /*
     * The initialization of seenExceptionsField has to be more complicated than we'd like. The
     * simple approach would be for each caller CAS it from null to a Set populated with its
     * exception. But there's another race: If the first thread fails with an exception and a second
     * thread immediately fails with the same exception:
     *

     * most common. This is the state information that would be retrieved from
     * WINS for example. Natrually it is not practical for every NbtAddress
     * to be populated will all state requiring a Node Status on every host
     * encountered. The below methods allow state to be populated when requested
     * in a lazy fashon.
     */

    void checkData(final CIFSContext tc) throws UnknownHostException {

    /**
     * Creates a new request to connect to the SAM service.
     *
     * @param server the server name to connect to
     * @param access the desired access rights
     * @param policyHandle the policy handle to be populated
     */
    public MsrpcSamrConnect2(final String server, final int access, final SamrPolicyHandle policyHandle) {
        super(server, access, policyHandle);
        this.ptype = 0;

    /**
     * Creates a new request to connect to the SAM service.
     *
     * @param server the server name to connect to
     * @param access the desired access rights
     * @param policyHandle the policy handle to be populated
     */
    public MsrpcSamrConnect4(final String server, final int access, final SamrPolicyHandle policyHandle) {
        super(server, 2, access, policyHandle);
        ptype = 0;

     *
     * @param handle the domain handle
     * @param access the desired access rights
     * @param rid the relative identifier of the alias
     * @param aliasHandle the alias handle to be populated
     */
    public MsrpcSamrOpenAlias(final SamrDomainHandle handle, final int access, final int rid, final SamrAliasHandle aliasHandle) {
        super(handle, access, rid, aliasHandle);
        ptype = 0;

     *
     * @param handle the SAM policy handle
     * @param access the desired access rights
     * @param sid the security identifier of the domain
     * @param domainHandle the domain handle to be populated
     */
    public MsrpcSamrOpenDomain(final SamrPolicyHandle handle, final int access, final rpc.sid_t sid, final SamrDomainHandle domainHandle) {
        super(handle, access, sid, domainHandle);
        this.ptype = 0;

    /**
     * Creates a new request to connect to the SAM service.
     *
     * @param server the server name to connect to
     * @param access the desired access rights
     * @param policyHandle the policy handle to be populated
     */
    public MsrpcSamrConnect4(final String server, final int access, final SamrPolicyHandle policyHandle) {
        super(server, 2, access, policyHandle);
        this.ptype = 0;

    /**
     * Creates a new request to connect to the SAM service.
     *
     * @param server the server name to connect to
     * @param access the desired access rights
     * @param policyHandle the policy handle to be populated
     */
    public MsrpcSamrConnect2(final String server, final int access, final SamrPolicyHandle policyHandle) {
        super(server, access, policyHandle);
        ptype = 0;

     *
     * @param handle the domain handle
     * @param access the desired access rights
     * @param rid the relative identifier of the alias
     * @param aliasHandle the alias handle to be populated
     */
    public MsrpcSamrOpenAlias(final SamrDomainHandle handle, final int access, final int rid, final SamrAliasHandle aliasHandle) {
        super(handle, access, rid, aliasHandle);
        this.ptype = 0;

    /**
     * Creates a new request to open an LSA policy handle.
     *
     * @param server the server name to connect to
     * @param access the desired access rights
     * @param policyHandle the policy handle to be populated
     */
    public MsrpcLsarOpenPolicy2(final String server, final int access, final LsaPolicyHandle policyHandle) {
        super(server, new lsarpc.LsarObjectAttributes(), access, policyHandle);