[jcifs] NtlmHttpFilter - Uncaught SmbException

[Michael B Allen]

On Sat, 26 Jun 2004 06:13:30 -0400
Eric <eglass1 at comcast.net> wrote:

> If you've got jcifs.http.loadBalance=true (or unset, as it defaults to 
> true), my guess would be that one of the controllers is down; that would 
> account for the intermittent failures.

Yes, that's definately a possibility. Or limit the domain
controllers used to the top N in the list returned by WINS with the
jcifs.netbios.lookupRespLimit property. For details Bill should read:

  http://jcifs.samba.org/src/docs/ntlmhttpauth.html#props

>  You could try the below; I think 
> this would enumerate the domain controllers and obtain challenges from 
> all of them (I say think because I haven't tested this):

This will only work if you set jcifs.netbios.cachePolicy = 0 in
which case a different domain controller to be returned with each call
to getByName [1].

Mike

[1] although it will also make other operations quite slow as
WINS will be queried every time so I don't recommend using this setting
for other ordinary apps.


>      public static void main(String[] args) throws Exception {
>          char[] hex = "0123456789abcdef".toCharArray();
>          String domain = args[0];
>          Properties servers = new Properties();
>          for (int i = 0; i < 100; i++) {
>              UniAddress dc = new UniAddress(
>                      NbtAddress.getByName(domain, 0x1c, null));
>              try {
>                  byte[] challenge = SmbSession.getChallenge(dc);
>                  char[] hexChallenge = new char[16];
>                  for (int j = 0, k = 0; j < 8; j++) {
>                      hexChallenge[k++] = hex[(challenge[j] >> 4) & 0x0f];
>                      hexChallenge[k++] = hex[challenge[j] & 0x0f];
>                  }
>                  servers.setProperty(dc.toString(),
>                          new String(hexChallenge));
>              } catch (Exception ex) {
>                  System.out.println("Unable to contact " + dc);
>                  ex.printStackTrace();
>              }
>          }
>          servers.list(System.out);
>      }

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