Try next DFS referral if fail to find link referral - #316
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While getReferralTransport() deals with the use case of a failed connection to the referred server, it does not address a successful connection that subsequently fails while calling getReferral. There are probably a number of ways this could occur, but in our case one set of servers where failing with SmbUnsupportedOperationExceptions during getReferral, due to misconfig. In the prior logic, this would cause an immediate failure to find the link, rather than trying the other referrals received from the getRootReferral. The new logic follows the pattern used in getReferralTransport to loop until we either succeed and break out or follow the referrals all the way back to the first option.
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While
getReferralTransport()deals with the use case of a failed connection to the referred server, it does not address a successful connection that subsequently fails while callinggetReferral().There are probably a number of ways this could occur, but in our case one set of servers where failing with
SmbUnsupportedOperationExceptions duringgetReferral(), due to misconfig on the namespace server. In the prior logic, this would cause an immediate failure to find the link, rather than trying the other referrals received from thegetRootReferral().The new logic follows the pattern used in
getReferralTransport()to loop until we either succeed and break out or follow the referrals all the way back to the first option.