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From Albert Rossi:

After cranking up debugging on the FNAL stkendca06a xrootd endpoint, I think I see
why the use of SLAC as source (dCache destination) is failing.

We are experiencing a Null Pointer Exception (here's the tip of the stack trace):

Uncaught exception in thread xrootd-tpc-client-0
java.lang.NullPointerException: null
at
org.dcache.xrootd.plugins.authn.gsi.GSIClientAuthenticationHandler$InboundResponseBu
ckets.finalizeDHSessionKey(GSIClientAuthenticationHandler.java:155)
...

and this appears to be on the channel:

sendEndSessionRequest to griddev04.slac.stanford.edu:2094, channel 57eeff68, stream
13, session 472000008CE900005900000049200000.

This suggests that the bucket structure of the kXR_certreq step has been changed.
The bucket that seems to be coming up null is the kXR_puk ... i.e., the public key
parameters for the DH handshake.

I take it this is part of the protocol change?

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