[condor-users] Problems Re-adding a Condor Client

[Jess Cannata <jac67@xxxxxxxxxxxxxx>]

I have a 48-node Linux cluster running Condor. One of the node's hard 
drive crashed and was rebuilt. I have tried, unsuccessfully, to get 
Condor running again on the rebuilt node (it worked fine before the node 
crashed, and it works fine for the other 47 machines). The Condor base 
install is on /home/condor, which is shared across all of the nodes via 
NFS. The condor user exists on the new node. All I did was create 
/var/lock/condor/InstanceLock with the proper permissions and make it so 
the Condor services would start.

The Condor services start on the rebuilt node without any errors, but 
the Condor master never sees the new node (condor_status doesn't report 
the rebuilt node). It is as if no information were being sent from the 
rebuilt node to the master node. However, I know that the network 
communication is fine (the new node is loading the Condor services off 
the NFS mount).

The following services are running on the rebuilt node:

condor_master
condor_startd
condor_schedd

and their log files show no errors.

Has anyone seen this problem before? How exactly do the Condor clients 
communicate to the master node? Is it via a specific TCP/UDP port? I've 
disabled IPTABLES on both the master and the client to no avail. The 
weird thing is that all of the other clients are showing up.

Any help would be appreciated.

Jess Cannata
Advanced Research Computing
Georgetown University

Condor Support Information:
http://www.cs.wisc.edu/condor/condor-support/
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