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nextnano.cloud
Problems with HTCondor
Error: communication error
If you receive the following error when you type in condor_status
C:\Users\"<your user name>">condor_status Error: communication error CEDAR:6001:Failed to connect to <123.456.789.123>
you can check whether the computer associated with this IP address is your HTCondor computer using the following command.
nslookup 123.456.789.123
It is also a good idea to type in
nslookup
This will return the name of the Default Server that resolves DNS names.
If it is not the expected computer, you can open a Command Prompt as Administrator and type in ipconfig /flushdns to flush the DNS Resolver Cache.
C:\Users\"<your user name>">ipconfig /flushdns
If the DNS address cannot be resolved correctly it could be related to a VPN connection that has configured a different default server for Domain Name to IP address mapping. E.g. if your Windows Domain is called contoso.com (which is only visible within your own network and your own HTCondor pool) but your DNS is resolved to www.contoso.com (which might be outside your local HTCondor pool).
Error: ''condor_store_cred add'' failed with ''Operation failed. Make sure your ALLOW_WRITE setting include this host.''
Solution:
Edit condor_config file and add host, i.e. local computer name (here: nn-delta).
ALLOW_WRITE = $(CONDOR_HOST), $(IP_ADDRESS) ==> ALLOW_WRITE = $(CONDOR_HOST), $(IP_ADDRESS), nn-delta
Error? Check the Log files
If you encounter any strange errors, you can find some hints in the history or Log files generated by HTCondor. You can find them here:
C:\condor\spool
- history
C:\condor\log
- CollectorLog
- MasterLog
- MatchLog
- NegotiatorLog
- ProcLog
- SchedLog
- ShadowLog
- SharedPortLog
- StarterLog
- StartLog
More details can be found here: Logging in HTCondor
