[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[LDM #RCA-822786]: Failover doesn't occur when primary feed goes down


> > I didn't see anything in the log file to indicate that the LDM on
> >Weather2 was ever requesting data-products of feedtype "NEXRAD3|WMO"
> >(which is the same as "IDS|DDPLUS|HRS|NNEXRAD") from
> >"idd.unidata.ucar.edu". Can you find a "Starting Up" message to that
> >effect in the earlier log files? The command
> >
> >>    fgrep 'Starting Up' `ls -tr ldmd.log*` | fgrep WMO | fgrep
> >idd.unidata.ucar.edu | tail
> >
> > should do it.
> I went through it this morning. You are right...and I have fixed that now.
> Also...
> > I did notice partially overlapping requests regarding the FNEXRAD feedtype. 
> > You should vet the LDM configuration-file regarding that feedtype. Feeds 
> > should be disjoint or identical: partial overlaps in the feedtype/pattern 
> > specification can result in missed data-products.
> Yep. I had put FNEXRAD in a request of a group of feeds, and then I
> put it later on down the file as a single request of that feed. I
> commented the latter out and restarted the LDM.
> > If you'll send me Weather2's LDM configuration-file I'll be happy to
> > take a look at it.
> I think I am good now...I'd rather you spend the time to figure out why
> the backup feed dies when it's supposed to fail over from time to time.
> And if there's anything I can do to help with that, please let me know!

Looking at the configuration-file supports the fail-over investigation. If 
there was no downstream LDM making the identical request for NEXRAD3|WMO 
data-products from idd.unidata.ucar.edu as was made to Weather3, then there was 
no process that could take-over when Weather 3 went offline.

Steve Emmerson

Ticket Details
Ticket ID: RCA-822786
Department: Support LDM
Priority: Normal
Status: Closed

NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.