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The CN synchronization service
We noticed an out-of-sync state between the production CN and urn:node:ARCTIC
the other day and found the CN thought it was completely in sync when it wasn't. In this particular case, the CN had failed to pick up tens of System Metadata updates from urn:node:ARCTIC
we were expecting to see and the CN may have missed many more. I messaged @taojing2002 for help and we found that sync had crashed due to being OOM. Our fix was to set the last harvest timestamp back a day and allow processing to run. My immediate thoughts are:
We talked about possible next steps on our dev call this week and came up with:
cn-ucsb-1
.ARCTIC
, ESS-DIVE
, RW
)For now, @taojing2002 is going to look into this and coordinate with @datadavev and we can go from there.
[Note: This might on the wrong repo since I can't see our logs on cn-ucsb-1 to see what actually crashed. Feel free to move.]
The operator from RW member node reported some pids hadn't been harvested even though they were uploaded couple days ago. I grepped the harvest log file and didn't find any information. So we need to monitor the situation to see if this happens again.
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