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Oort synchronization issues, part II. #795
we were discussing OortObject sync issues (#667) some two years ago. It seemed to be fine since you fixed some loopholes with that particular installation. Now we're having two more installations active (one 4 node oort cluster, one 2 node oort cluster) and unfortunately we're again seeing the NPE described in that ticket and the oort cluster not being able to resync properly after network issues. We're seeing it in both installations (totally different environments); about once, twice every month. We have no clue what the physical root cause is, maybe some router issues between the nodes (not under our control). As the live logs are not helpful, we were struggling for a while to reproduce a test case. We came back to the idea of ticket #667 (halfway disconnect) and now we can simulate a condition with the same symptoms reliably by
Things to note:
We reproduced it with cometd 3.1.5 and jetty 9.2.26.v20180806, upgrading to cometd 4.0.0 is planned but comes with some bigger efforts on our side. Would you expect these issues are not happening on 4.0.0?