Nknd exit with Fatal error: sync blocks error: all workers failed

The node is working on Aliyun in BeiJing. It seems it is working just fine in the first two days but suddenly it crashed. Reading its log and it doesn’t seems my network is causing that problem. Why this happened and what should I do? By the way, it is not working after I restart the program.

Most likely you have lost all connections with your neighbors, i suggest you to recreate your wallet file and try again.

I don’t think recreating wallet is necessary. Typically restart can solve the problem