Detail
A node comes back with the ‘e’ (evade) flag set after an unclean shutdown or a crash in Strong Consistency.
Log output:
{NAMESPACE} setting partition version 'e' flagsAnswer
As part of a graceful shutdown the last task a node performs is to set a flag on the storage to indicate that the data there is trustworthy (all pending writes have flushed to disk). When a node starts up it looks for this flag and if it does not find it the node can infer that the shutdown was unclean and that, potentially, writes could have been lost. The node is then marked with the ‘e’ flag as the data it holds may not be fully consistent.