Metacat

no need to call saveLocally explicitly since loading from the shared store triggers that behavior locally because of the configured listeners.
use an iterator over the shared identifiers in case this set is constantly changing.

make only one DB call to look up local pids - no need to do a pstmt for every single shared pid.

on init (start up) launch a synchronization thread that ensures all shared identifier entries have a corresponding local System Metadata entry.

fix NPE (logMetacat object was not initialized) that was occurring during store()

stack trace the HZ put exception during CN-CN replication

additional debugging statements for CONCURRENT_MAP_PUT error during CN-CN replication.

Don't set the replication status to failed for an object when it is called by a public user. Just throw the NotAuthorized exception. This prevents this node from being de-prioritized because of public calls to the method.

share the same dbConnection when inserting and then updating SystemMetadata objects in the backing store.
any errors encountered during the update will rollback the entire transaction and the SM record will not exist, even in part.

Do not loadAllKeys() for SystemMetadataMap when Metacat first starts up. hzIdentifiers will be populated with a simple SQL statement rather than the serial loading of every single SystemMetadata object. It will remain in synch using the usual entryXXX() methods as before....

include pidFilter handling - only matches the complete pid. Issues a warning in the Metacat logs when pidFilter cannot be applied but allows the call to getLogs() to return as though there was no pidFilter given.
https://redmine.dataone.org/issues/2798