Metacat

Add a read timeout for the connection. See bug https://projects.ecoinformatics.org/ecoinfo/issues/6684:wq

Convert the v2 system metadata object to v1 in the getSystemMetadata method.

Use the log to the replace system.out.print.

The setObsoletedBy only handles PID.

The method setObsoletedBy only hanldes SID.

Added the code to handle put method in meta url. See bug https://projects.ecoinformatics.org/ecoinfo/issues/6666

Add the code to handle the PUT method for meta url. See https://projects.ecoinformatics.org/ecoinfo/issues/6666.

Add the code to get the head version.

Add the timestamp for the printing out the start and end of hazelcast synchronization.

Call the method lock.lock() immediately after getting the lock. Otherwise, if an exception happened between the two calls (in another word, lock.lock() was called), lock.unlock() can cause an issue:
Current thread is not owner of lock!
See https://redmine.dataone.org/issues/6836.