[THREDDS #OIV-218948]: caching netcdf variables in thredds

> But are there any debug messages for the event when it takes file handle
> from cache?

Yes. The class in question is FileCache:
https://github.com/Unidata/thredds/blob/5.0.0/cdm/src/main/java/ucar/nc2/util/cache/FileCache.java

The clearCache(), eject(), and cleanup() methods actually close the 
NetcdfFiles, which releases the underlying file handles.
Look for "cacheLog" to see the messages that are logged.

> Moreover why it locks the file handle as it should open file in
> read mode only. It should lock only if it is writing the file.

I had the same thought. As I did not write any of the code I can only 
speculate. Maybe FileCache is used somewhere to manage writeable files?

-Christian

Ticket Details
===================
Ticket ID: OIV-218948
Department: Support THREDDS
Priority: High
Status: Closed
===================
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