Underneath a Variable/NetcdfFile is (usually) a java.io.RandomAccessFile object, which is not thread-safe, because it keeps the state of the file position. So even if all you want to do is read data in multiple threads, you need to synchronize, typically on the NetcdFile object. Alternatively, open a new NetcdfFile for each thread. The Threads Data Server (TDS) uses a cache of open NetcdfFile files by using the NetcdfDataset.acquireFile() method, which allows stateless handling of data requests minimizing file opening and closing..
This document is maintained by John Caron and was last updated on Sep 15, 2008
