Kousuke Saruta created HADOOP-10792:
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Summary: Add FileSystem#closeIfNotReferred method
Key: HADOOP-10792
URL: https://issues.apache.org/jira/browse/HADOOP-10792
Project: Hadoop Common
Issue Type: Improvement
Components: fs
Reporter: Kousuke Saruta
FileSystem#close closes FileSystem even if the same instance of FileSystem is
referred by someone.
For instance, a library using FileSystem calls FileSystem.get, and a program
using the library calls FileSystem.get, both of instances of FileSystem is
same.
When the library and the program is implemented as different threads and one
calls FileSystem.close, another fails most of operations of FileSystem.
So, we need the method like cloesIfNotReferred, which closes FileSystem only if
a instance of FileSystem is not referred by anyone.
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