Chris Nauroth created HADOOP-13726:
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Summary: Enforce that FileSystem initializes only a single
instance of the requested FileSystem.
Key: HADOOP-13726
URL: https://issues.apache.org/jira/browse/HADOOP-13726
Project: Hadoop Common
Issue Type: Improvement
Components: fs
Reporter: Chris Nauroth
The {{FileSystem}} cache is intended to guarantee reuse of instances by
multiple call sites or multiple threads. The current implementation does
provide this guarantee, but there is a brief race condition window during which
multiple threads could perform redundant initialization. If the file system
implementation has expensive initialization logic, then this is wasteful. This
issue proposes to eliminate that race condition and guarantee initialization of
only a single instance.
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