Chris Nauroth created HDFS-5211:
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Summary: Race condition between DistributedFileSystem#close and
FileSystem#close can cause return of a closed DistributedFileSystem instance
from the FileSystem cache.
Key: HDFS-5211
URL: https://issues.apache.org/jira/browse/HDFS-5211
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client
Affects Versions: 1.2.1
Reporter: Chris Nauroth
{{DistributedFileSystem#close}} closes the underlying {{DFSClient}} before the
superclass call to {{FileSystem#close}}, which removes the instance from the
cache. This leaves a small window during which another thread can call
{{FileSystem#get}} and receive the closed instance from the cache.
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