Xiangyi Zhu created HDFS-16045:
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Summary: FileSystem.CACHE memory leak
Key: HDFS-16045
URL: https://issues.apache.org/jira/browse/HDFS-16045
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs
Affects Versions: 3.4.0
Reporter: Xiangyi Zhu
{code:java}
FileSystem get(final URI uri, final Configuration conf,
final String user){code}
When the client turns on the cache and uses the above API to specify the user
to create a Filesystem instance, the cache will be invalid.
The specified user creates a new UGI every time he creates a Filesystem
instance, and cache compares it according to UGI.
{code:java}
public int hashCode() {
return (scheme + authority).hashCode() + ugi.hashCode() + (int)unique;
}{code}
Whether you can use username to replace UGI to make a comparison, and whether
there are other risks.
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