[jira] [Created] (HDFS-15307) Update description of "dfs.client.socketcache.*" properties to not have mention of short-circuits

["Andrey Elenskiy (Jira)" <ji...@apache.org>]

Andrey Elenskiy created HDFS-15307:
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             Summary: Update description of "dfs.client.socketcache.*" properties to not have mention of short-circuits
                 Key: HDFS-15307
                 URL: https://issues.apache.org/jira/browse/HDFS-15307
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: caching, dfsclient
    Affects Versions: 3.1.3
         Environment: Hadoop 3.1.3
            Reporter: Andrey Elenskiy


Both `dfs.client.socketcache.capacity` and `dfs.client.socketcache.expiryMsec` mention that cache is for short-circuit reads. That appears to be not the case as PeerCache is also used for caching TCP remote connections:

[https://github.com/apache/hadoop/blob/3f223bebfa6b382a762edcc518fcbae310ce22e5/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/client/impl/BlockReaderRemote.java#L312]

https://github.com/apache/hadoop/blob/3f223bebfa6b382a762edcc518fcbae310ce22e5/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/client/impl/BlockReaderFactory.java#L815



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