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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