liuguanghua created HDFS-17357:
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Summary: NioInetPeer.close() should close socket connection.
Key: HDFS-17357
URL: https://issues.apache.org/jira/browse/HDFS-17357
Project: Hadoop HDFS
Issue Type: Bug
Reporter: liuguanghua
NioInetPeer.close() now do not close socket connection.
In my environment，all data were stored with EC.
And I found 3w+ connections leakage in datanode . And I found many warn message
as blew.
2024-01-22 15:27:57,500 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
hostname:50010:DataXceiverServer
When any Exception is found in DataXceiverServer, it will execute clostStream.
IOUtils.closeStream(peer) -> Peer.close() -> NioInetPeer.close()
But NioInetPeer.close() is not invoked with close socket connection. And this
will lead to connection leakage.
Other subClass of Peer's close() is implemented with socket.close(). See
EncryptedPeer, DomainPeer, BasicInetPeer
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