Alexey Serbin created KUDU-3352:
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Summary: Malfunction in Sockaddr::HashCode() could lead to running
out of connections in a busy Kudu cluster
Key: KUDU-3352
URL: https://issues.apache.org/jira/browse/KUDU-3352
Project: Kudu
Issue Type: Bug
Components: client, master, tserver
Affects Versions: 1.15.0, 1.14.0, 1.13.0
Reporter: Alexey Serbin
Assignee: Alexey Serbin
Since the {{Sockaddr}} class has been updated to handle various address
families, an issue with uninitialized memory in the {{storage_.in.sin_zero}}
started affecting the behavior of the {{Sockaddr::HashCode()}} method.
As the result, {{ReactorThread::FindOrStartConnection()}} would create a new
connection to the specified remote even if a connection with the required
credentials policy had already been established. In a very busy Kudu cluster
that could lead to running out of connections, where an attempt to establish a
new connection would fail with {{EADDRNOTAVAIL}} error (Cannot assign requested
address).
Credit goes to [~wzhou] for detecting and troubleshooting the issue.
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