https://bz.apache.org/bugzilla/show_bug.cgi?id=66502
Bug ID: 66502
Summary: tomcat-jdbc ConnectionPool.returnConnection() accept
closed connections
Product: Tomcat 10
Version: 10.1.6
Hardware: PC
OS: Mac OS X 10.1
Status: NEW
Severity: normal
Priority: P2
Component: Util
Assignee: dev@tomcat.apache.org
Reporter: z...@godaddy.com
Target Milestone: ------
When a connection is checked out from pool, it could be forcefully closed by
the server. The connection is then returned to the connection pool, available
for more borrow/returns; the same broken connection causes plurals of failures
for the application, until `validationInterval` is reached when there's a
chance to evict the connection.
Proposal: PooledConnection.validate(VALIDATE_RETURN) checks underlying
`connection.isClosed()` unconditionally. This should be an inexpensive check.
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