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If a thread blocked waiting on a connection pool is interrupted, it's possible for the connection to become leaked if the pool then completes the future from its side. This commit prevents that from happening by intercepting the interrupt and attempting to cancel the lease future. If that is unsuccessful, the connection is returned to the upper, and the thread is reinterrupted. Adresses #6786
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dagnir
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Mar 31, 2026
| @Test | ||
| void leaseInterrupted_doesNotLeakConnections_probabilistic() throws IOException, InterruptedException, ParseException { | ||
| wm.stubFor(WireMock.get(WireMock.anyUrl()).willReturn(WireMock.aResponse().withStatus(204))); | ||
| int rounds = 16; |
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With the PoolingHttpClientConnectionManagerBuilder, this fails within the first 3 iterations typically
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Motivation and Context
If a thread blocked waiting on a connection pool is interrupted, it's possible for the connection to become leaked if the pool then completes the future from its side.
This commit prevents that from happening by intercepting the interrupt and attempting to cancel the lease future. If that is unsuccessful, the connection is returned to the upper, and the thread is reinterrupted.
Adresses #6786
Modifications
Testing
Screenshots (if appropriate)
Types of changes
Checklist
mvn installsucceedsscripts/new-changescript and following the instructions. Commit the new file created by the script in.changes/next-releasewith your changes.License