dns: reinitialize c-ares channel on ARES_ETIMEOUT#41718
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Request (pr/41718/main@6289324)
6289324 
#41718 merge main@ca1200b
dns: reinitialize c-ares channel on ARES_ETIMEOUT
Commit Message: dns: reinitialize c-ares channel on ARES_ETIMEOUT
Additional Description::
Add ARES_ETIMEOUT to the list of error conditions that trigger c-ares channel reinitialization. When DNS queries timeout, the c-ares channel can enter a broken state where UDP sockets become unusable and subsequent queries continue to fail. This is similar to ARES_ECONNREFUSED and other connection errors that already trigger reinitialization.Risk Level: Low
Testing: Updated existing
DnsImplZeroTimeoutTest::Timeouttest to verify channel reinitialization after timeout.Docs Changes: N/A
Release Notes: Added to changelogs/current.yaml
Platform Specific Features: N/A
Environment
Request variables
| Key | Value |
|---|---|
| ref | f3ecfd0 |
| sha | 6289324 |
| pr | 41718 |
| base-sha | ca1200b |
| actor | @Najji |
| message | dns: reinitialize c-ares channel on ARES_ETIMEOUT... |
| started | 1761798172.613801 |
| target-branch | main |
| trusted | false |
Build image
Container image/s (as used in this CI run)
| Key | Value |
|---|---|
| default | docker.io/envoyproxy/envoy-build-ubuntu:f4a881a1205e8e6db1a57162faf3df7aed88eae8 |
| mobile | docker.io/envoyproxy/envoy-build-ubuntu:mobile-f4a881a1205e8e6db1a57162faf3df7aed88eae8 |
Version
Envoy version (as used in this CI run)
| Key | Value |
|---|---|
| major | 1 |
| minor | 37 |
| patch | 0 |
| dev | true |
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