Bug 1904153
| Summary: | glibc: Transaction ID collisions cause slow DNS lookups in getaddrinfo [rhel-8.3.0.z] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 8 | Reporter: | RHEL Program Management Team <pgm-rhel-tools> |
| Component: | glibc | Assignee: | Florian Weimer <fweimer> |
| Status: | CLOSED ERRATA | QA Contact: | qe-baseos-tools-bugs |
| Severity: | high | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 8.3 | CC: | alex.osadchyy, amcdermo, aos-bugs, ashankar, benh, brueckner, bugproxy, clnperez, codonell, dgilmore, dj, dslavens, egarver, fweimer, fwestpha, geneong, glibc-bugzilla, hannsj_uhl, igreen, mcermak, mkumatag, mkumatag, mnewsome, mrobson, pfrankli, prudo, rdossant, rstrode, sipoyare, skolosov, suchaudh, vmukhame, wvoesch |
| Target Milestone: | rc | Keywords: | Bugfix, Patch, Triaged, ZStream |
| Target Release: | --- | Flags: | pm-rhel:
mirror+
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| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | glibc-2.28-127.el8_3.1 | Doc Type: | Bug Fix |
| Doc Text: |
.The `glibc` DNS stub resolver correctly processes parallel queries with identical transaction IDs
Prior to this update, the DNS stub resolver in the GNU C library `glibc` did not process responses to parallel queries with identical transaction IDs correctly. Consequently, when the transaction IDs were equal, the second parallel response was never matched to a query, resulting in a timeout and retry.
With this update, the second parallel response is now recognized as valid. As a result, the `glibc` DNS stub resolver avoids excessive timeouts due to unrecognized responses.
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Story Points: | --- |
| Clone Of: | 1868106 | Environment: | |
| Last Closed: | 2021-02-16 14:36:33 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1868106 | ||
| Bug Blocks: | 1886394 | ||
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Comment 2
Florian Weimer
2020-12-11 14:52:07 UTC
Verified with resolv/tst-resolv-txnid-collision Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (glibc bug fix and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2021:0556 |