Public bug reported:
On hirsute, on Jan 20, postfix stopped sending outgoing mails with the
error
Feb 22 23:35:18 pccross postfix/smtp[9582]: fatal: unknown service:
smtp/tcp
There were no changes in the system other than daily upgrades.
Strace shows that `smtp` process (while chrooted), after successful open
of the file in the queue, tried to use NSS, ran `fstat()` against
`/etc/nsswitch.conf`, that succeeded (presumably using the copy in the
/var/spool/postfix/etc/ directory), but there was no subsequent
`open()`, and the next syscall is `sendto()` of the error message to
syslog.
There was a big upgrade between the last successful and the first
unsuccessful email delivery, and among other things libc was updated
from 2.32-0ubuntu6 to 2.33-0ubuntu2. I suspect that there was some
change in the NSS in libc that resulted in the failure of
`getservbyname()`.
Is anybody else observing this problem?
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: postfix 3.5.6-1
ProcVersionSignature: Ubuntu 5.10.0-14.15-generic 5.10.11
Uname: Linux 5.10.0-14-generic x86_64
ApportVersion: 2.20.11-0ubuntu59
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: X-Cinnamon
Date: Tue Feb 23 00:02:13 2021
EtcMailname: pccross.average.org
Hostname: pccross
PostconfMydomain: localdomain
PostconfMyhostname: pccross.localdomain
PostconfMyorigin: /etc/mailname
ResolvConf:
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
search average.org
SourcePackage: postfix
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: postfix (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug hirsute hirsute-regression third-party-packages
** Description changed:
On hirsute, on Jan 20, postfix stopped sending outgoing mails with the
error
Feb 22 23:35:18 pccross postfix/smtp[9582]: fatal: unknown service:
smtp/tcp
There were no changes in the system other than daily upgrades.
Strace shows that `smtp` process (while chrooted), after successful open
of the file in the queue, tried to use NSS, ran `fstat()` against
`/etc/nsswitch.conf`, that succeeded (presumably using the copy in the
- /var/spool/postfix/etc/ directory), but did there was no subsequent
- read, and the next syscall is `sendto()` of the error message to syslog.
+ /var/spool/postfix/etc/ directory), but there was no subsequent
+ `open()`, and the next syscall is `sendto()` of the error message to
+ syslog.
There was a big upgrade between the last successful and the first
unsuccessful email delivery, and among other things libc was updated
from 2.32-0ubuntu6 to 2.33-0ubuntu2. I suspect that there was some
change in the NSS in libc that resulted in the failure of
`getservbyname()`.
Is anybody else observing this problem?
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: postfix 3.5.6-1
ProcVersionSignature: Ubuntu 5.10.0-14.15-generic 5.10.11
Uname: Linux 5.10.0-14-generic x86_64
ApportVersion: 2.20.11-0ubuntu59
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: X-Cinnamon
Date: Tue Feb 23 00:02:13 2021
EtcMailname: pccross.average.org
Hostname: pccross
PostconfMydomain: localdomain
PostconfMyhostname: pccross.localdomain
PostconfMyorigin: /etc/mailname
ResolvConf:
- # Dynamic resolv.conf(5) file for glibc resolver(3) generated by
resolvconf(8)
- # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
-
- nameserver 127.0.0.1
- search average.org
+ # Dynamic resolv.conf(5) file for glibc resolver(3) generated by
resolvconf(8)
+ # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
+
+ nameserver 127.0.0.1
+ search average.org
SourcePackage: postfix
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/bugs/1916541
Title:
smtp "fatal: unknown service: smtp/tcp", probably after libc upgrade
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