Cyrus IMAP 3.8.6, Cyrus SASL 2.1.28, LMDB 0.9.35 on FreeBSD 14.4.
I'm using auxprop, not saslauthd. I recently switched my sasldb from
BDB to LMDB. Since then, every couple of days the IMAP server stops
authenticating clients until I restart it. Each attempt to connect
results in the following log messages on the server:
imaps[85496]: SASL unable to open MDB transaction: MDB_READERS_FULL:
Environment maxreaders limit reached
imaps[85496]: badlogin: redacted [redacted] plaintext (des) [SASL(-1):
generic failure: checkpass failed]
The database has 128 registered readers, which I assume is the limit:
# mdb_stat -rn /usr/local/etc/sasldb2 | wc -l
128
However, there are only three active imaps processes:
# fstat /usr/local/etc/sasldb2*
USER CMD PID FD MOUNT INUM MODE SZ|DV R/W NAME
cyrus imapd 79119 10 / 132265 -rw-r----- 32768 r
/usr/local/etc/sasldb2
cyrus imapd 79119 11 / 131427 -rw-r----- 8192 rw
/usr/local/etc/sasldb2-lock
cyrus imapd 79186 10 / 132265 -rw-r----- 32768 r
/usr/local/etc/sasldb2
cyrus imapd 79186 11 / 131427 -rw-r----- 8192 rw
/usr/local/etc/sasldb2-lock
cyrus imapd 79200 10 / 132265 -rw-r----- 32768 r
/usr/local/etc/sasldb2
cyrus imapd 79200 11 / 131427 -rw-r----- 8192 rw
/usr/local/etc/sasldb2-lock
# ps -xU cyrus
PID TT STAT TIME COMMAND
56124 - SsJ 0:01.48 /usr/local/cyrus/libexec/master -d
56127 - SJ 0:02.07 idled
56129 - IJ 0:00.01 notifyd
79119 - IJ 0:00.43 imapd: imaps: [redacted] des re.dac.ted Idle (imapd)
79186 - IJ 0:24.63 imapd: imaps: redacted [redacted] des re.dac.ted
(imapd)
79200 - IJ 0:00.37 imapd: imaps: redacted [redacted] des re.dac.ted
Idle (imapd)
85835 - SJ 0:00.02 lmtpd
All the readers match past or present imaps processes. There is no sign
in the logs to suggest that any of them met an abnormal fate.
Restarting imapd immediately clears up the issue:
# service imapd restart
Stopping cyrus_imapd.
Waiting for PIDS: 56124.
Starting cyrus_imapd.
# mdb_stat -rn /usr/local/etc/sasldb2 | wc -l
2
DES
--
Dag-Erling Smørgrav - [email protected]
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Cyrus: Info
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