Package: postgrey
Version: 1.21-1
Severity: normal
Lately my system has noticed runaway postgrey processes. The symptoms
are that on startup, the lone postgrey process consumes 80-95% of the
CPU. Strace ends with the following:
open("/var/lib/postgrey/__db.001", O_RDWR|O_LARGEFILE) = 6
fcntl64(6, F_SETFD, FD_CLOEXEC) = 0
mmap2(NULL, 16384, PROT_READ|PROT_WRITE, MAP_SHARED, 6, 0) = 0x4056e000
close(6) = 0
When I ran the strace of postgrey as above, but with --dbdir=/tmp/ it
started just fine. Moving all files but the postgrey.db out of
/var/lib/postgrey also solves the problem.
What appears to have happened is that an emergency reboot caused some of
the ancillary database files (the log or the __db.00? files) to become
corrupted in some maner that confused postgrey on startup.
A friend of mine noticed that he used to see this behavior in slapd
(which is not in Perl) suggesting that this was a berkeleydb problem.
Poking in his slapd init scripts he found the following:
12:14 <npmr> i noticed that as of sarge, the openldap initscript runs
db4.2-recover before starting the daeon
12:15 <npmr> looks like there's a try_fix_db bash function in there
12:15 <npmr> about a page of code
12:15 <npmr> very tidy looking
12:15 <npmr> and then this in the start) clause:
12:15 <npmr> if [ "$TRY_BDB_RECOVERY" = "yes" ]; then
12:15 <npmr> try_fix_db
12:15 <npmr> fi
It may be helpful to try this technique in postgrey's init scripts.
-- System Information:
Debian Release: 3.1
Architecture: i386 (i686)
Kernel: Linux 2.6.12.3-linode14
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Versions of packages postgrey depends on:
ii debconf 1.4.30.13 Debian configuration management sy
ii libberkeleydb-perl 0.26-3 use Berkeley DB 4 databases from P
ii libnet-dns-perl 0.48-1 Perform DNS queries from a Perl sc
ii libnet-server-perl 0.87-3 An extensible, general perl server
ii perl 5.8.4-8 Larry Wall's Practical Extraction
ii ucf 1.17 Update Configuration File: preserv
-- debconf information:
postgrey/1.13-5_move-db:
postgrey/1.14-1_lookup-by-subnet:
postgrey/1.13-5_old-config:
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