Multi-thread cyrus delayed forking of imapd processes after connecting to master listener
Michael Hieb
michael.hieb at celoso.net
Wed May 24 10:59:01 EDT 2017
I did try to change the service names. I posted that result to the group. It did not make a difference.
I am not a low-level programmer so maybe have the wrong idea here, but it seems locked on reading the imapd executable. Doesn't that suggest a system limit of either open files or open processes? I have tried to open up those limits as it was my first angle of investigation. What confuses me is that the problem goes away when I switch to a single-threaded Cyrus service listening on all ports simultaneously.
Any thoughts, suggestions welcome.
Michael
On May 24, 2017 10:42:30 PM GMT+08:00, Michael Ulitskiy <mulitskiy at acedsl.com> wrote:
>well, it tells us that it has to do with locking during connection
>accept.
>have you tried to use different service name per server as was
>suggested by
>others?
>
>Michael
>
>On Wednesday, May 24, 2017 12:00:58 PM Michael Hieb wrote:
>> I have had good success connecting to the right process and can
>> replicate the result. Here is what I found;
>>
>> MAILSERVER:~ # ps auwwx|grep imapd
>> cyrus 1738 0.0 0.0 119572 10140 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf -s
>> cyrus 1745 0.0 0.0 119580 9812 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain2.com.conf -s
>> cyrus 1749 0.0 0.0 119596 9856 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf
>> cyrus 1750 0.0 0.0 129424 11500 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1751 0.0 0.0 119696 9988 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain5.com.conf
>> cyrus 1752 0.0 0.0 119596 9816 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain4.com.conf
>> cyrus 1753 0.0 0.0 119604 9964 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf
>> cyrus 1754 0.0 0.0 119596 9652 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1755 0.0 0.0 119596 9800 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain5.com.conf
>> cyrus 1756 0.0 0.0 119604 10056 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain4.com.conf
>> cyrus 1757 0.0 0.0 129564 11724 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1758 0.0 0.0 119512 9896 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf -s
>> cyrus 1766 0.0 0.0 119588 9904 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf -s
>> cyrus 1767 0.0 0.0 119576 9804 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf -s
>> cyrus 1778 0.0 0.0 119480 9936 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf -s
>> cyrus 1786 0.0 0.0 119768 10144 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain5.com.conf
>> cyrus 1881 0.0 0.0 119808 10080 ? S 03:34 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1912 0.0 0.0 119688 9868 ? S 03:36 0:00
>imapd
>> -C /etc/imapd.domain2.com.conf
>> cyrus 1937 0.0 0.0 119784 10216 ? S 03:38 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf
>> cyrus 1947 0.0 0.0 125872 10660 ? S 03:39 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1993 0.0 0.0 119604 9808 ? S 03:42 0:00
>imapd
>> -C /etc/imapd.domain4.com.conf
>> cyrus 2078 0.0 0.0 117044 7628 ? S 03:48 0:00
>imapd
>> -C /etc/imapd.domain4.com.conf
>> root 2080 0.0 0.0 10548 1656 pts/2 S+ 03:48 0:00 grep
>> --color=auto imapd
>>
>> Then try to connect:
>>
>> user at somesystem:~> telnet imap.domain2.com 143
>> Trying 192.168.110.175...
>> Connected to imap.domain2.com.
>> Escape character is '^]'.
>>
>> Then mailserver is the same except one new process at the end:
>>
>> MAILSERVER:~ # ps auwwx|grep imapd
>> cyrus 1738 0.0 0.0 119572 10140 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf -s
>> cyrus 1745 0.0 0.0 119580 9812 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain2.com.conf -s
>> cyrus 1749 0.0 0.0 119596 9856 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf
>> cyrus 1750 0.0 0.0 129424 11500 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1751 0.0 0.0 119696 9988 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain5.com.conf
>> cyrus 1752 0.0 0.0 119596 9816 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain4.com.conf
>> cyrus 1753 0.0 0.0 119604 9964 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf
>> cyrus 1754 0.0 0.0 119596 9652 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1755 0.0 0.0 119596 9800 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain5.com.conf
>> cyrus 1756 0.0 0.0 119604 10056 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain4.com.conf
>> cyrus 1757 0.0 0.0 129564 11724 ? S 03:32 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1758 0.0 0.0 119512 9896 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf -s
>> cyrus 1766 0.0 0.0 119588 9904 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf -s
>> cyrus 1767 0.0 0.0 119576 9804 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf -s
>> cyrus 1778 0.0 0.0 119480 9936 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf -s
>> cyrus 1786 0.0 0.0 119768 10144 ? S 03:33 0:00
>imapd
>> -C /etc/imapd.domain5.com.conf
>> cyrus 1881 0.0 0.0 119808 10080 ? S 03:34 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1912 0.0 0.0 119688 9868 ? S 03:36 0:00
>imapd
>> -C /etc/imapd.domain2.com.conf
>> cyrus 1937 0.0 0.0 119784 10216 ? S 03:38 0:00
>imapd
>> -C /etc/imapd.domain3.com.conf
>> cyrus 1947 0.0 0.0 125872 10660 ? S 03:39 0:00
>imapd
>> -C /etc/imapd.domain1.com.conf
>> cyrus 1993 0.0 0.0 119604 9808 ? S 03:42 0:00
>imapd
>> -C /etc/imapd.domain4.com.conf
>> cyrus 2078 0.0 0.0 117044 7628 ? S 03:48 0:00
>imapd
>> -C /etc/imapd.domain4.com.conf
>> cyrus 2120 0.0 0.0 117044 7628 ? S 03:48 0:00
>imapd
>> -C /etc/imapd.domain2.com.conf
>> root 2122 0.0 0.0 10548 1656 pts/2 S+ 03:48 0:00 grep
>> --color=auto imapd
>>
>> MAILSERVER:~ # strace -p 2120
>> Process 2120 attached
>> fcntl(13, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}
>>
>> Process hangs, nothing happening... then about 45 seconds later (in
>this
>> case - time to wait varies each time I try this) it frees itself and
>> strace shows this:
>>
>> MAILSERVER:~ # strace -p 2120
>> Process 2120 attached
>> fcntl(13, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0})
>= 0
>> stat("/usr/lib/cyrus/bin/imapd", {st_mode=S_IFREG|0755,
>st_size=1758976,
>> ...}) = 0
>> accept(4, 0, NULL) = 14
>> fcntl(13, F_SETLKW, {type=F_UNLCK, whence=SEEK_SET, start=0, len=0})
>= 0
>> alarm(0) = 0
>> getpeername(14, {sa_family=AF_INET, sin_port=htons(43778),
>> sin_addr=inet_addr("192.168.110.27")}, [16]) = 0
>> getpeername(14, {sa_family=AF_INET, sin_port=htons(43778),
>> sin_addr=inet_addr("192.168.110.27")}, [16]) = 0
>> getsockname(14, {sa_family=AF_INET, sin_port=htons(143),
>> sin_addr=inet_addr("192.168.110.174")}, [16]) = 0
>> open("/etc/hosts.allow", O_RDONLY|O_CLOEXEC) = 15
>> fstat(15, {st_mode=S_IFREG|0644, st_size=2639, ...}) = 0
>> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
>0)
>> = 0x7ff634095000
>> read(15, "# /etc/hosts.allow\n# See 'man tc"..., 4096) = 2639
>> read(15, "", 4096) = 0
>> close(15) = 0
>> munmap(0x7ff634095000, 4096) = 0
>> open("/etc/hosts.deny", O_RDONLY|O_CLOEXEC) = 15
>> fstat(15, {st_mode=S_IFREG|0644, st_size=149, ...}) = 0
>> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
>0)
>> = 0x7ff634095000
>> read(15, "# /etc/hosts.deny\n# See 'man tcp"..., 4096) = 149
>> read(15, "", 4096) = 0
>> close(15) = 0
>> munmap(0x7ff634095000, 4096) = 0
>> write(3, "\2\0\0\0H\10\0\0", 8) = 8
>> sendto(6, "<31>May 24 03:56:21 imap[2120]: "..., 51, MSG_NOSIGNAL,
>NULL,
>> 0) = 51
>> dup2(14, 0) = 0
>> dup2(14, 1) = 1
>> dup2(14, 2) = 2
>> close(14) = 0
>> write(3, "\3\0\0\0H\10\0\0", 8) = 8
>> getpeername(0, {sa_family=AF_INET, sin_port=htons(43778),
>> sin_addr=inet_addr("192.168.110.27")}, [16]) = 0
>> socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 14
>> connect(14, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"},
>110) = 0
>> sendto(14, "\2\0\0\0\r\0\0\0\6\0\0\0hosts\0", 18, MSG_NOSIGNAL, NULL,
>0)
>> = 18
>> poll([{fd=14, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=14,
>> revents=POLLIN|POLLHUP}])
>> recvmsg(14, {msg_name(0)=NULL, msg_iov(2)=[{"hosts\0", 6},
>> {"\310O\3\0\0\0\0\0", 8}], msg_controllen=20, [{cmsg_len=20,
>> cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, [15]}],
>> msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 14
>> mmap(NULL, 217032, PROT_READ, MAP_SHARED, 15, 0) = 0x7ff634021000
>> close(15) = 0
>> close(14) = 0
>> getsockname(0, {sa_family=AF_INET, sin_port=htons(143),
>> sin_addr=inet_addr("192.168.110.174")}, [16]) = 0
>> open("/var/lib/imap/proc/2120", O_RDWR|O_CREAT|O_TRUNC, 0666) = 14
>> fstat(14, {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
>> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
>0)
>> = 0x7ff634095000
>> lseek(14, 0, SEEK_SET) = 0
>> write(14, "somehost.domain1.com [192.168.110.2"..., 35) = 35
>> lseek(14, 0, SEEK_CUR) = 35
>> ftruncate(14, 35) = 0
>> open("/var/lib/imap/msg/motd", O_RDONLY) = -1 ENOENT (No such file or
>> directory)
>> write(1, "* OK [CAPABILITY IMAP4rev1 LITER"..., 199) = 199
>> select(1, [0], NULL, NULL, {1800, 0}
>>
>> and telnet session shows this:
>>
>> user at somesystem:~> telnet imap.domain2.com 143
>> Trying 192.168.110.175...
>> Connected to imap.domain2.com.
>> Escape character is '^]'.
>> * OK [CAPABILITY IMAP4rev1 LITERAL+ ID ENABLE STARTTLS
>AUTH=GSS-SPNEGO
>> AUTH=GSSAPI AUTH=DIGEST-MD5 AUTH=CRAM-MD5 AUTH=LOGIN AUTH=PLAIN
>SASL-IR]
>> imap.domain2.com Cyrus IMAP v2.4.18 server ready
>>
>> Thereafter telnet to imap.domain2.com has immediate response and
>other
>> domains hang..
>>
>> I can replicate this at will.
>>
>> What does it mean?
>>
>> Michael
>>
>> On 05/23/2017 10:38 PM, Michael Ulitskiy wrote:
>> > you can use 'strace -p <pid>', specifying the pid of process you
>want to
>> > trace. you will have to "catch" the process that blocks. it may not
>be
>> > easy, but I have no other suggestions.
>> >
>> > On Tuesday, May 23, 2017 06:19:17 PM Michael Hieb wrote:
>> >> The SASL is cyrus-sasl 2.1.26-9.5. I believe it does use
>/dev/urandom.
>> >>
>> >> I am not sure how to run strace on the process that the Master
>listener
>> >> forks. Here is the strace run on the imapd process at a command
>prompt
>> >> (which is not quite the same as the master listener forking it to
>a port
>> >> where another process is waiting to connect to it).
>> >>
>> >> MAILSERVER:~ # strace /usr/lib/cyrus/bin/imapd -C
>> >> /etc/imapd.domain1.com.conf
>> >> execve("/usr/lib/cyrus/bin/imapd", ["/usr/lib/cyrus/bin/imapd",
>"-C",
>> >> "/etc/imapd.domain1.com.conf"], [/* 56 vars */]) = 0
>> >> brk(0) = 0x5573deaf5000
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb770c000
>> >> access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file
>or
>> >> directory)
>> >> open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
>> >> fstat(3, {st_mode=S_IFREG|0644, st_size=80522, ...}) = 0
>> >> mmap(NULL, 80522, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fdeb76f8000
>> >> close(3) = 0
>> >> open("/usr/lib64/libsasl2.so.3", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300N\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=118552, ...}) = 0
>> >> mmap(NULL, 2213800, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb72d0000
>> >> mprotect(0x7fdeb72ec000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb74eb000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b000) = 0x7fdeb74eb000
>> >> close(3) = 0
>> >> open("/usr/lib64/libkrb5.so.3", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200Y\2\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=855280, ...}) = 0
>> >> mmap(NULL, 2951008, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb6fff000
>> >> mprotect(0x7fdeb70c1000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb72c0000, 65536, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xc1000) = 0x7fdeb72c0000
>> >> close(3) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76f7000
>> >> open("/lib64/libcom_err.so.2", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\26\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=14760, ...}) = 0
>> >> mmap(NULL, 2109928, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb6dfb000
>> >> mprotect(0x7fdeb6dfe000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb6ffd000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fdeb6ffd000
>> >> close(3) = 0
>> >> open("/lib64/libssl.so.1.0.0", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >> "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0pr\1\0\0\0\0\0"...,
>832)
>> >> = 832
>> >> fstat(3, {st_mode=S_IFREG|0555, st_size=440632, ...}) = 0
>> >> mmap(NULL, 2535888, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb6b8f000
>> >> mprotect(0x7fdeb6bf0000, 2097152, PROT_NONE) = 0
>> >> mmap(0x7fdeb6df0000, 45056, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x61000) = 0x7fdeb6df0000
>> >> close(3) = 0
>> >> open("/lib64/libcrypto.so.1.0.0", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\313\6\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0555, st_size=2447744, ...}) = 0
>> >> mmap(NULL, 4559184, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb6735000
>> >> mprotect(0x7fdeb6962000, 2097152, PROT_NONE) = 0
>> >> mmap(0x7fdeb6b62000, 167936, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22d000) = 0x7fdeb6b62000
>> >> mmap(0x7fdeb6b8b000, 12624, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fdeb6b8b000
>> >> close(3) = 0
>> >> open("/usr/lib64/libdb-4.8.so", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >> "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 at X\2\0\0\0\0\0"...,
>832)
>> >> = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=1560248, ...}) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76f6000
>> >> mmap(NULL, 3655304, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb63b8000
>> >> mprotect(0x7fdeb6530000, 2097152, PROT_NONE) = 0
>> >> mmap(0x7fdeb6730000, 20480, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x178000) = 0x7fdeb6730000
>> >> close(3) = 0
>> >> open("/lib64/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >> "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P#\0\0\0\0\0\0"...,
>832)
>> >> = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=88216, ...}) = 0
>> >> mmap(NULL, 2183304, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb61a2000
>> >> mprotect(0x7fdeb61b7000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb63b6000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x7fdeb63b6000
>> >> close(3) = 0
>> >> open("/lib64/libwrap.so.0", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >> "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p8\0\0\0\0\0\0"...,
>832)
>> >> = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=40952, ...}) = 0
>> >> mmap(NULL, 2139520, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb5f97000
>> >> mprotect(0x7fdeb5fa0000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb619f000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0x7fdeb619f000
>> >> mmap(0x7fdeb61a1000, 1408, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fdeb61a1000
>> >> close(3) = 0
>> >> open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\10\2\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=1925280, ...}) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76f5000
>> >> mmap(NULL, 3811872, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb5bf4000
>> >> mprotect(0x7fdeb5d8e000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb5f8d000, 24576, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x199000) = 0x7fdeb5f8d000
>> >> mmap(0x7fdeb5f93000, 14880, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fdeb5f93000
>> >> close(3) = 0
>> >> open("/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240\r\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=18712, ...}) = 0
>> >> mmap(NULL, 2109680, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb59f0000
>> >> mprotect(0x7fdeb59f2000, 2097152, PROT_NONE) = 0
>> >> mmap(0x7fdeb5bf2000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fdeb5bf2000
>> >> close(3) = 0
>> >> open("/usr/lib64/libk5crypto.so.3", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340K\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=191424, ...}) = 0
>> >> mmap(NULL, 2290168, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb57c0000
>> >> mprotect(0x7fdeb57ed000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb59ec000, 12288, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2c000) = 0x7fdeb59ec000
>> >> mmap(0x7fdeb59ef000, 504, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fdeb59ef000
>> >> close(3) = 0
>> >> open("/usr/lib64/libkrb5support.so.0", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20:\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=52416, ...}) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76f4000
>> >> mmap(NULL, 2147816, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb55b3000
>> >> mprotect(0x7fdeb55bf000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb57be000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xb000) = 0x7fdeb57be000
>> >> close(3) = 0
>> >> open("/lib64/libkeyutils.so.1", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\26\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=14688, ...}) = 0
>> >> mmap(NULL, 2109704, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb53af000
>> >> mprotect(0x7fdeb53b2000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb55b1000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fdeb55b1000
>> >> close(3) = 0
>> >> open("/lib64/libresolv.so.2", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\2209\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=97152, ...}) = 0
>> >> mmap(NULL, 2189896, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb5198000
>> >> mprotect(0x7fdeb51ac000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb53ab000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13000) = 0x7fdeb53ab000
>> >> mmap(0x7fdeb53ad000, 6728, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fdeb53ad000
>> >> close(3) = 0
>> >> open("/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360r\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=135952, ...}) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76f3000
>> >> mmap(NULL, 2213008, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb4f7b000
>> >> mprotect(0x7fdeb4f93000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb5192000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x17000) = 0x7fdeb5192000
>> >> mmap(0x7fdeb5194000, 13456, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fdeb5194000
>> >> close(3) = 0
>> >> open("/lib64/libselinux.so.1", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >> "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0ps\0\0\0\0\0\0"...,
>832)
>> >> = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=147208, ...}) = 0
>> >> mmap(NULL, 2251056, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb4d55000
>> >> mprotect(0x7fdeb4d78000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb4f77000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22000) = 0x7fdeb4f77000
>> >> mmap(0x7fdeb4f79000, 6448, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fdeb4f79000
>> >> close(3) = 0
>> >> open("/usr/lib64/libpcre.so.1", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000\30\0\0\0\0\0\0"...,
>> >> 832) = 832
>> >> fstat(3, {st_mode=S_IFREG|0755, st_size=452976, ...}) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76f2000
>> >> mmap(NULL, 2548232, PROT_READ|PROT_EXEC,
>MAP_PRIVATE|MAP_DENYWRITE, 3,
>> >> 0) = 0x7fdeb4ae6000
>> >> mprotect(0x7fdeb4b54000, 2093056, PROT_NONE) = 0
>> >> mmap(0x7fdeb4d53000, 8192, PROT_READ|PROT_WRITE,
>> >> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6d000) = 0x7fdeb4d53000
>> >> close(3) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76f1000
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76f0000
>> >> mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb76ee000
>> >> arch_prctl(ARCH_SET_FS, 0x7fdeb76ee840) = 0
>> >> mprotect(0x7fdeb5f8d000, 16384, PROT_READ) = 0
>> >> mprotect(0x7fdeb5192000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb4d53000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb5bf2000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb4f77000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb53ab000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb55b1000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb57be000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb59ec000, 8192, PROT_READ) = 0
>> >> mprotect(0x7fdeb619f000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb63b6000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb6730000, 8192, PROT_READ) = 0
>> >> mprotect(0x7fdeb6b62000, 110592, PROT_READ) = 0
>> >> mprotect(0x7fdeb6df0000, 16384, PROT_READ) = 0
>> >> mprotect(0x7fdeb6ffd000, 4096, PROT_READ) = 0
>> >> mprotect(0x7fdeb72c0000, 53248, PROT_READ) = 0
>> >> mprotect(0x7fdeb74eb000, 4096, PROT_READ) = 0
>> >> mprotect(0x5573dd954000, 8192, PROT_READ) = 0
>> >> mprotect(0x7fdeb770d000, 4096, PROT_READ) = 0
>> >> munmap(0x7fdeb76f8000, 80522) = 0
>> >> set_tid_address(0x7fdeb76eeb10) = 18042
>> >> set_robust_list(0x7fdeb76eeb20, 24) = 0
>> >> rt_sigaction(SIGRTMIN, {0x7fdeb4f81d80, [],
>SA_RESTORER|SA_SIGINFO,
>> >> 0x7fdeb4f8bb10}, NULL, 8) = 0
>> >> rt_sigaction(SIGRT_1, {0x7fdeb4f81e10, [],
>> >> SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7fdeb4f8bb10}, NULL, 8) = 0
>> >> rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
>> >> getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024,
>rlim_max=RLIM64_INFINITY}) =
>> >> 0
>> >> statfs("/sys/fs/selinux", 0x7ffe1b4e8b00) = -1 ENOENT (No such
>file or
>> >> directory)
>> >> statfs("/selinux", {f_type="EXT2_SUPER_MAGIC", f_bsize=4096,
>> >> f_blocks=474903111, f_bfree=452714842, f_bavail=452228240,
>> >> f_files=120627200, f_ffree=120300880, f_fsi\
>> >> d={352889743, -1913047647}, f_namelen=255, f_frsize=4096}) = 0
>> >> brk(0) = 0x5573deaf5000
>> >> brk(0x5573deb16000) = 0x5573deb16000
>> >> open("/proc/filesystems", O_RDONLY) = 3
>> >> fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb770b000
>> >> read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 297
>> >> read(3, "", 1024) = 0
>> >> close(3) = 0
>> >> munmap(0x7fdeb770b000, 4096) = 0
>> >> access("/etc/selinux/config", F_OK) = -1 ENOENT (No such file
>or
>> >> directory)
>> >> stat("/dev/urandom", {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9),
>...})
>> >> = 0 open("/dev/urandom", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3, "\355\207\254Q\253\17d\266\22x\324\257
>> >> \236\205H\327b\32\221nzmx\251\216D\257J\362\301\357"..., 60) = 60
>> >> close(3) = 0
>> >> open("/dev/urandom", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_CLOEXEC) = 3
>> >> fstat(3, {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9), ...}) = 0
>> >> poll([{fd=3, events=POLLIN}], 1, 10) = 1 ([{fd=3,
>revents=POLLIN}])
>> >> read(3,
>> >>
>"r\324\5\243C\224\n\222d\333\25\25\2738\7\ts\351\3759\265\207&\n\251}\316
>> >> \20 5\224v\17\253"..., 1024) = 1024
>> >> close(3) = 0
>> >> getuid() = 0
>> >> stat("/dev/urandom", {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9),
>...})
>> >> = 0 open("/dev/urandom", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>"\3323i\236\226J\353\241\201\213\20\30\201b<\371\5\246\234\230",
>> >> 20) = 20
>> >> close(3) = 0
>> >> stat("/dev/urandom", {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9),
>...})
>> >> = 0 open("/dev/urandom", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"u2V%3\367\276\251\202$\376_\1\365r`N^\5?\303H\330\3173i\335\247]A\222\37
>> >> 6". .., 256) = 256
>> >> close(3) = 0
>> >> stat("/dev/urandom", {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9),
>...})
>> >> = 0 open("/dev/urandom", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\333_\2\335]:\7\"\373s]\352\375\305\312t\244.@;\245\345\245^(\262d\350\2
>> >> 73[ \327-"..., 216) = 216
>> >> close(3) = 0
>> >> stat("/dev/urandom", {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9),
>...})
>> >> = 0 open("/dev/urandom", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3, "\207", 1) = 1
>> >> close(3) = 0
>> >> stat("/dev/urandom", {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9),
>...})
>> >> = 0 open("/dev/urandom", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3, "\332", 1) = 1
>> >> close(3) = 0
>> >> stat("/dev/urandom", {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9),
>...})
>> >> = 0 open("/dev/urandom", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"\22\335\242$\210`\376\376d\200\215m\213-\0162\r\257\206\335\nY\343\3376/
>> >> \22 4\352\360\312\336\360", 32) = 32
>> >> close(3) = 0
>> >> stat("/dev/urandom", {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9),
>...})
>> >> = 0 open("/dev/urandom", O_RDONLY|O_CLOEXEC) = 3
>> >> read(3,
>> >>
>"U\2\251M\21fm\345\334\215Q1(\253\1M!\270\226\212s&A\263}\351\16\271",
>> >> 28) = 28
>> >> close(3) = 0
>> >> futex(0x7fdeb5bf30a8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
>> >> open("/lib64/.libcrypto.so.1.0.0.hmac", O_RDONLY) = -1 ENOENT (No
>such
>> >> file or directory)
>> >> open("/proc/sys/crypto/fips_enabled", O_RDONLY) = -1 ENOENT (No
>such
>> >> file or directory)
>> >> access("/lib64/.libcrypto.so.1.0.0.hmac", F_OK) = -1 ENOENT (No
>such
>> >> file or directory)
>> >> open("/etc/localtime", O_RDONLY|O_CLOEXEC) = 3
>> >> fstat(3, {st_mode=S_IFREG|0644, st_size=127, ...}) = 0
>> >> fstat(3, {st_mode=S_IFREG|0644, st_size=127, ...}) = 0
>> >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
>-1, 0)
>> >> = 0x7fdeb770b000
>> >> read(3,
>> >> "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"...,
>4096)
>> >> = 127
>> >> lseek(3, -71, SEEK_CUR) = 56
>> >> read(3,
>> >> "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"...,
>4096) =
>> >> 71 close(3) = 0
>> >> munmap(0x7fdeb770b000, 4096) = 0
>> >> socket(PF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 3
>> >> connect(3, {sa_family=AF_LOCAL, sun_path="/dev/log"}, 110) = 0
>> >> sendto(3, "<11>May 23 10:11:18 imapd: could"..., 67, MSG_NOSIGNAL,
>NULL,
>> >> 0) = 67
>> >> exit_group(70) = ?
>> >> +++ exited with 70 +++
>> >>
>> >> Michael
>> >>
>> >>
>> >> On 05/19/2017 05:55 PM, Michael Ulitskiy wrote:
>> >>
>> >> Msg # 57050 Previous in Sequence
>> >>
><http://asg.andrew.cmu.edu/archive/message.php?mailbox=archive.info-cyrus
>> >> &ms g=57374>
>> >>
>> >> Date Fri, 19 May 2017 11:32:38 -0400
>> >> To info-cyrus at lists.andrew.cmu.edu
>> >>
>> >> From Michael Ulitskiy <mulitskiy at acedsl.com>
>> >>
>> >> Reply-To: Michael Ulitskiy <mulitskiy at acedsl.com>
>> >> Subject Re: Multi-thread cyrus delayed forking of imapd processes
>after
>> >> connecting to master listener
>> >>
>> >> My immediate guess is it blocks at reading /dev/random.
>> >> strace should show you exactly where it blocks.
>> >> What version of SASL are you using? Newer versions have switched
>to
>> >> /dev/urandom AFAIK
>> >>
>> >> Michael
>> >>
>> >> On Friday, May 19, 2017 05:48:36 PM Michael Hieb wrote:
>> >>> Apologies for long post, most of it is configuration details.
>> >>>
>> >>> I have recently changed from a single threaded cyrus server in
>which
>> >>> multiple domains were overloaded on one listener as multiple
>virtual
>> >>> domains to a multiple threaded cyrus server in which multiple
>domains
>> >>> are listened for on separate ip addresses with separate
>configurations.
>> >>> The primary motivation was to have separate tls certificates for
>each
>> >>> domain. The problem is that I can connect to cyrus listener on
>all
>> >>> ip/ports for all domains, but while one of them will fork
>immediately
>> >>> and respond with a banner, the others will delay for a period of
>time
>> >>> from a few seconds to a minute or so before forking and
>responding with
>> >>> a banner. With the same setup, I change to a single threaded
>cyrus
>> >>> server to listen on all ip/ports then I get an immediate response
>on
>> >>> all, but of course I do not get the separate tls certificate or
>> >>> configuration. It is replicable that switching between the single
>> >>> threaded and multiple threaded configuration triggers the
>problem. I
>> >>> have searched the logs and the mail-lists and found nothing that
>seems
>> >>> related.
>> >>>
>> >>> Question: why does switching to multiple threaded cyrus server
>trigger
>> >>> delayed forking of imapd processes after connecting to master
>listener?
>> >>>
>> >>> On listener which responds immediately (as expected) I get this:
>> >>>
>> >>> user at somehost:~> telnet imap.domain1.com 143
>> >>> Trying 192.168.110.171...
>> >>> Connected to imap.domain1.com.
>> >>> Escape character is '^]'.
>> >>> * OK [CAPABILITY IMAP4rev1 LITERAL+ ID ENABLE STARTTLS
>AUTH=GSS-SPNEGO
>> >>> AUTH=GSSAPI AUTH=DIGEST-MD5 AUTH=CRAM-MD5 AUTH=LOGIN AUTH=PLAIN
>SASL-IR]
>> >>> imap.domain1.com Cyrus IMAP v2.4.18 server ready
>> >>>
>> >>> On listener with delay, I get this (and process hangs for many
>seconds
>> >>> or even a minute or two):
>> >>>
>> >>> user at somehost:~> telnet imap.domain2.com 143
>> >>> Trying 192.168.110.171...
>> >>> Connected to imap.domain2.com.
>> >>> Escape character is '^]'.
>> >>>
>> >>> The domain for which the listener responds and the one for which
>it
>> >>> delays seems to change and be random as far as I can tell.
>> >>>
>> >>> There is nothing
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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