We are trying to run the Qpid C++ broker on Fedora 18, but when we increase
the number of connections to Qpid topics we get a tremendous number of
these messages in the log:
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
Jul 26 12:09:36 jackson qpidd[31823]: 2013-07-26 18:09:36 [System] error
Could not accept socket: Too many open files
(/builddir/build/BUILD/qpid-0.22/cpp/src/qpid/sys/posix/BSDSocket.cpp:214)
When I say we get a tremendous number of these messages in the log, I mean
over ten thousand per second. In the following example, 11690 within a
single second:
root@jackson:/var/log> grep "Too many open files" | grep '18:09:36'
messages | wc -l
11690
We see these messages when there are only 1071 open file handles for the
qpidd daemon according to lsof.
In trying to address the issue, we have increased, system wide, the maximum
number of open file handles per user to 65535, or 65k:
root@jackson:~> ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 128143
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 65535
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
To verify that the user running the qpid daemon is truly running with the
new increased open files limit:
qpidd@jackson:~> ulimit -n
65535
Here is line 214 in BSDSocket.cpp that is responsible for all the messages
in the log:
204 Socket* BSDSocket::accept() const
205 {
206 int afd = ::accept(fd, 0, 0);
207 if ( afd >= 0) {
208 BSDSocket* s = new BSDSocket(afd);
209 s->localname = localname;
210 return s;
211 }
212 else if (errno == EAGAIN)
213 return 0;
214 else throw QPID_POSIX_ERROR(errno);
215 }
It appears that increasing the maximum number of open file handles for the
qpid user has not solved the problem. It seems that others on the email
list have experienced this probem, but we haven't seen a solution. Any
ideas?
On Mon, Jun 17, 2013 at 9:07 AM, zhumin <zhum...@git.com.cn> wrote:
> I also meet it when i use SSL C++ client to connect qpid server.
>
>
>
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