Error Creating Network Socket No Buffer Space Available
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check your proposal. Ijust forgot to subscribe to updates of my proposal :( Messages python socket no buffer space available sorted by: [ date ] [ thread ] [ subject no buffer space available linux ] [ author ] Hello, since yesterday I'm running an entrynode on a virtual server. no buffer space available windows In my tor-logs I have a lot of these messages: [warn] Error creating network socket: No buffer space available I looked in the tor-wiki
Enobufs
(https://wiki.noreply.org/noreply/TheOnionRouter/TorFAQ#VServer) for a solution to this problem and took a look at my beancounters file: resource held maxheld barrier limit failcnt tcpsndbuf 4759936 4966208 16777216 25165824 0 tcprcvbuf 2095600 2536120 16777216 25165824 0 othersockbuf 14064 15384 8388608 15728640 0 numothersock 12 14 1792 1792 0 You see I have no problem with the limits which are described in the wiki-article. My problem is the value numtcpsock: resource held maxheld barrier limit failcnt numtcpsock 1792 1792 1792 1792 31240 Is Tor openeing more than 1792 Sockets for working? Or is there some problem with closing opened sockets? Because my node is now running 14 hours and in the first 8 hours this limit wasn't hit!? At the moment I'm therefor just relaying about 600-700 KB/s but I have a faster connection. Is there something which I can do against it? OS: Lenny Tor-Version: v0.2.0.34 (r18423) Previous message: Time Warner to charge for bandwidth usage Next message: Remember to check your proposal. Ijust forgot to subscribe to updates of my proposal :( Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the tor-talk mailing list
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers https://lists.torproject.org/pipermail/tor-talk/2009-April/000960.html are voted up and rise to the top “No buffer space available” on connect up vote 3 down vote favorite 2 I'm seeing the error message "No buffer space available" when processes call "connect" on a Linux virtual machine. I'm having trouble tracking down the cause - hopefully someone can help! I've checked the following: (1) File handles: cat /proc/sys/fs/file-nr 4672 0 810707 I'm reading this http://serverfault.com/questions/614453/no-buffer-space-available-on-connect as (allocated, unused, available) so this looks OK. (2) Sockets or TCP memory: cat /proc/sys/net/ipv4/tcp_mem 191889 255854 383778 cat /proc/net/sockstat sockets: used 579 TCP: inuse 169 orphan 0 tw 245 alloc 187 mem 5 UDP: inuse 31 mem 4 UDPLITE: inuse 0 RAW: inuse 0 FRAG: inuse 0 memory 0 Reading this as only a total of 579 sockets in use, page totals way below the maximum. There are lots of random TCP tweaks shown on Google - what I'm hoping for in an answer is (1) the resource I'm running out of, (2) how to determine the current value and (3) how to adjust the ceiling. Most of the pages I've found are missing everything except (3)! ** Update #1 ** On Flup's suggestion I did a systrace when it happens (using ping): socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4 connect(4, {sa_family=AF_INET, sin_port=htons(1025), sin_addr=inet_addr("10.140.0.65")}, 16) = -1 ENOBUFS (No buffer space available) ** Update #2 ** I don't know much about the linux kernel source, but I had a dig around and the only place in the connect() path I can see ENOBUFS is here: http://lxr.free-electrons.com/source/net/ipv4/af_inet.c?v=3.11#L353 This looks like it is allocating things in the kernel though with kmem_cach
Java, SQL, and other programming languages here. Search Forums Show Threads Show Posts Tag Search Advanced Search Unanswered Threads Find All Thanked Posts Go to Page... http://www.unix.com/programming/237027-how-avoid-no-buffer-space-available-c-socket.html unix and linux commands - unix shell scripting How to avoid 'No buffer https://www.ibm.com/developerworks/community/blogs/kevgrig/entry/no_buffer_space_available_maximum_connections_reached space available' on C socket? Programming Thread Tools Search this Thread Display Modes #1 09-30-2013 Zykl0n-B Users Awaiting Email Confirmation Join Date: Aug 2008 Last Activity: 27 July 2014, 5:18 PM EDT Posts: 43 Thanks: 0 Thanked 2 Times in 1 Post no buffer How to avoid 'No buffer space available' on C socket? Hello everybody, Years ago i left in stand-by a project of mine where the main program was supposed to send thousands ARP frames over the socket as fast as it could; but because of a programming issue i couldn't continue it. 2 days ago I decided to solve that issue. The thing is, when the program no buffer space sends bunch of data, eventually it gives the error "No buffer space available". I increased the buffer space size and it gave more sending time, but it gave the same error message later. My question is, Is there a way to send bunch of data, fast and avoiding this socket error? I don't know, by freeing it, cleaning it, etc. I'll appreciate any help, and please excuse my poor english. Thank you. Here's part of the code: Code: unsigned int buff; socklen_t optlen; optlen = sizeof(buff); ... struct sockaddr sockaddr; struct ifreq ifreq; memset(&ifreq, 0, sizeof(ifreq)); strcpy(sockaddr.sa_data, device); /* Transmitting device is set. */ strcpy(ifreq.ifr_name, device); if((sock = socket(AF_PACKET, SOCK_PACKET, htons(ETH_P_ALL))) < 0) { perror("socket()"); exit(-1); } if((setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, &ifreq, sizeof(ifreq))) < 0) { perror("setsockopt() cannot bind."); exit(-1); } if((resource=getsockopt(sock, SOL_SOCKET, SO_SNDBUF, &buff, &optlen))<0) { perror("getsockopt()"); } printf("Attempting to increase SNDBUF... "); buff = 2147483647; /*MAXIMUM*/ if((resource = setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &buff, sizeof(buff)))<0) { perror("setsockopt()"); } /*HERE'S THE TRANSMITTING PART*/ time_t startTime; startTime = time(NULL); while(time(NULL) - startTime < (time_assigned * 60)) { azimuth++; printf("%u\n", (unsigned int )azimuth); ret= sendto(sock, &arpmsg, sizeof(struct arpmsg),0, &sockaddr,sizeof(sockaddr)); if(ret < 0 && ret != ENOBUFS) { perro
(maximum connections reached?) kgibm 0600027VAP | | Visits (12151) Tweet This error can occur on Windows, particularly around socket operations. The error is translated from the Winsock error code WSAENOBUFS, 10055. The most common cause of this error is that Windows is configured for the default maximum of 5,000 in-use ports. This can be monitored by watching netstat or perfmon and can be changed with the MaxUserPort registry parameter. A more advanced cause for this error is non-paged pool exhaustion. The paged and nonpaged pools are areas of memory for certain Windows kernel-mode allocations such as the Windows kernel itself (e.g. sockets, socket buffers, etc.), device drivers, etc. The nonpaged pool is particularly important as "it is the availability of nonpaged pool that determines how many processes, threads, and other such objects can be created." If these pools are exhausted, this can lead to crashes, poor performance, application problems, and paging. If the system is using the /3GB mode, this comes at a cost of taking memory away from the kernel, including paged and non-paged pools (see the "Boot.ini Settings and Maximum Kernel Memory Space Sizes" section in this Microsoft Exchange article). To determine if this is the proximate cause, use perfmon to monitor the Memory\Pool Nonpaged Bytes counter. If this is hitting the server's nonpaged pool limit (within a few MB since perfmon is sampling on an interval), then this is the cause of the problem. However, this proximate cause may not be the root cause since the nonpaged pool exhaustion may be due to a nonpaged pool leak. A nonpaged pool leak can be determined using Microsoft's poolmon.exe. To increase kernel memory, lower the user-mode address space limit (/USERVA=X). The /3GB switch is effectively the same as /USERVA=3072 (don't ask me where the other 24MB went); for example, /USERVA=2800. This parameter would be used instead of /3GB. The documentation is not clear on how the additional space is allocated to the nonpaged pool and to what limits -- monitor your current and maximum nonpaged pool sizes with process explorer and work with Microsoft support to properly tune this value. A registry setting exists, NonPagedPoolSize, but again it's unclear how this plays with other limits. There also appears to be a PoolUsageMaximum value that controls when the memory manager starts to trim processes which may default to 80%. See also: http://technet.microsoft.com/en-u