Error In Accept Resource Temporarily Unavailable
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Socket Error Resource Temporarily Unavailable
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Fork Error Resource Temporarily Unavailable
each other. Join them; it only takes a minute: Sign up ERROR on accept: Resource temporarily unavailable up vote 4 down vote favorite I am trying to create single threaded server in linux (red-hut) in C that will listen to multiple sockets. I need to use non-blocking sockets, when I set the flags to non-blocking like this: int error 11 resource temporarily unavailable flagss = fcntl(socketfds[j],F_GETFL,0); flagss |= O_NONBLOCK; fcntl(socketfds[j],F_SETFL,flagss); I get: ERROR on accept: Resource temporarily unavailable Otherwise everything works perfectly. c linux sockets share|improve this question edited Jan 19 '12 at 23:18 EboMike 53k14112133 asked Oct 3 '11 at 13:11 oznus 1,06911411 add a comment| 1 Answer 1 active oldest votes up vote 10 down vote Resource temporarily unavailable is EAGAIN and that's not really an error. It means "I don't have answer for you right now and you have told me not to wait, so here I am returning without answer." If you set a listening socket to non-blocking as you seem to do, accept is supposed to set errno to that value when there are no clients trying to connect. You can wait for incoming connection using the select (traditional) or poll (semantically equivalent, newer interface, preferred unless you need to run on some old unix without it) or epoll (optimized for thousands of descriptors, Linux-specific) system calls. Of course you will be using poll (or any of the alt
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with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack resource temporarily unavailable read Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up C Sockets - Errno: 11, Resource Temporarily Unavailable up vote 7 down http://stackoverflow.com/questions/7635440/error-on-accept-resource-temporarily-unavailable vote favorite 3 I am using c sockets to implement a reliable UDP protocol. I am using the following code to set a timeout on a socket in which I'm waiting for an acknowledgement. I am not sure why I am getting errno 11, resource temporarily unavailable. //set timer for recv_socket struct timeval tv; tv.tv_usec = TIMEOUT_MS; if(setsockopt(rcv_sock, SOL_SOCKET, SO_RCVTIMEO,&tv,sizeof(tv)) < 0){ printf("Error setting the socket timeout.\n"); } int http://stackoverflow.com/questions/13554691/c-sockets-errno-11-resource-temporarily-unavailable recv_msg_len; if(recv_msg_len = recvfrom(rcv_sock, ackBuffer,sizeof(ackBuffer), 0, (struct sockaddr *) &servAddr2, &fromSize) < 0){ //timeout reached printf("Error Reporting: %d : %s\n", errno, strerror(errno)); num_timeouts++; } I have also tried the select method that was mentioned in the comments. I have the following code inside a loop, but the recvfrom never times out. fd_set set; FD_ZERO(&set); /* empties the set */ FD_CLR(rcv_sock,&set); /* removes FD from the set */ FD_SET(rcv_sock,&set); /* adds FD to the set */ if(select(rcv_sock + 1, &set, NULL, NULL, &tv) < 0){ printf("\nError Reporting: %d : %s\n\n", errno, strerror(errno)); return -1; } if(!FD_ISSET(rcv_sock,&set)){ /* true if FD is in the set */ printf("socket is not set properly.\n"); } c sockets udp share|improve this question edited Nov 25 '12 at 21:58 asked Nov 25 '12 at 19:37 rharrison33 5332927 Try using the select() and non-blocking sockets instead. The select() approach is much more flexible, reliable and portable. –Michael Sh Nov 25 '12 at 21:51 There is no call to recvfrom() int he second snippet. –alk Nov 26 '12 at 11:09 add a comment| 2 Answers 2 active oldest votes up vote 9 down vote accepted When calling recvfrom() on a blocking socket and a time out had been set usin
(Basic Quality Contributor) Email Updates: Status: Closed Impact on me: https://bugs.mysql.com/bug.php?id=48929 None Category:MySQL Server: General Severity:S3 (Non-critical) Version:all OS:Linux Assigned to: Magne Mæhre Tags: qc Triage: Triaged: D2 (Serious) View Add Comment Files Developer https://bz.apache.org/bugzilla/show_bug.cgi?id=19121 Edit Submission View Progress Log Contributions [20 Nov 2009 7:26] Peter Zaitsev Description: If running with innodb_file_per_table, innodb_open_files=20000 (some large number) large number resource temporarily of tables and when crash recovery is performed (so Innodb opens these files on startup) MySQL may be flooding error log with messages like this: 091119 23:03:34 [ERROR] Error in accept: Resource temporarily unavailable 091119 23:03:34 [ERROR] Error in accept: Resource temporarily unavailable 091119 23:03:34 [ERROR] Error resource temporarily unavailable in accept: Resource temporarily unavailable 091119 23:03:34 [ERROR] Error in accept: Resource temporarily unavailable Strace of the process shows the following: How to repeat: [percona@test9 msb_5_4_2]$ strace -f -p 19229 Process 19229 attached with 23 threads - interrupt to quit [pid 19286] rt_sigtimedwait([HUP QUIT ALRM TERM TSTP],
Password Login: [x] First Last Prev Next This bug is not in your last search results. Bug19121 - [error] (35)Resource temporarily unavailable: apr_accept: (client socket) Summary: [error] (35)Resource temporarily unavailable: apr_accept: (client socket) Status: RESOLVED FIXED Product: Apache httpd-2 Classification: Unclassified Component: Core Version: 2.0.45 Hardware: Sun other Importance: P3 minor (vote) TargetMilestone: --- Assigned To: Apache HTTPD Bugs Mailing List URL: Keywords: Depends on: Blocks: Show dependency tree Reported: 2003-04-17 17:39 UTC by Salvador Fandino Modified: 2007-06-09 07:21 UTC (History) CC List: 0 users Attachments Add an attachment (proposed patch, testcase, etc.) Note You need to log in before you can comment on or make changes to this bug. Description Salvador Fandino 2003-04-17 17:39:37 UTC I have compiled httpd 2.0.45 on NetBSD/sparc with option --enable-mods-shared=all and the error [error] (35)Resource temporarily unavailable: apr_accept: (client socket) appears continuosly on the log when running. Playing with the prefork configuration I have found that only one subprocess can be waiting on accept, other subprocesses get error 35 from the OS and die (then the master proccess spawns another proccess that tries to accept again and fails, etc., etc.). I have 2.0.44 installed with the same conf and it works fine. Bye, - Salva Comment 1 Jeff Trawick 2003-04-17 17:47:19 UTC This has been reported before (we need to see if it is still open). Can you try adding a second listening socket to see if the symptom goes away? With > 1 listening socket, Apache will need to mutex around a poll+accept call, so you won't have multiple processes in accept at the same time, and perhaps that circumvents whatever is going wrong. Alternatively, find this code in configure.in: *486-*-bsdi* | *-netbsd* | *-freebsd* | *-apple-darwin* | *-dec-osf* | *-qnx) APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1]) ;; delete those three lines, make extraclean && ./buildconf && ./configure --whatever && make && make install and see if the symptom goes away without having to add an additional listening socket as far as real problem resolution, I suspect this needs some dedicated debugging :) Comment 2 Salvador Fandin