Bind Failed. Error Code 98 Message Address Already In Use
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Transport Error 202 Bind Failed Address Already In Use Weblogic
favorite 1 I'm trying to make a server / client connection with sockets. But they will not close properly and I can't wrap my head around why. Update 1 I've corrected my stupid misstake below of not actually CALLING the s.close function in the question. But it turn out this was'nt my problem. End of updates This is my server code: #!/usr/bin/env python # -*- coding: utf-8 -*- transport error 202 bind failed address already in use jboss import socket import sys if __name__ == '__main__': # Server connection s = socket.socket() # Create a socket object host = socket.gethostname() # Get local machine name port = 12345 # Reserve a port for your service. print 'Server started!' print 'Waiting for clients...' s.bind((host, port)) # Bind to the port s.listen(5) # Now wait for client connection. c, addr = s.accept() # Establish connection with client. print 'Got connection from', addr msg = c.recv(1024) print addr, ' >> ', msg if msg == 'close': print 'Closing down' c.send('SENT: Closing down') c.shutdown(socket.SHUT_RDWR) c.close() This is my client code: #!/usr/bin/env python # -*- coding: utf-8 -*- import socket if __name__ == '__main__': # Server s = socket.socket() # Create a socket object host = socket.gethostname() # Get local machine name port = 12345 # Reserve a port for your service. print 'Connecting to ', host, port s.connect((host, port)) msg = raw_input('CLIENT >> ') s.send(msg) msg = s.recv(1024) print 'SERVER >> ', msg s.close() # Close the socket when done And this is the error message it produces: In [13]: %run cjboxd.py Server started! Waiting for clients... --------------------------------------------------------------------------- error Traceback (most recent call last) /usr/lib/python2.7/dist-packages/IPython/utils/py3compat.pyc in execfile(fname, *where) 173 else: 174 filename =
and both ends must ACK (acknowledge) each other's FIN packets. The FIN packets are initiated by the application performing a close(), a shutdown(), or an exit(). The ACKs are handled by the kernel after the close() has completed. Because of bind failed address already in use iperf this, it is possible for the process to complete before the kernel has released the associated
Bind Failed Address Already In Use Faceniff
network resource, and this port cannot be bound to another process until the kernel has decided that it is done. Figure 1 Figure 1
Iperf Bind Failed Address Already In Use Windows
shows all of the possible states that can occur during a normal closure, depending on the order in which things happen. Note that if you initiate closure, there is a TIME_WAIT state that is absent from the other side. This http://stackoverflow.com/questions/12458019/shutting-down-sockets-properly TIME_WAIT is necessary in case the ACK you sent wasn't received, or in case spurious packets show up for other reasons. I'm really not sure why this state isn't necessary on the other side, when the remote end initiates closure, but this is definitely the case. TIME_WAIT is the state that typically ties up the port for several minutes after the process has completed. The length of the associated timeout varies on different operating systems, and may be dynamic on some http://hea-www.harvard.edu/~fine/Tech/addrinuse.html operating systems, however typical values are in the range of one to four minutes. If both ends send a FIN before either end receives it, both ends will have to go through TIME_WAIT. Normal Closure of Listen Sockets A socket which is listening for connections can be closed immediately if there are no connections pending, and the state proceeds directly to CLOSED. If connections are pending however, FIN_WAIT_1 is entered, and a TIME_WAIT is inevitable. Note that it is impossible to completely guarantee a clean closure here. While you can check the connections using a select() call before closure, a tiny but real possibility exists that a connection could arrive after the select() but before the close(). Abnormal Closure If the remote application dies unexpectedly while the connection is established, the local end will have to initiate closure. In this case TIME_WAIT is unavoidable. If the remote end disappears due to a network failure, or the remote machine reboots (both are rare), the local port will be tied up until each state times out. Worse, some older operating systems do not implement a timeout for FIN_WAIT_2, and it is possible to get stuck there forever, in which case restarting your server could require a reboot. If the local application dies while a connection is active, the port will be tied up in TIME_WAIT. This is also true if the application dies while a connection is pending. Strategies for Avoidance SO_R
Get Kubuntu Get Xubuntu Get Lubuntu Get UbuntuStudio Get Mythbuntu Get Edubuntu Get Ubuntu-GNOME Get UbuntuKylin Ubuntu Code of Conduct Ubuntu Wiki Community Wiki Other https://ubuntuforums.org/showthread.php?t=1636667 Support Launchpad Answers Ubuntu IRC Support AskUbuntu Official Documentation User Documentation Social http://www.thecodingforums.com/threads/socket-error-errno-98-address-already-in-use.733361/ Media Facebook Twitter Useful Links Distrowatch Bugs: Ubuntu PPAs: Ubuntu Web Upd8: Ubuntu OMG! Ubuntu Ubuntu Insights Planet Ubuntu Activity Page Please read before SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Desktop Environments [SOLVED] (98)Address already in use: make_sock: could not bind to address already address 0.0.0.0:80 Having an Issue With Posting ? Do you want to help us debug the posting issues ? < is the place to report it, thanks ! Results 1 to 9 of 9 Thread: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode address already in Switch to Threaded Mode December 3rd, 2010 #1 hhabashy View Profile View Forum Posts Private Message First Cup of Ubuntu Join Date Nov 2007 Beans 3 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 I would like to state first of all I am a novice with Linux, but have working in IT for 15 years. I have been searching the web on this issue for almost 2 days (off and on), and have found that my particular issue was not the same as the norm for this particular error code. I would like to give back (if you will). Apparently having a cert.key password protected will hang Apache2 (maybe Apache as well). The solution was to remove the password on the cert.key and that solved my problem. The general consensus with resolving this issue did help me figure out that apache2 was running but waiting for password on boot-up. The following command which you will find everywhere out in the cloud is as follows: sudo netstat -ltnp | grep ':80' (it is important to note that apache was hangin
in use" when i try to open a socket that got closed before with close(). How come close() doesn't close the socket properly? My socket code : s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.bind((host, port)) s.listen(1) .... .... .... while loop: conn, addr = s.accept() while conn and loop: .... .... .... conn.close() Shouldn't that clean it all up properly? Thanks for hints & suggestions! Ron cerr, Sep 15, 2010 #1 Advertisements Thomas Jollans Guest On Wednesday 15 September 2010, it occurred to cerr to exclaim: > Hi There, > > I get a socket error "[Errno 98] Address already in use" when i try to > open a socket that got closed before with close(). How come close() > doesn't close the socket properly? > My socket code : > > s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) > s.bind((host, port)) > s.listen(1) > ... > ... > ... > while loop: > conn, addr = s.accept() > while conn and loop: > ... > ... > ... > conn.close() > > Shouldn't that clean it all up properly? `s` is still listening? Thomas Jollans, Sep 15, 2010 #2 Advertisements Guest -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 El 15/09/2010 20:58, Grant Edwards escribió: > On 2010-09-15, cerr <> wrote: > >> I get a socket error "[Errno 98] Address already in use" when i >> try to open a socket that got closed before with close(). How >> come close() doesn't close the socket properly? My socket code : >> >> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) >> s.bind((host, port)) s.listen(1) ... ... ... while loop: conn, >> addr = s.accept() while conn and loop: ... ... ... conn.close() > > At what line does the error occur? > > To what does the phrase "open a socket" refer? > > Have you tried the usual solution of setting the SO_REUSEADDR > option on the socket before calling bind? > > http