"SocketException: No buffer space available" on a non-blocking socket?

Why do i get "SocketException: No buffer space available" on non-blocking DatagramChannel.send()? According to the docs, it's just supposed to return 0 as the number bytes written, no?

Why did you crosspost this when it had already been answered?
http://forum.java.sun.com/thread.jspa?threadID=740520&tstart=0

Similar Messages

No buffer space available

We are executing a program that use a lot of memory, because that program read a big struct of a database in classes. It's executing properly in Win2000, but in Windows 9x ocurr this error:
No buffer space available (maximum connections reached?): connect
Anybody help me?
Thank you very much?

Have you tried using the -mx and -ms settings passed to java?
I've run very memory intensive things on 95 with jdk 1.2.2 and 1.3.1 and I've had pretty good luck.

IPv6 - No buffer space available

Anyone else seen this IPv6 weirdness:
6to4 tunnel to Hurricane Electric. Mac Pro is the router and tunnel endpoint (gif0). ip Protocol 41 passed through various routers/firewalls, etc.
sysctl'd ipv6 forwarding on and RA.
statically assigned /64 either end on subnet 2001:feed:d00d:1f04:: for tunnel
local wire net /64 subnet 2001:feed:d00d:1f05:: (I made up these example addrs, so don't get all bothered
rtadvd configured for en0, with :tc=ether.
en0 assigned a /128%en0 address in Control Panel. Perfect, works
great.
After about 8 hours, connectivity dies, err= "Sendmsg: No buffer space
available".
FYI: sysctl kern.ipc.maxsockbuf: 4194304
I can still ping locally and hit either end of the tunnel, but no external addresses, as routing has stopped. ipv6 and icmpv6 are not transmitted or received to/from routed nets. Inbound traffic is dumped on the floor, with no icmpv6 message, such as a type 1 (no route available).
What (semi) fixes it is to NOT assign the /128%en0 in Control Panel, instead ifconfig the address for en0. However, this stimulates a bug in rtadvd where it assigns an incorrect link local fe80:: as the default gw, if the Control Panel IPv6 is set to Auto. Even if rtadvd is configured correctly, a bug overrides the
rtadvd.conf en0 addr and advertises an incorrect link local addr as route 'default'.
netstat still shows the correct default route, gif0 is fine in terms of routes and so on and ip6fw rules are flushed for the purposes of this test.
Rock and a hard place .
thanks!
geoff

Hi Ananda and Vyara,
Thanks a lot for your replies!
Restart did not help (including restart the machine).
From the google search I also hit the same MS page. Obviously it did not help either. I guess there is some problem with connection to the SQL server. I checked the tcp connections and another server which is running well has more connections than this one.
Regards,
Hart

Hostapd `EAPOL TX: no buffer space available' error

Hi guys, I have just configured hostapd with NAT to let my smart phone use wired network. At first, it worked normally. But recently I found that sometimes, the connection between the AP and my phone seemed to fail after some time, especially when there are some other devices connecting my AP. Here 'fail' means no packets can be transfered between the two devices and any new device cannot establish a connection with the AP. It seems that at that time, my wireless device only broadcast an SSID, and when I look at the terminal, there are nothing uncommon except some `nl80211: EAPOL TX: no buffer space available' errors. When I tried to let my AP work again, I found that seemingly any actions, except restarting my laptop, does not work. I tried googling, but no luck.
My /etc/hostapd/hostapd.conf file:
interface=wlan0
bridge=br0
driver=nl80211
logger_syslog=-1
logger_syslog_level=2
logger_stdout=-1
logger_stdout_level=2
dump_file=/tmp/hostapd.dump
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
ssid=[ssid]
hw_mode=g
channel=7
beacon_int=100
dtim_period=2
max_num_sta=5
rts_threshold=2347
fragm_threshold=2346
macaddr_acl=0
auth_algs=3
ignore_broadcast_ssid=0
wmm_enabled=1
wmm_ac_bk_cwmin=4
wmm_ac_bk_cwmax=10
wmm_ac_bk_aifs=7
wmm_ac_bk_txop_limit=0
wmm_ac_bk_acm=0
wmm_ac_be_aifs=3
wmm_ac_be_cwmin=4
wmm_ac_be_cwmax=10
wmm_ac_be_txop_limit=0
wmm_ac_be_acm=0
wmm_ac_vi_aifs=2
wmm_ac_vi_cwmin=3
wmm_ac_vi_cwmax=4
wmm_ac_vi_txop_limit=94
wmm_ac_vi_acm=0
wmm_ac_vo_aifs=2
wmm_ac_vo_cwmin=2
wmm_ac_vo_cwmax=3
wmm_ac_vo_txop_limit=47
wmm_ac_vo_acm=0
eapol_key_index_workaround=0
eap_server=0
own_ip_addr=127.0.0.1
wpa=2
wpa_passphrase=[secret phrase]
wpa_key_mgmt=WPA-PSK
rsn_pairwise=CCMP
wpa_ptk_rekey=600
Please help me. At least let me know meaning and cause of the error message.

Bonjour,
Toutd'abord merci de votre réponse!
A première vu mes fichiers sont bien fermé après écriture, faudrait que je fasse un étude plus approfondie pour en être sûre à 100% mais si le problème viendrait de là je pense que mon erreur arriverait plus souvent que toute les 1 à deux semaine, en effet ma base de donnée tourne en permanence 24/24 7/7 en service sur windows pour recevoir les données provenant du moteur (les données sont stocké dans un mémoire cyclique dans la base de donnée). Je vais consulter plusieur fois mes données par jours en me connectant à ma base de donnée avec mon programme et ensuite je me deconnecte de la base de donnée quand j'ai vu ce que je voulais voir! Et ce plusieur fois par jour!! Mais certaine fois (toute les 1 à 2 semaines) je ne peux plus me connceter à cette base de donnée car j'ai cette erreur 10055 qui apparait, je dois donc redémarrer la base de donnée et le problème est résolu pour un certain temps à nouveau!
Cordialement
Sébastien Kuenlin

64 bit :::: 10055-WSAENOBUFS: No buffer space available

Hi,
on a Win 03 X64 box (SAP NW04S, PI usage, Oracle 10.2.0.2) there are several error message in dev_rd file like:
trc file: "dev_rd", trc level: 1, release: "700"
Thu Oct 29 23:50:59 2009
***LOG S00=> GwInitReader, gateway started ( 4920) [gwxxrd.c     1758]
systemid   562 (PC with Windows NT)
relno      7000
patchlevel 0
patchno    221
intno      20050900
make:      multithreaded, Unicode, 64 bit, optimized
pid        4920
gateway runs with dp version 243000(ext=110000) (@(#) DPLIB-INT-VERSION-243000-UC)
gateway (version=700.2009.02.03)
gw/local_addr : 0.0.0.0
CCMS: AlInitGlobals : alert/use_sema_lock = TRUE.
Bind service sapgw00 (socket) to port 3300
GwPrintMyHostAddr: my host addresses are :
1 : [10.10.10.44] wipsxi01 (HOSTNAME)
2 : [127.0.0.1] wipsxi01 (LOCALHOST)
Full qualified hostname = wipsxi01.ritel-it.com
DpSysAdmExtCreate: ABAP is active
DpSysAdmExtCreate: VMC (JAVA VM in WP) is not active
DpShMCreate: sizeof(wp_adm)##22784#(1752)
DpShMCreate: sizeof(tm_adm)##5912704#(29416)
DpShMCreate: sizeof(wp_ca_adm)##24064#(80)
DpShMCreate: sizeof(appc_ca_adm)#8000#(80)
DpCommTableSize: max/headSize/ftSize/tableSize=500/16/552064/552080
DpShMCreate: sizeof(comm_adm)##552080#(1088)
DpSlockTableSize: max/headSize/ftSize/fiSize/tableSize=0/0/0/0/0
DpShMCreate: sizeof(slock_adm)##0#(104)
DpFileTableSize: max/headSize/ftSize/tableSize=0/0/0/0
DpShMCreate: sizeof(file_adm)##0#(72)
DpShMCreate: sizeof(vmc_adm)##0#(1864)
DpShMCreate: sizeof(wall_adm)##(41664/36752/64/192)
DpShMCreate: sizeof(gw_adm)#48
DpShMCreate: SHM_DP_ADM_KEY##(addr: 000000000F870050, size: 6607136)
DpShMCreate: allocated sys_adm at 000000000F870050
DpShMCreate: allocated wp_adm at 000000000F872270
DpShMCreate: allocated tm_adm_list at 000000000F877B70
DpShMCreate: allocated tm_adm at 000000000F877BD0
DpShMCreate: allocated appc_ca_adm at 000000000FE21250
DpShMCreate: allocated comm_adm at 000000000FE23190
DpShMCreate: system runs without slock table
DpShMCreate: system runs without file table
DpShMCreate: allocated vmc_adm_list at 000000000FEA9E20
DpShMCreate: allocated gw_adm at 000000000FEA9EA0
DpShMCreate: system runs without vmc_adm
DpShMCreate: allocated ca_info at 000000000FEA9ED0
MtxInit: -2 0 0
GwDpInit: attached to gw_adm at 000000000FEA9EA0
ERROR => SiSelNSelect: SiSelect failed (10055-WSAENOBUFS: No buffer space available) [sixxsel.cpp 2951]
ERROR => NiSelISelectInt: select failed; internal error [nixxsel.cpp 976]
***LOG S02=> main, GwReceive (-01) [gwxxrd.c     973]
***LOG S0V=> GwStopGateway, gateway stopped () [gwxxrd.c     14737]
The results is that gateway doesn't work: every few secods stop and start again but only when J2EE is up and running, if I try to stop J2EE gateway end/start. This issue happends from few days.
Have you got any advice?
Regards.
Thank you for colleboration.
Edited by: Ganimede Dignan on Oct 30, 2009 12:09 AM

trc file: "dev_rd", trc level: 1, release: "700"
Fri Oct 30 01:16:15 2009
***LOG S00=> GwInitReader, gateway started ( 3656) [gwxxrd.c     1758]
systemid   562 (PC with Windows NT)
relno      7000
patchlevel 0
patchno    221
intno      20050900
make:      multithreaded, Unicode, 64 bit, optimized
pid        3656
gateway runs with dp version 243000(ext=110000) (@(#) DPLIB-INT-VERSION-243000-UC)
gateway (version=700.2009.02.03)
gw/local_addr : 0.0.0.0
CCMS: AlInitGlobals : alert/use_sema_lock = TRUE.
Bind service sapgw00 (socket) to port 3300
GwPrintMyHostAddr: my host addresses are :
1 : [10.10.10.44] wipsxi01 (HOSTNAME)
2 : [127.0.0.1] wipsxi01 (LOCALHOST)
Full qualified hostname = wipsxi01.ritel-it.com
DpSysAdmExtCreate: ABAP is active
DpSysAdmExtCreate: VMC (JAVA VM in WP) is not active
DpShMCreate: sizeof(wp_adm)          22784     (1752)
DpShMCreate: sizeof(tm_adm)          5912704     (29416)
DpShMCreate: sizeof(wp_ca_adm)          24064     (80)
DpShMCreate: sizeof(appc_ca_adm)     8000     (80)
DpCommTableSize: max/headSize/ftSize/tableSize=500/16/552064/552080
DpShMCreate: sizeof(comm_adm)          552080     (1088)
DpSlockTableSize: max/headSize/ftSize/fiSize/tableSize=0/0/0/0/0
DpShMCreate: sizeof(slock_adm)          0     (104)
DpFileTableSize: max/headSize/ftSize/tableSize=0/0/0/0
DpShMCreate: sizeof(file_adm)          0     (72)
DpShMCreate: sizeof(vmc_adm)          0     (1864)
DpShMCreate: sizeof(wall_adm)          (41664/36752/64/192)
DpShMCreate: sizeof(gw_adm)     48
DpShMCreate: SHM_DP_ADM_KEY          (addr: 000000000F870050, size: 6607136)
DpShMCreate: allocated sys_adm at 000000000F870050
DpShMCreate: allocated wp_adm at 000000000F872270
DpShMCreate: allocated tm_adm_list at 000000000F877B70
DpShMCreate: allocated tm_adm at 000000000F877BD0
DpShMCreate: allocated appc_ca_adm at 000000000FE21250
DpShMCreate: allocated comm_adm at 000000000FE23190
DpShMCreate: system runs without slock table
DpShMCreate: system runs without file table
DpShMCreate: allocated vmc_adm_list at 000000000FEA9E20
DpShMCreate: allocated gw_adm at 000000000FEA9EA0
DpShMCreate: system runs without vmc_adm
DpShMCreate: allocated ca_info at 000000000FEA9ED0
Fri Oct 30 01:16:16 2009
MtxInit: -2 0 0
GwDpInit: attached to gw_adm at 000000000FEA9EA0
ERROR => SiSelNSelect: SiSelect failed (10055-WSAENOBUFS: No buffer space available) [sixxsel.cpp 2951]
ERROR => NiSelISelectInt: select failed; internal error [nixxsel.cpp 976]
***LOG S02=> main, GwReceive (-01) [gwxxrd.c     973]
***LOG S0V=> GwStopGateway, gateway stopped () [gwxxrd.c     14737]

10.4.11 and "No buffer space available"

Hi!
Just updated to 10.4.11 and now i can't connect to internet.
My AirPort works, i can ping the router, but thats all.
When i try to use Safari i get this msg:
"POSIX error: "no buffer space available" (NSPOSIXErrorDomain:55)"
Anyone have a clue?

Im running 10.5.1. I use a general purpose utility called Cocktail and was fiddling with the network settings. On reboot, opening up Safari resulted in the "..no buffer space NSPOSIXErrorDomain:55 message. Deleting /Library/StartupItems/Cocktail fixed it.

ASR multicast: Could not write data: No buffer space available

I am trying to multicast a disk image to multiple iMacs. Here is my plist config for the server:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
          <key>Data Rate</key>
          <integer>12000000</integer>
          <key>Multicast Address</key>
          <string>224.77.2.121</string>
</dict>
</plist>
I use the following command to start the server:
sudo asr -source labmac.dmg -server multicast.plist
The terminal responds "Ready to start accepting clients"
Then I go to one of the iMacs that will receive the image. I am netbooting the client off of the same server that is multicasting the image over ASR. I try to start the imaging process by issuing the following command on the client:
sudo asr -source asr://server.ip.add.ress -target /Volumes/Macintosh HD -erase
The command is accepted, confirms that I would like to erase the drive, and then says "Restoring" but no progress shows.
Back on the server, the terminal will output the following continuously until I cancel the multicast:
Starting stream Sun Feb 10 15:55:10 2013
asr: Could not write data: No buffer space available
The multicast seems to be working because the entire network gets bogged down, so why is it that it is unable to transfer the image data?

Did you end up figuring this out? i'm on the same boat

Writing Java Non-Blocking Socket Server for Winsock Client

Hi.
Im a newbie to Sockets. I need to write a Non-Blocking Socket server (using java.nio) that accepts connection and reads the data sent by WinSock clients, and write them to another winsock client. Its quite intriguing. How do I do that? Is it possible?
Thanks in advance
Arun

Well, in traditional 4.2 BSD sockets, you'd fill up a set of filedescriptors of connections (an array of bits usually), and push that in the read parameter of a call to 'select'. Select then blocks until at least one of the file descriptors become available for reading, or writing if you also made an fd_set full of file descriptors (but you can usually write freely to a socket, so there is not much use for that). Then you start finding out which of these file descriptors have actually become available for reading, and you pass those to a bunch of worker-threads. The advantage is that your set of worker-threads can be quite small, while your number of connections can still be quite large (unless, of course, everyone of your clients start talking all at once, but that is no different from the one-socket-one-thread-model that java.net.* forces upon you).
In java, the 'select' call is replaced by a call to java.nio.channels.Selector.select(); and then the fishing out of the selected stuff comes from java.nio.channels.Selector.selectedKeys().
To add a thingy to a selector, use (for example) java.nio.channel.ServerSocketChannel.register(Selector, ops, att);
whereby the ops parameter is the kind of action you'd like to select this channel for; SelectionKey.OP_READ etc..
The workerthread bit is also easy to write, but I leave that to you as an exercise.

UTL_TCP (blocking or non-blocking sockets mode)

Hi for All,
Please, someone knows if the UTL_TCP using blocking or non-blocking sockets mode? I did a search but can not find this information.
Regards,

Blocking only occurs when you attempt to read from the socket and there's no data to read. (in which case, the time out setting applies if specified)
This is however not that robust in my experience. UTL_TCP provides a peek method (returns byte size of socket buffer) that tells you whether or not there is data for that socket. This enables you to verify that you read on that socket will not be a blocking call.
I prefer using this method, as dealing with a timeout approach results in run-time behaviour issues (either a call waiting too long, or a call timing out too quickly).

Broken Pipe with Non-blocking Socket

Hello,
I write a Unix Agent who connect on a Windows Server with socket...
Working well on Linux but on Solaris my problem is:
-When my agent is running before server at connection all seems OK: Connect, Select and Getsockopt but when I try to send data I have always EPIPE Signal but I can receive datas from server !
- When my agent is strarting after the server all it's Ok
I don't unserstand this appears on Solaris SPARC 8 and Solaris 9 Intel ...
Please Help is there something special with non-blocking sockets on Solaris ?
Thanks

Can't help you much but what I would recommend is that you
insure that your pipes are opened for both read/write, even
though you are only going to read or write from it. This insures
that the pipe does not close down when you hit EOF.

Non blocking sockets

Hi All,
Anybody have some idea about how to implement non blocking sockets using two threads/Can u help me with some sites where i can get more information in this topic.
Regards
Priya

hi,
you could have a look at the nonblocking io (nio) api's present in jdk1.4, that should do the trick. this link ought to get u started i suppose..
http://developer.java.sun.com/developer/technicalArticles/releases/nio/
hope this helps.
cheerz
ynkrish

Read Timeout on non-blocking sockets

Hi,
I was wondering if there is a way to specify a read timeout (like setSoTimeout for synchronous sockets) when using a non-blocking socket.
I'd like to have the select() method return is a sockets timeout expires, puting in the selected key set the timedout socket and have it's read operation return -1, something like what happens when a socket is closed by the other side.
The thing is I need this to be a timeout specific to each socket, thus the select(millis) isn't apropriate.
Anyone knows of something like this?
Thanks....

Yeah, select() is the only thing built in for that, and you have to do the bookkeeping yourself. You would start something like forming the disjunction of the ready keys and the registered keys after each select, to get the unready keys, and then looking at their history to see how long they have been unready via a Map{key,Long(time)).

Non Blocking Socket ans Session management

All samples of Non Blocking socket use SelectionKey.attach( Object ob) to attach a partial message if the received data is incomplete. So far so good.
Are we supposed to use the same approach for session management ( Keeping info on Username, password, timeout values, etc.)
Thanks

I disagree with your first statement. The attachment is normally a session object that contains user information, session state, and the ByteBuffer.

Easy way to non-blocked sockets

Use JSSE and NIO for a quick way to implement non-blocking communications
October 22, 2003
Although SSL blocking operations -- in which the socket is blocked from access while data is being read from or written to -- provide better I/O-error notification than the non-blocking counterpart, non-blocking operations allow the calling thread to continue. In this article, the author will cover both the client and server side as he describes how to create non-blocking secure connections using the Java Secure Socket Extensions (JSSE) and the Java NIO (new I/O) library, and he will explain the traditional approach to creating a non-blocking socket, as well as an alternative (and necessary) method if you want to use JSSE with NIO.
http://www-106.ibm.com/developerworks/java/library/j-sslnb.html?ca=dgr-jw03j-sslnb

MORE IBM SPAM Previous discussion
I find it interesting spam, but thats a matter of taste. If the OP was truly interested in "trying to get new information out there" he would answer the mulitple questions about NIO and especially NIO mixed with traditional Sockets and NIO vs Secure Sockets. These are all on ALT, NIO is of no interest to New to Java folk.
Given their budget I think IBM could do a better job of publishing their research.

Detecting When a Non-Blocking Socket Is Closed by the Remote Host

Hi,
Using NIO non blocked sockets how do I detect when a Non-Blocking Socket Is Closed by the Remote Host?
What I have read is:
The only way to detect that the remote host has closed the connection is to attempt to read or write from the connection. If the remote host properly closed the connection, read() will return -1. If the connection was not terminated normally, read() and write() will throw an exception.
I have written a server test program using NIO and an applet connecting to the server program via sockets.
When I after a successful connection shuts down the browser following happens: The code below comes in an endless loop though mySelector.select returns 0 every time. (The selector is registered for OP_READ). size = 1.
while (true) {
int n = mySelector.select();
int size = mySelector.keys().size();
if (n == 0) continue;
Is this an expected result?
How do I get to know what client has lost connection?
My environment:
W2000
java 1.4.1 build 1.4.1_01-b01
Browser used: IE 5.0
Many thanks for your help on this matter!
Regards Magnus Wistr�m

What you're doing looks OK to me.
I wonder whether your thread is being interrupted by Thread.intterupt() somewhere. Try putting a Thread.interrupted() before the select call.
Sylvia.

"SocketException: No buffer space available" on a non-blocking socket?

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