Ssh configuration to avoid connection timeouts / broken pipes ?

I'm running irssi through screen on my server via ssh. Recently, my parents' internet connection has become very dodgy, and because of this, my terminal freezes altogether once every 15 minutes or so, and resumes with some "broken pipe" message after a very long time (around 10 minutes). I usualy just kill the terminal when I notice the freezing and open a new one with another ssh connection, but this seems to be getting more and more frequent, so it's very annoying. I was wondering if there is a way to get around this? Server configuration, client configuration, a different ssh client ... ?
By googling, I found that disabling "TCPKeepAlive" might do the trick, and so I did. It seemed to work at first, my connection was up for about half an hour, but then the same thing occured again
The sadest part of this is that by using puTTY on my phone over 3G, the connection stays up forever, but with the wired broadband, it won't stay up for more than 15 minutes
EDIT: This time I got this message: "Timeout, server <myaddress> not responding", after 29 minutes.
Last edited by pauligrinder (2011-04-24 00:50:30)

yep, this connection used to be reliable too, but now I get timeouts all the time, and also if I connect the Deluge-GTK to a daemon running on my server, it will randomly freeze and I have to reconnect to get it to work again. Luckily I'm getting out of here tomorrow
Still, it would be nice to solve this problem, because I will be coming here every once in a while... I would call the ISP and complain (I don't think the problem can be with our routers, because ssh connections inside the LAN work just fine), but because it's easter, their customer support is closed Besides, I don't know how to explain the problem to them, because most likely they won't even know what ssh is...
I tried rwd's configs, and they didn't help either. The only difference is that it seems to timeout faster now, instead of freezing the whole terminal for a long time...
Last edited by pauligrinder (2011-04-25 14:13:11)

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Possible to configure per connection timeout values?

hi,
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Jackd + guitar: "timeouts and broken pipes"

Hi friends! I'm trying to pass my electric guitar via any rack/effects (like Guitarix or Creox) with no luck. I've got this sound card:
01:06.0 Multimedia audio controller: Creative Labs [SB Live! Value] EMU10k1X
01:06.1 Input device controller: Creative Labs [SB Live! Value] Input device controller
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jackd 0.121.3
Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others.
jackd comes with ABSOLUTELY NO WARRANTY
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Hi!
groups && cat /proc/asound/cards && cat ~/.asoundrc && cat '/etc/security/limits.d/audio.conf' && jackd -v
adm disk lp wheel http network video audio optical storage power users polkitd vboxusers wireshark kismet
0 [Live ]: EMU10K1X - Dell Sound Blaster Live!
Dell Sound Blaster Live! at 0xcc00 irq 17
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cat: /etc/security/limits.d/audio.conf: No such file or directory
I have a file called 99-audio.conf
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http://ompldr.org/vZ3A2eg
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Last edited by iamgabo (2012-12-15 02:21:08)

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DEBUG Coherence:3 - 2013-02-01 11:12:20.584/85.322 Oracle Coherence GE 3.7.1.5 <D6> (thread=Proxy:TcpProxyServicePof:TcpAcceptor, member=1): Closed: TcpConnection(Id=0x0000013C953D8F150AA202D9F632E5EAFD6BDDE1A713F026C65BC1E7CC1E5952, Open=false, Member(Id=0, Timestamp=2013-02-01 11:11:44.404, Address=127.0.0.1:0, MachineId=0, Location=site:,process:1612, Role=WeblogicServer), LocalAddress=10.162.2.217:28088, RemoteAddress=10.162.2.231:45202) due to:
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at com.tangosol.coherence.component.util.daemon.queueProcessor.service.peer.Acceptor.checkPingTimeouts(Acceptor.CDB:7)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Peer.onNotify(Peer.CDB:115)
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com.tangosol.net.messaging.ConnectionException: TcpConnection(Id=0x0000013C953D8F150AA202D9F632E5EAFD6BDDE1A713F026C65BC1E7CC1E5952, Open=true, Member(Id=0, Timestamp=2013-02-01 11:11:44.404, Address=127.0.0.1:0, MachineId=0, Location=site:,process:1612, Role=WeblogicServer), LocalAddress=10.162.2.231:45202, RemoteAddress=10.162.2.217:28088)
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at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Peer.post(Peer.CDB:23)
at com.tangosol.coherence.component.net.extend.Channel.post(Channel.CDB:25)
at com.tangosol.coherence.component.net.extend.Channel.request(Channel.CDB:18)
at com.tangosol.coherence.component.net.extend.Channel.request(Channel.CDB:1)
at com.tangosol.coherence.component.net.extend.RemoteNamedCache$BinaryCache.putAll(RemoteNamedCache.CDB:10)
at com.tangosol.util.ConverterCollections$ConverterMap.putAll(ConverterCollections.java:1708)
at com.tangosol.coherence.component.net.extend.RemoteNamedCache.putAll(RemoteNamedCache.CDB:1)
at com.tangosol.coherence.component.util.SafeNamedCache.putAll(SafeNamedCache.CDB:1)
at com.tangosol.net.cache.CachingMap.putAll(CachingMap.java:1023)
Caused by: java.net.SocketException: Write failed: Broken pipe
at jrockit.net.SocketNativeIO.writeBytesPinned(Native Method)
at jrockit.net.SocketNativeIO.socketWrite(SocketNativeIO.java:46)
at java.net.SocketOutputStream.socketWrite0(SocketOutputStream.java)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:104)
at java.io.DataOutputStream.write(DataOutputStream.java:90)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.peer.initiator.TcpInitiator$TcpConnection.send(TcpInitiator.CDB:27)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Peer.send(Peer.CDB:29)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Peer.post(Peer.CDB:23)
at com.tangosol.coherence.component.net.extend.Channel.post(Channel.CDB:25)
at com.tangosol.coherence.component.net.extend.Channel.request(Channel.CDB:18)
at com.tangosol.coherence.component.net.extend.Channel.request(Channel.CDB:1)
at com.tangosol.coherence.component.net.extend.RemoteNamedCache$BinaryCache.putAll(RemoteNamedCache.CDB:10)
at com.tangosol.util.ConverterCollections$ConverterMap.putAll(ConverterCollections.java:1703)
at com.tangosol.coherence.component.net.extend.RemoteNamedCache.putAll(RemoteNamedCache.CDB:1)
at com.tangosol.coherence.component.util.SafeNamedCache.putAll(SafeNamedCache.CDB:1)
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I can ping the client machine from the server without a problem.
Has anybody seen this before?
Edited by: 982740 on Feb 1, 2013 2:29 AM

Hi user,
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kalle
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Please, let me know if yes or no. I have a workmate with the same problem and we didn't find any clue about the problem.
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Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
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Select
/var/log ▹ cups ▹ error_log
from the hierarchical list on the left side of the Console window. If you don't see that list, select
View ▹ Show Log List
from the menu bar. Then select the messages from the time of the last failed printing attempt. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message (command-V).
If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.
When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.
Please do not indiscriminately dump thousands of lines from the log into this discussion.

Broken Pipe / Connection Reset Errors

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at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:231)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:225)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:127)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:272)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3151)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:1973)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:1880)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1310)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:207)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:179)
>

What I did to prevent the same issue was ensure all servlets had try/catch blocks where I ignored broken pipe exceptions and all JSPs had error pages that similarly ignored broken pipe exceptions. Worked 90% of the time. Had a couple of places where custom tags were catching exceptions, logging them, then rethrowing them that I had to fix (hopefully InsertTag isn't doing this). I think I ended up with only one place where I still had a problem, which was somewhere inside of WLS. Happened when the user closed their browser as WebLogic was writing back a large response, I believe. We just made sure our responses were as small as possible to avoid this. Stripped out white space from our JSPs during compilation and put a lot into CSS.

Broken Pipe/Connection Reset By Peer IO Exceptions

Can someone explain what causes a connection reset by peer exception vs.
          a Broken Pipe IO exception? I realize they are generally caused by
          someone hitting stop, closing their browser, hitting a different link,
          etc.. but I was trying to understand what might cause a connection
          reset by peer exception vs. a broken pipe exception. I've added code to
          my servlet to suppress the "Connection Reset By Peer" socket exceptions
          but I'm wondering if I should do the same with Broken Pipe. Also, are
          there are other types of similar exceptions that can occur when users
          get impatient.. Thanks
          Kirk


I do not have an idea about your application server but i do know how i solved it in weblogic. Just see whether this is helpful to you.
Points to be sure of........
1) Make sure that when ever you request a connection from a pool, after you are done with it return it. If you are not returning it and trying to use that reference again, this problem will occur.
2) Look at the capabilities of your app server. Set the connection pool such that
a) All the connections are checked at regular interval with some default select statement from any table in the database.
b) Connections are check when the connection is checked out and returned to the pool.
I the connection object is not ready , close it and create a new one. The app server which manages the pool should implement these feature so that when you get the connection - its the tested and working object.
If your app server does not support - then think of ways you testing it before you using it(Anyway this is not the good solution).

Connection reset by peer:/Broken pipe using JTurbo JDBC Driver

I am using the JTurbo JDBC driver to connect to a SQL Server 7.0 database. I am using Connection Pooling. After roughly an hour or so, I am no longer to get connections from the pool. Exceptions thrown are "connection reset by peer", followed by "Broken pipe" exceptions on every subsequent getConnection call.
Has anyone found a successfull resolution to this problem using the JTurbo JDBC driver for SQL Server 7.0? I have tried the "autoReconnection=true" option on the URL string for the driver, but this has had no effect.
I am running the Resin app server, version 1.2.7, on Solaris 8 and connecting to a SQL Server database running on NT 4.0. The JVM on Solaris where the servlet is running is 1.3.1.
Any help is greatly appreciated!
Mark Crouch
Lead Developer
accessKent

I do not have an idea about your application server but i do know how i solved it in weblogic. Just see whether this is helpful to you.
Points to be sure of........
1) Make sure that when ever you request a connection from a pool, after you are done with it return it. If you are not returning it and trying to use that reference again, this problem will occur.
2) Look at the capabilities of your app server. Set the connection pool such that
a) All the connections are checked at regular interval with some default select statement from any table in the database.
b) Connections are check when the connection is checked out and returned to the pool.
I the connection object is not ready , close it and create a new one. The app server which manages the pool should implement these feature so that when you get the connection - its the tested and working object.
If your app server does not support - then think of ways you testing it before you using it(Anyway this is not the good solution).

Ssh configuration to avoid connection timeouts / broken pipes ?

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