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21 views

Linux kernel bug w/ netns and/or Xen guest - “unregister_netdevice: waiting for lo to become free”

I am running a web crawler in a Xen-based VM (on Linode); it makes heavy use of network namespaces to control use of VPNs on a per-crawl-process basis. It's been running mostly continuously for the ...
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0answers
41 views

Intermittent network failures, limited to certain client subnets

We've been seeing intermittent network failures. The failure mode tends to be that long running connections tend to drop out. We see it most with ssh and samba connections, although some occasional ...
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1answer
956 views

Intermittent DNS timeout

I have a network set up, and recently replaced our two Windows Server 2008 R2 domain controllers with two Windows Server 2012 R2 domain controllers. Both are VMs, each on a different physical machine. ...
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0answers
304 views

Windows Server 2008 domain controller appears to be dropping some packets

Some background: I have a small network with a Windows Server 2008 domain controller (with DNS and DHCP services) which had been running fine for approx 1 year. Recently I noticed that some DNS ...
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0answers
531 views

Connections being intermittently left open on JBoss for requests from clients

The issue I'm having is that occasionally a connection for a clientside request + the assosiated DB connection (using Oracle 10g RAC) get left open on JBoss EAP 4.3.0 CP10. Also a JBM JMS queue ...
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83 views

Intermittent Drops on Windows File Server

We have a Windows Storage Server (2003 R2) that serves as our NAS for our company. Over the past several weeks we have begun to experience intermittent "drops" where the client briefly loses their ...
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votes
1answer
440 views

RHEL BIND Server Intermittent error

I have a RHEL 5.7 server running bind-9.3.6-16.P1.el5. At seemingly random points during the day, the DNS will fail to resolve hosts on the LAN for about ten seconds. WAN hosts always resolve. Then ...
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1answer
4k views

Exchange 2003 Intermittent Active Sync Connectivity

Our environment is Active Directory 2003, Exchange 2003, with a mix of 2003, 2008 R2 servers. The only thing from the exchange side that does not work is Active-Sync with mobile phones. OWA is ...
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0answers
339 views

Intermittently git push hangs over ssh to gitosis

I have an intermittent problem pushing to my git (gitosis) repository. Most of the time it works fine but when it doesn't work the push hangs. It seems to have done the majority of what it wants to ...
1
vote
1answer
342 views

Intermittent 404 errors on IIS6, serving classic ASP content

We have 2 IIS6 web servers running in a cluster. Intermittently we receive a 404 / 500 error, if it's a 500 error i get an email with the line number, i check that line in the asp file and it's ...
2
votes
1answer
426 views

Connect to Apache times out randomly

We are trying to set up an Apache server on a remote machine, but we experience strange behaviour. Checking with telnet remote.machine 80, one of these things happen randomly: Connect and serve ...
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vote
2answers
402 views

Windows 2003 Server Intermittent DNS Issues

Looking for a little help here. I have a Windows 2003 DNS Server set up on our network. Lately computers on our LAN have been, at times, unable to resolve a certain sub domain for our website whereas ...
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8answers
3k views

Apache gets “clogged” with certain requests

I have a very odd intermittent issue. It occurs on a shared hosting server running CentOS and Apache/2.2.8, serving mostly PHP based websites at a rate of between 10 - 30 requests/sec. 3.5 GB RAM, ...