Domain Name Server Freeze/Hang
May 9, 2009i have a strange issue on one of my servers where dns keeps freezing or hanging every now and then, if i restart the service on cpanel.
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Diagnosing A Server 'freeze'
Jan 4, 2007One of the linux servers I run is just *not* stable, like freezing every 48 hours at random times, being unable to respond to pings or connect through SSH. The server comes back after a hard-reboot.
Since other boxes I manage, a lot more busier and using the same kernel and OS are just up and running for months, I'm just wondering if I should switch hardware / server to test
OS is CentOS 4.4, official kernel 2.6.9-42
I see *no* kernel panics at /var/log/messages
I see nothing weird at other logs (apache, etc) so I'm kinda lost as I don't know where to look for clues.
What To Check When Server Hang
Sep 3, 2007One of my server hang w/o obvious reason. What is the checklist to adhere when troubleshooting? It is running on FreeBSD
View 5 Replies View RelatedServer Hang - No Free Swap
Mar 24, 2008I encounter this problem in one of my server today..
Memory is 99% used
Swap is 100% used
top - 20:50:53 up 2 days, 7:05, 2 users, load average: 69.58, 41.63, 24.91
Tasks: 397 total, 57 running, 334 sleeping, 1 stopped, 5 zombie
Cpu(s): 1.9% us, 96.5% sy, 0.1% ni, 0.0% id, 0.0% wa, 0.5% hi, 1.0% si
Mem: 2076300k total, 2027140k used, 49160k free, 1116k buffers
Swap: 5245212k total, 5245212k used, 0k free, 13108k cached
Over my KVM, it just hang. When I try to type something, it shows this on the KVM screen:
[17379796.260000] HighMem 59*4kB 3*8kB 0*16kB 0*32kB 0*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 664kB
[17379796.260000] Swap cache: add 6615861, delete 6615849, find 2695269/27558673, race 0+86
[17379796.260000] Free swap = 0kB
[17379796.260000] Total swap = 5245212kB
Based on the message on screen, what is the message telling me?
[17379796.260000] HighMem 59*4kB 3*8kB 0*16kB 0*32kB 0*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 664kB
[17379796.260000] Swap cache: add 6615861, delete 6615849, find 2695269/27558673, race 0+86
Server To Hang/overload Once Its Rebooted
Apr 5, 2007how can i find out what has caused my server to hang/overload once its rebooted?
I know that the SWAP maxed out but i am unsure why.
Squirrelmail :: Login Logout Page Freeze
May 31, 2009I've recently upgraded squirrelmail to latest version, and now I get problem like 3 or 4 times when u login and logout and try to login again the page freezes and gets stuck it's saying "connected waiting for reply" it keeps happening not only to me but every user in the server (multiple connections and multiple computers)
View 4 Replies View RelatedOpenVZ PAE Hang?
Aug 12, 2007I am trying to run the OpenVZ PAE kernel with 8 gigs of ram to back the server, however the server keeps suffering from hangings.
It starts 2 or 3 vpses fine, but once it hits 4 or so, it hangs without a kernel panic or any other proper error message.
The kernel version is 2.6.18-8.1.8.el5.028stab039.1PAE but it also does it on 2.6.18-ovz028stab039.1-enterprise
Anybody have the same problem and come up with a solution? Node is running CentOS 5.
Apache Used To Hang
Apr 4, 2008I have a dedicated server running CentOS which has been been running fine for a while now.
On the odd day Apache used to hang, I presume due to load so I installed SIM (System Integrity Manager) to check the status of httpd and to re-start when necessary.
Every now and again SIM would email saying that apache was re-started, no big deal.
Then this morning I got a email from SIM saying apache was down but couldn't be re-started. I then logged into the shell and tried to do a: service httpd restart
I then got a message saying something like: could not bind to port 80. I then tried to kill all httpd processes and re-start apache but the problem persisted. I then just rebooted my server and apache started fine.
Since then I have had hundreds of emails from SIM saying that it has had to re-start apache. Somehow it is detecting it as down and re-starting it. Apache seems to be up and fine. Re-installing SIM does not help.
The weird thing is when I logged in using Putty I got the "server's host key did not match the signature supplied" message like something had changed.
Rkhunter does not return anything just a couple of warnings.
Does anybody know what would cause sim to constantly detect Apache as down in this situation and also how this could happen with no changes being made?
Weird Periodic Hang
Jul 9, 2007For the last week, my vps (directadmin on centos on xen) has become unresponsive every three days at approximately 5 AM, and I'm baffled about why. It doesn't crash, but it stops accepting incoming connections until it's rebooted.
I'm not sure how to troubleshoot this. /var/log/messages gives no useful information. There are no unusual cronjobs running at that time.
Anyone heard of anything like this before or have any advice about how to troubleshoot?
Freeze On Running Command "make"
Jul 9, 2007Recently brought a new server, works fine however when ever i run the command "make" either apache, eaccelerator or any kind of software a few seconds later the server hangs. It is then hard rebooted, no errors are shown the server just freezes.
Ive had a OS reinstall.
Coldfusion 8 - MSSQL 5 Page Hang
Oct 26, 2009We had a Coldfusion site running MySQL without issues. We are in the process of doing some upgrades and as part of that we recently switched over to MSSQL 5. Ever since that happened, we will have random page hangs. This usually happens on pages with more complex queries, but it is very random. There is no timeout error on the server, no page cannot be displayed errors, no errors of any kind, the page will just hang. We have been monitoring our server resource monitor and we can see when the page 'gives up', we will go from 100% CPU down to almost 0, and then the page simply never recovers. Does anyone have any idea what might be going on? When there is no error message of sorts it makes it very problematic to troubleshoot.
View 3 Replies View RelatedE1000_clean_tx_irq: Detected Tx Unit Hang
Aug 11, 2007in one of my CentOS 64bit, there is errors with NICs
NETDEV WATCHDOG: eth0: transmit timed out
e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full Duplex
e1000: eth0: e1000_watchdog_task: 10/100 speed: disabling TSO
e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
Tx Queue <0>
TDH <59>
TDT <5c>
next_to_use <5c>
next_to_clean <58>
buffer_info[next_to_clean]
time_stamp <1241628eb>
next_to_watch <59>
jiffies <124162eba>
next_to_watch.status <0>
e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
Tx Queue <0>
TDH <59>
TDT <5c>
next_to_use <5c>
next_to_clean <58>
buffer_info[next_to_clean]
time_stamp <1241628eb>
next_to_watch <59>
jiffies <12416368a>
next_to_watch.status <0>
Is there any idea for fixing? It's SM PDSMI+ board. Kernel 2.6.9-55.0.2.ELsmp #1 SMP Tue Jun 26 14:14:47 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
Grsec Kernel Either Panics Or Hang On Reboot
Mar 29, 2008I installed latest kernel ( 2.6.24.4 or 2.6.24.3 ) with grsec which either panics or hang on reboot before reaching boot prompt, just when /sbin/init runs. Experienced the same with grsec patched kernel 2.6.22.9 on several servers with the same hardware.
On server with AMD Operton, I was able to successfully compile 2.6.24.4 with grsec and boot into.
Server hardware details
--------------------------
[root@server kernels]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU 5148 @ 2.33GHz
stepping : 6
cpu MHz : 2333.469
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr dca lahf_lm
bogomips : 4670.51
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU 5148 @ 2.33GHz
stepping : 6
cpu MHz : 2333.469
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr dca lahf_lm
bogomips : 4667.16
[root@server kernels]#
[root@server ~]# uname -a
Linux server.name 2.6.19.2-grsec #1 SMP Tue Jan 15 07:08:50 CST 2008 i686 i686 i386 GNU/Linux
[root@server ~]#
[root@server kernels]# lspci
00:00.0 Host bridge: Intel Corporation 5000P Chipset Memory Controller Hub (rev b1)
00:02.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 2-3 (rev b1)
00:04.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 4-5 (rev b1)
00:06.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 6-7 (rev b1)
00:08.0 System peripheral: Intel Corporation 5000 Series Chipset DMA Engine (rev b1)
00:10.0 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev b1)
00:10.1 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev b1)
00:10.2 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev b1)
00:11.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers (rev b1)
00:13.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers (rev b1)
00:15.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev b1)
00:16.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev b1)
00:1c.0 PCI bridge: Intel Corporation 631xESB/632xESB/3100 Chipset PCI Express Root Port 1 (rev 09)
00:1d.0 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #1 (rev 09)
00:1d.1 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #2 (rev 09)
00:1d.2 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #3 (rev 09)
00:1d.3 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #4 (rev 09)
00:1d.7 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset EHCI USB2 Controller (rev 09)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d9)
00:1f.0 ISA bridge: Intel Corporation 631xESB/632xESB/3100 Chipset LPC Interface Controller (rev 09)
00:1f.1 IDE interface: Intel Corporation 631xESB/632xESB IDE Controller (rev 09)
00:1f.2 IDE interface: Intel Corporation 631xESB/632xESB/3100 Chipset SATA IDE Controller (rev 09)
00:1f.3 SMBus: Intel Corporation 631xESB/632xESB/3100 Chipset SMBus Controller (rev 09)
01:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Upstream Port (rev 01)
01:00.3 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express to PCI-X Bridge (rev 01)
02:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E1 (rev 01)
02:02.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E3 (rev 01)
04:00.0 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Copper) (rev 01)
04:00.1 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Copper) (rev 01)
06:00.0 PCI bridge: Intel Corporation 80333 Segment-A PCI Express-to-PCI Express Bridge
06:00.2 PCI bridge: Intel Corporation 80333 Segment-B PCI Express-to-PCI Express Bridge
07:0e.0 RAID bus controller: Adaptec AAC-RAID
0a:00.0 PCI bridge: Intel Corporation 6702PXH PCI Express-to-PCI Bridge A (rev 09)
0c:01.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02)
[root@server kernels]#
[root@server ~]# lsmod
Module Size Used by
ip_conntrack_irc 11181 0
xt_conntrack 6876 0
xt_state 6544 16
ip_conntrack_ftp 11800 0
ipt_recent 13376 0
ipt_LOG 10781 0
xt_length 6312 0
xt_mac 6274 0
xt_multiport 7643 4
ipt_ttl 6266 0
xt_limit 6976 6
ipt_TOS 6555 14
ipt_ULOG 12126 0
ipt_TCPMSS 8276 1
ipt_owner 6335 0
ipt_ecn 6579 0
ip_conntrack 49498 4 ip_conntrack_irc,xt_conntrack,xt_state,ip_conntrack_ftp
ptpatch2008 7144 0
xt_tcpudp 7444 194
ipv6 248537 39
sunrpc 155556 1
iptable_filter 7336 1
iptable_mangle 7151 1
ip_tables 17800 2 iptable_filter,iptable_mangle
x_tables 19427 16 xt_conntrack,xt_state,ipt_recent,ipt_LOG,xt_length,xt_mac,xt_multiport,ipt_ttl,xt_limit,ipt_TOS,ipt_ULOG,ipt_TCPMSS,ipt_owner,ipt_ecn,xt_tcpudp,ip_tab les
dm_mirror 27216 0
dm_mod 60685 1 dm_mirror
button 11061 0
battery 14432 0
asus_acpi 20440 0
ac 9549 0
i2c_i801 12050 0
i2c_core 25366 1 i2c_i801
shpchp 40012 0
e1000 119987 0
floppy 61606 0
ext3 130212 6
jbd 61020 1 ext3
ata_piix 19728 0
libata 104369 1 ata_piix
aacraid 60341 7
usb_storage 66142 0
uhci_hcd 26859 0
ohci_hcd 23774 0
ehci_hcd 34026 0
sd_mod 24286 8
scsi_mod 136564 4 libata,aacraid,usb_storage,sd_mod
[root@server ~]# cat /etc/modprobe.conf
alias scsi_hostadapter usb-storage
alias eth0 e1000
alias eth1 e1000
alias scsi_hostadapter1 aacraid
alias scsi_hostadapter2 ata_piix
alias scsi_hostadapter3 usb-storage
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd
[root@server ~]#
Apache :: Awkward Delay / Hang While Using Proxy
Apr 11, 2013I am using apache proxypass to proxy to 4 different ports (java/jsp applications) with the following configurations (for each):
<VirtualHost *:80>
ProxyPreserveHost On
ProxyRequests Off
ServerName *****.org
ProxyPass / http://*****.org:8080/ retry=0
ProxyPassReverse / http://*****.org:8080/
</VirtualHost>
Everything seems work fine until an awkward delay / connection timeout occurs. The web application hangs for about 5 to 15 seconds and starts working normally after that period. It's certainly not the application's issue because everything is fine when using IP address to access it.
When I enabled the debug log in apache, I found out that every time the server seems to hang, the following error appears in the apache error log and the number of apache child processes keep on increasing (ps aux | grep apache).
[Thu Apr 11 10:20:41 2013] [debug] proxy_util.c(1818): proxy: grabbed scoreboard slot 4 in child 13208 for worker proxy:reverse
[Thu Apr 11 10:20:41 2013] [debug] proxy_util.c(1837): proxy: worker proxy:reverse already initialized
[Thu Apr 11 10:20:41 2013] [debug] proxy_util.c(1934): proxy: initialized single connection worker 4 in child 13208 for (*)
[Thu Apr 11 10:20:41 2013] [debug] proxy_util.c(1818): proxy: grabbed scoreboard slot 3 in child 13208 for worker http://*****.org:8080/
.....
Also, the access log (access.log) completely stops during that hang period.
This debug message keeps on repeating as long as Apache/web-application is not responding. The application starts to work normally after that duration and the number of apache child process decrease to the normal number.
Apache version : 2.2.16 (Debian)
OS : Debian GNU/Linux 6.0
root@server:~# apache2 -V
Server version: Apache/2.2.16 (Debian)
Server built: Nov 30 2012 08:58:36
[Code]....
Plesk 11.x / Linux :: Server Domain 302 Redirects To Hosted Domain - How To Undo
Nov 16, 2014When I hit my server's domain it redirects me to one of the hosted sites' domain with a 302 redirect. It used to return the default plesk server page. How can I cancel the redirect?
View 2 Replies View RelatedDomain Parking - Wildcard Domain Name Server (DNS)?
Nov 5, 2008We have a lot of unused domains that we'd like to setup domain parking for.
To keep it simple, we'd like to just change the namesevers to ns1.domainparking.com and ns2.domainparking.com (not real nameservers!) and the domains would then automatically show a simple web page.
We use cpanel servers and are wondering how easy this is to do? I've seem mention of wildcard dns? Is that the answer?
Domain Parking With Win2k3 Domain Name Server (DNS)?
Aug 3, 2007i have about 8 different domains i'd like to point to a nameserver (ns1./ns2.mydomain.com) on Win2k3 server, but i can't get them resolved through my nameserver without creating a manual forward lookup entry for each *parked* domain separatly..
Does anyone know how to resolve "parked" domains automatically on Win2k3 DNS??
I just can't find any answer for this, everything i've found required manual creation of lookup entries..
anyone?
Reverse Domain Name Server (DNS) ARPA For Domain On VPS
Jul 6, 2007I have a vps with dedicated ip's for my domain names.
I read that in order for mails coming from my server not be picked up as spam, i need to add reverse ip entries.
Now i have already added the glue nameserver records on my godaddy control panel,
ns1.mydomain.com -> 10.20.30.40
ns2.mydomain.com -> 10.20.30.41
But do i need to speak to the datacenter to add the reverse dns entries for my domain on their nameservers? What about if i host my nameservers offsite, but then have my webserver/mailserver etc inside the datacenter? Would i need to request the datacenter where the nameservers are hosted to add the reverse ip entries for the domain, and then the request the same from the datacenter for my web/mail servers to add the reverse entries?
Is it really required?
Domain Does Not Resolve :: Domain Name Server (DNS) Issues
Aug 14, 2008I've been having some DNS problems with one of my domains for quite some time now. The domain does not always resolve - some go days without being able to access the site.
I ran a simple BASH script to show what I mean. I replaced my domain with "mysite.net" and the IP with "xx.xx.xxx.xxx".
# for i in `seq 1 15`; do host mysite.net; done
mysite.net has address xx.xx.xxx.xxx
mysite.net mail is handled by 0 mysite.net.
Host mysite.net not found: 2(SERVFAIL)
mysite.net has address xx.xx.xxx.xxx
Host mysite.net not found: 2(SERVFAIL)
mysite.net has address xx.xx.xxx.xxx
Host mysite.net not found: 2(SERVFAIL)
mysite.net has address xx.xx.xxx.xxx
Host mysite.net not found: 2(SERVFAIL)
mysite.net mail is handled by 0 mysite.net.
mysite.net has address xx.xx.xxx.xxx
Host mysite.net not found: 2(SERVFAIL)
Host mysite.net not found: 2(SERVFAIL)
mysite.net has address xx.xx.xxx.xxx
Host mysite.net not found: 2(SERVFAIL)
mysite.net mail is handled by 0 mysite.net.
mysite.net has address xx.xx.xxx.xxx
mysite.net mail is handled by 0 mysite.net.
mysite.net has address xx.xx.xxx.xxx
mysite.net mail is handled by 0 mysite.net.
mysite.net has address xx.xx.xxx.xxx
mysite.net mail is handled by 0 mysite.net.
mysite.net has address xx.xx.xxx.xxx
Host mysite.net not found: 2(SERVFAIL)
mysite.net has address xx.xx.xxx.xxx
mysite.net mail is handled by 0 mysite.net.
mysite.net has address xx.xx.xxx.xxx
mysite.net mail is handled by 0 mysite.net.
mysite.net has address xx.xx.xxx.xxx
mysite.net mail is handled by 0 mysite.net.
mysite.net has address xx.xx.xxx.xxx
mysite.net mail is handled by 0 mysite.net.
Has anyone experienced a similar problem? I have gone over the DNS records countless times and see no problems. The site is hosted on my own dedicated server.
Howto Set A Domain Name Server (DNS) To A Domain
Jan 26, 2009I´ve a domain but haven´t set the DNS servers yet....now I get a free hosting and I wanted to associate the DNS servers to my domain but I don´t know how!!!
It would be great If you could help me...and let me know if you need more info..
Cpanel Domain Name Server (DNS) Setting For Email On 2 Seperate Server
Nov 7, 2009This is the scenario, domain.com are setup on server1, however server2 also has the same profile of domain.com as we use ns3 and ns4 using domain.com. This works fine with the nameserver setup on server2.
However I encounter problems as the emails from server2 won't reach server1 as there are duplicate profile on server2.
My question is how do I setup the DNS in cpanel/whm from server2 so the emails from server2 will reach server1?
Server1 (www.domain.com)
ns1.domain.com
ns2.domain.com
Server2
ns3.domain.com
ns4.domain.com
DNS Domain Name Server Manager In Windows Server 2008
Aug 28, 2009I have been searching everywhere trying to find a tutorial but It is not going anywhere. Basically I need to create 2 nameservers for Godaddy and pretty much so when i type http://mysite.com it goes to my site. I can access everything from http://myip and everything works. Now is there a step by step on how to actually do it in the DNS Manager? I need help like what IP address do I use is it the router ip? The external IP?
View 7 Replies View RelatedPrimary Server Using Script To Upload On 2nd Server Without A Domain
Oct 20, 2007i am currently with a host, hosting my important sites. I am now going to purchase some space from another host purely for storage purposes and bandwidth usage as they are within my budget.
Now i have my primary domain with my main host, and i would like to have a script or link from my current host which leads onto my 2nd host for users to upload their images or files. Now i have a problem, the second host that i will have will not have a registered domain attached to it, but rather it will be just storage.
I would prefer to have a subdomain from my primary host pointing to my second host. The problem is where will the subdomain point to? Or will it even work that way without having to purchase another domain?
How To Setup Domain Name Server For Multiple Server?
Sep 16, 2006I have 1 server so I setup dns as ns1.mydomain.com, ns2.mydomain.com ip address pointed to server1. So, now I just bought another server. Can I setup ns2.mydomain.com pointed to 2nd server. Also how to setup more servers ie. 10, 20 server because I can only set up to 6 dns in one domain name.
View 8 Replies View RelatedChange Domain Name Server (DNS) For Server Move
Jul 21, 2008Could someone tell me what I need to change in the DNS zone for when moving servers, to minimize downtime
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