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
ADVERTISEMENT
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.
View 6 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.
OpenVZ 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?
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]....
How To Check IP If It Can See My Server
Apr 10, 2009I have one client who cannot see my server and all domains on it. I;ve checked if his IP is block or not and I didn't see his IP on the apf deny host file. How to you check IP if it can see my server? I just want to make sure before calling the ISP.
View 3 Replies View RelatedHow To Check Connections To My Server
Jun 24, 2009There use to be a thread on here but because of the wht hack, it didn't get saved...so now I can't go back to it.
It was a command in ssh that printed out a number of connections. Like 12,000 or something.
HDD Check On Dedicated Server
Apr 1, 2009What is the best way to check the HDD on new Dedicated server?
I would like to see if there is a bad sectors, etc.
fsck? or ? what is the full command that would do the job the best.
OS is Centos.
Check Server For Dos Attack
May 17, 2009How can check server for dos/ddos/syn attack?
Because my server load is high, perfromance is low, but i dont have any high process.
Check Domains With Different IPs On Same Server
Jun 17, 2009I'm not sure where to ask this but probably this section is the closest. I'm sorry if I use the wrong section.
Anyway I was wondering about checking using a reverse ip address tool which is available for free on the internet.
It seems that anyone can just check other domains which share the same IP address on a server.
However, I have a question.
Is it possible for anyone to check other domains which have different and unique IP addresses (for each domain) BUT all reside on a same server?
(meaning the person who is searching this only checks using one IP address/domain name to find out other domain names that reside on the SAME server)
Is there a 'free tool' out there that is capable of checking this?
How Can I Check Out Server Stability?
Sep 15, 2009How can I check out server stability of the hosting company?
I mean hostingsource company, their servers seem nice for me and I'd like to know more of their reliability and scalability.
How To Check Ports In Server
May 16, 2008i have problem with ports in server
how may i check ports?
for example 37549,53377,17235 and ...
i want know this ports are AVAILABLE or no
How Can I Check Uptime On My Server
Aug 31, 2007How can I check uptime or how to check downtime on my server?My members told me that they can not login to my site and it shows: Page can not found or Sever not found.
View 14 Replies View RelatedBatch Name Server Check
Dec 31, 2007i want to check in a batch if my client's domain changed name server or not. Are there are tools / script available for that?
View 5 Replies View RelatedCheck My Server Speed
Jul 3, 2007I have two servers one from hostmysite and other one is from 15minute server, I would like to know which one is faster, I have a dedicated server from 15minuteserver, but sometime I get slow speed I am not really sure which one is faster.
test two Ips and let me know.
76.12.21.39
216.118.117.165
How To Check My Server Security
Sep 1, 2007i have a dedicated server , some one else made the security for me, how could to be sure of its security? how could to be sure of all php functions contain risk are closed or disabled? how could to be sure of there are not any security gap?
way to understand and implement the steps.
Check If IP Is Blacklisted On Server
Jan 4, 2007One of our customers has reporting not being able to access any sites hosted on our server. He is using a cable connection with a static IP number . He is able to access all other web sites on the Internet, he just can't access the ones hosted on our network.
Do you have any ideas on why this could be occuring, or if there is something on the server which could have blacklisted his static IP, preventing him access.
How To Check The Type Of HD In Your Server
Mar 13, 2007I recently purchased a new server. It is supposed to have a 250G SATA II HD.
However, I have my suspicion that it could be a SCSI HD (not that it's bad, but I just want to check).
Is there a SSH command that tells you the type of HD on your server?
I tried fdisk -| , but it doesn't really say whether it's a SATA2 or SCSI
Could I Check If Any Rsync Setting On My Server?
Apr 6, 2009my server is centos,
i want to know the rsync setting,
could i check if any rsync setting on my server?
How To Check Service On Windows Server
Jul 15, 2009What's best software for check services under windows server and alert when anything work wrong ?
View 7 Replies View Related
