Xen: DomU Crashing Frequently

Oct 3, 2008

I've been running 3 Xen servers for the last few months in a production environment, and facing a strange problem with one of them.

Server 1 and 2 run a couple of DomU's and are running just fine.

Server 3 runs one DomU and takes care of all the backups for the DomU's of Server 1 and 2
The DomU on Server 3 is crashing every night, right when the backups are being made.
DomU becomes inaccessible, but keeps appearing at xm list with state ------

When I try to connect to the console it wont let me connect. The only way to get the DomU back up is by using xm destroy and xm create again.

For the back-up I use NFS where the DomU on Server 3 is the host, and the other DomU's of Server 1 and 2 connect to it through an internal bridge.

Below you'll find some information about Server 3:

Hardware:
HP ProLiant DL380 G5
10Gb Memory
( 8 x 146G SAS10k in RAID 5 )

Dom0:
CentOS 5 kernel 2.6.18-92.1.10.el5xen
Booting params: dom0_mem=1024M

DomU:
CentOS 5 kernel 2.6.18-92.1.10.el5
Booting params: acpi=off clock=pit

The last qemu-dm log on Dom0:
char device redirected to /dev/pts/1
qemu_map_cache_init nr_buckets = 4000
shared page at pfn bffff
buffered io page at pfn bfffd
xs_read(/vm/a8af3ec4-19d4-774e-af65-0902374dc616/rtc/timeoffset): read error
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
Triggered log-dirty buffer switch
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
xs_write(/vm/a8af3ec4-19d4-774e-af65-0902374dc616/rtc/timeoffset, rtc/timeoffset): write error

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Server Crashing Frequently

May 1, 2008

this is getting out of control. I have a dedicated server that is "unmanaged" meaning, I manage it

I typically can make my way around a server and do most things - but in this case I'm stuck. I host a number of websites on this box and have went over a year with little problems. The past month or so it seems as though the server crashes daily or every other day. It will be running just fine, then all of a sudden the processes and loads will go out of control until the server is just unusable.

What do I need to provide here for you to be of any help to me? I watch the processes using "top -ci" and it's typically small output - but when it's getting ready to crash it's like a ton of processes get backed up and continue running.

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XEN: Create Debian 4 DomU On Top Of Centos 5.2 Dom0

Dec 16, 2008

I'm not a Debian user, so I want some advice how to install Debian 4 as guest OS on top of Centos 5.2 dom0.

Mostly on Google, there's a manual on Centos on top of Debian. I've tried to use the netinstall iso for debian and mount it on /var/www/html/debian and use it for remote install source. So far don't have any success on that.

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How Do I Setup A Ubuntu DomU Guest On A CentOS / Fedora Core XEN Server

Jul 27, 2008

how to install Ubuntu (either 7.10 or 8.04) as a XEN domU guest on a CentOS 5 / Fedora Core 8 XEN dom0 server?

I have tried installing Ubuntu as a fully virtualized guest, but the Ubuntu CD doesn't even bootup. I get the Linux bootloader, and that's it,it doesn't continue to boot. Odd.

When trying to install a Paravirtualized guest, I had to use the debootstrap method, but can't get it to boot up.

Quote:

xm create anya_zanet
Using config file "/etc/xen/anya_zanet".
Error: (2, 'Invalid kernel', 'xc_dom_find_loader: no loader found
')

This is the xen configuration:

Code:
kernel = "/boot/vmlinuz-2.6.23.1-42.fc8"
ramdisk = "/boot/initrd-2.6.23.1-42.fc8.img"
builder='linux'
memory = 256
name = "anya_zanet"
vcpus = 1
vif = [ 'bridge=xenbr0' ]
disk = [ 'phy:/dev/System/anya_zanet,hda1,w' , 'phy:/dev/System/anya_zanet,hda2,w' ]
root = "/dev/hda1 ro"
on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'

how to get Ubuntu working on a CentOS / Fedora Core XEN server?

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Jun 21, 2009

I have a VPS with following features: Dual Xeon, 512MB Ram (up to 1GB), CentOS.
Unfortunately MySQL is frequently down, about once per day, and it takes time to set up again. to change mysql config to resolve this issue?

my.cnf:

PHP Code:

[mysqld]
skip-bdb
max_connections = 250
max_user_connections = 30
thread_concurrency = 1

key_buffer = 128M
myisam_sort_buffer_size = 32M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 1M
record_buffer = 1M

max_allowed_packet = 8M

table_cache = 200
thread_cache_size = 64

wait_timeout = 10
connect_timeout = 10
interactive_timeout = 10
max_connect_errors = 10

query_cache_type = 1
query_cache_limit = 1M
query_cache_size = 8M

skip-locking
safe-show-database

#log-slow-queries = /var/log/mysqld.slow.log
#long_query_time = 2

[mysqld_safe]
open_files_limit = 8192

[mysqldump]
quick
max_allowed_packet = 16M

[myisamchk]
key_buffer = 64M
sort_buffer = 32M
read_buffer = 16M
write_buffer = 16M 

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Apache Down Frequently

Dec 25, 2008

I have a VPS with 2GB RAM. The load is always around 0.5 - 0.7. It's Xen VPS, and I see the VPS doesn't use swap yet. However, Apache is going down frequently. Might be 3-4 times per day, and DA informs me about the downtime when trying to restart Apache.
In apache error_log, I haven't seen any special error. Just few lines like this
Quote:

[Thu Dec 25 21:53:03 2008] [warn] RSA server certificate CommonName (CN) `localhost' does NOT match server name!?
[Thu Dec 25 21:53:03 2008] [warn] RSA server certificate CommonName (CN) `localhost' does NOT match server name!?
[Thu Dec 25 21:53:03 2008] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Thu Dec 25 21:53:04 2008] [warn] RSA server certificate CommonName (CN) `localhost' does NOT match server name!?
[Thu Dec 25 21:53:04 2008] [warn] RSA server certificate CommonName (CN) `localhost' does NOT match server name!?
[Thu Dec 25 21:53:04 2008] [notice] Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8b DAV/2 PHP/5.2.8 configured -- resuming normal operations

I wonder why Apache is going down frequently, and how to fix it?

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Jan 16, 2007

I have a cpanel server with 2GB of ram. For the last two weeks , we are experiencing problems with apache in the server. Apache goes down frequently in the server and we had to manually restart the service everytime. chkservd do nothing for a restart. I had
recompiled apache using easyapache script.

Strangely i can see some entries like the following in apache error logs

host: isc_socket_create: not enough free resources

I compiled it one more time but the errors still exist.

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Jun 10, 2007

I have a server from FDCservers

My server is down at least 2 times a day causing downtime of 10 minutes to hours!

Configuration:
Core2DUO E6600
1 GB RAM
400 GB HDD
100 mbit port
cPanel/WHM/Fantastico/Rvskin
CentOS 4.5 32 bit

They swapped the RAM many times but still it sisnt resolved

I asked PSM to look why it crashes, they said that its working fine and tweaked settings. Please open a ticket again if it goes down again.

I am not going to open a ticket again and again everytime when it goes down since I am not online everytime.

When it crashes(or whatever) it responds to ping requests but not to http ssh ftp or anything else including cPanel/WHm.

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Apr 28, 2009

This is the Strange problem i face. my blog goes down while the server is up, comes back automatically after some time.

I can access the Cpanel without a problem, can anyone tell whats wrong?

Code:

C:Documents and SettingsGaurish>ping [url]
Ping request could not find host [url] Please check the name
d try again.

C:Documents and SettingsGaurish>ping [url]
[url][67.228.104.181] with 32 bytes of data:

Reply from 67.228.104.181: bytes=32 time=495ms TTL=50
Reply from 67.228.104.181: bytes=32 time=468ms TTL=50
Reply from 67.228.104.181: bytes=32 time=500ms TTL=50
Reply from 67.228.104.181: bytes=32 time=515ms TTL=50

Ping statistics for 67.228.104.181:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 468ms, Maximum = 515ms, Average = 494ms
During this i don't change any setting, so less chance misconfiguration

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Jan 11, 2009

My Awstats is updating every other day and I would like it to up date daily.

I am in my third month of hosting and in about first 2 months, Awstats would update every day.

I have searched and read where it is possible to get Awstats to update manualy but it seems that my scenario isn't the same as everyone else's.

I am accessing my Awstats through CPanel and there is no way that I see to modify when Awstats updates.

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Jan 17, 2008

I am running shoutcast on a spare dedicated system, for some reason it has been buffering a little to often for my liking.

I am running 64 kbps for 300 listeners and buffering problems become frequent around 150 listeners.

Is there anyway I can reduce the frequent buffering (be it hardware or software doesnt matter).

Latency seems very high (1100ms)

Would the fact that the server has been running continuously for 6 days have anything to do with it?

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Oct 30, 2009

globichen can explain about this.

ping timeout happen frequently.
this is the 2nd time happen in a week

i've submit a ticket regarding about this
customer service replies with server is online.

i'm not bashing their service but frequently ping timeout really makes my business down lately.

Loading website takes a few min & even couldn't access to server due to ping timeout.

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Apr 11, 2008

Many a times websites hosted on my Red Hat Linux server would not open even though Apache and everthing else is up and running. When i hit reload on browser 4-5 times the website would load or i have to restart Apache and everything starts working normally.

Today when this problem resurfaced i did not restart Apache and looked for in apache logs and saw this strange entry in apache Error Log;

[client my.ip.xx.xx] script '/my/website/httproot/mdqt.php' not found or unable to stat

The above was in apache Error Log, above is my ip address, and i never requested a file named mdqt.php, in fact no file by the name mdqt.php even exist on my entire server.

I then looked for mdqt.php in error logs and saw several requests made for this file and from various IP addresses.

i understand this is what causes my http to die.

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Bad Page State In Process Apache2 (Server Reboots Frequently)

May 16, 2007

Code:
Kernel Version2.6.18-4-686 (SMP)
Distro Name Debian 4.0
Model Intel(R) Pentium(R) 4 CPU 2.40GHz
I've installed the default apache 2, mysql, php using aptitude.

The server load is not at all high, around 1-1.5 max. The apache processes running are at an avg 60-80. It has 1GB ram and Disk Swap usage is 0kB

My server keeps rebooting every now and then. These are the messages I get in the ssh session just before the reboot..

Code:
Message from syslogd@xxx at xxx
kernel: Bad page state in process 'apache2'
kernel: page:c17bc0a0 flags:0xc0000000 mapping:00800040 mapcount:0 count:0
kernel: Trying to fix it up, but a reboot is needed
kernel: Backtrace:

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Nov 2, 2009

Today on a server of mine mysql keeps crashing and I need to manually restart it over and over, the load as well keeps spiking quite high until I stop mysql for a few minutes. There isn't a extra load of traffic or anything as I have the same amount of users on several other servers doing more then this one.

How do I tell exactly whats happening from then how would I go about fixing it?

Basically it mysql crashes and needs to just be manually restarted via ssh.

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Jun 25, 2009

My web site keeps crashing for some reason like every 10 minutes. The site will be up for 10 minutes and then down for 10 minutes. Up for anotehr 10 minutes and then down for another 10 minutes.

The odd thing is that the server does not crash, the site itself does. I can access WHM during these periods of downtime and WHM says everything is perfect. All green check marks, low server load, low memory usage. Everything looks perfect.

On top of being able to access WHM during these periods of downtime, I can even access that green page from the IP, 123.456.789 (exampe ip) that says "Great success, Apache is working on your WHM/Cpanel server"

(this one: img34.imageshack.us/img34/749/greatsuccessw.jpg)

But as soon as I put in my account name after the IP (like 123.456.789/~account), the site crashes. And by crash I mean it goes super slow and then times out.

I don't understand what the problem is and the managed solutions support that I have is usually really good at this, but is also having trouble with this problem.

I'm not sure if this is relevant, but incase it helps I have vBulletin forums and a mySQL database backend. Also, the dedicated server is a linux server with Centos 5.3.

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Apache Keeps Crashing

Feb 25, 2008

I've been having problems for the past two weeks. Apache and MySQL kept crashing. I tweaked MySQL, and MySQL stopped crashing. But Apache still crashes, sometimes twice a day, sometimes once every few days. It's driving me crazy. It started around the same time I acquired a new customer, so it's possible the customer has some sort of script or something that is causing problems, but I'm not quite sure how to determine whether the problem is the server itself, or if it's the customer.

So here am I, asking you experts for whatever assistance you feel willing to render. Even if you only merely read it, I thank you for at the very least taking the time to read it. Thanks in advance for any and all assistance given. That being said, here's the information the "How To: Request help from the experts" sticky recommended giving. I also took the liberty of including httpd.conf and my.cnf. I apologize if that resulted in being too much information, and humbly ask a moderator to "white out", or so to speak, (or at least point out) the information that shouldn't be shown.

Linux OS: CentOS release 4.6 (Final)
Kernel Version: 2.6.9-023stab044.4-enterprise
Control Panel: Plesk 8.2.1
Hardware information: 20 GB storage, 256MB RAM, 1 TB bandwidth

Results of "php -v":

PHP 5.2.5 (cli) (built: Jan 19 2008 10:08:24)
Copyright (c) 1997-2007 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies
with the ionCube PHP Loader v3.1.32, Copyright (c) 2002-2007, by ionCube Ltd., and
with Xdebug v2.0.2-dev, Copyright (c) 2002-2007, by Derick Rethans
Results of "SELECT VERSION;" in MySQL:

Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1134
Server version: 5.0.54 Source distribution

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

mysql> SELECT VERSION();
+-----------+
| VERSION() |
+-----------+
| 5.0.54 |
+-----------+
1 row in set (0.00 sec)
Results of "ps auxf"

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 1628 608 ? Ss 12:41 0:00 init [3] ....

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Nov 12, 2008

I keep getting a segmentation fault after a few hours when I leave lighttpd on. It doesn't seem like much resources are being used and its serving about 60mbit/s. There's nothing in the error or log file.

I'm using CentOS 2.6.18-92.1.13.el5
and
lighttpd-1.5.0-r1992
Here's the config:
server.modules = (
"mod_access",
"mod_trigger_b4_dl",
"mod_status",
"mod_proxy_core",
"mod_proxy_backend_fastcgi",
"mod_uploadprogress"
)
upload-progress.progress-url = "/progress"
server.network-backend = "gthread-aio"
server.max-fds = 15000
server.max-connections = 10000
server.event-handler = "linux-sysepoll"
I've actually been having this issue since I've moved to lighttpd 1.5, 1.4 was working fine but I need the features in 1.5. I've tried changing the event handler and network backend to no avail.

How can I at least find out what's causing the error?

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Oct 19, 2008

I've experienced two episodes of cPanel/WHM not loading or working twice within the past 2 weeks.

Suddenly cPanel/WHM fails to load, but web service, provided by Litespeed (only installed today) continues to serve and mysql is unaffected, just cPanel/WHM.

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Jul 19, 2008

System specs:

Intel Celeron Proccesor
256 RAM (yeah I know...)
Debian Etch
Joomla! 1.5

Okay... so, here goes.

Recently, I have switched from Siteground hosting services and everything was fine. Now I have changed over to a dedicated server that resides at my house. I'm routing DNS through FreeDNS (freedns.afraid.org).


For a week or two, the server was fine. Recently, we started working on the website on the new server (posting new articles, changing the theme, adding some plugins, etc.) and it's steadily gotten worse and worse about, when we save changes to something, or post an article, the website will go offline. Eventually, the website will come back.

My question is: What is causing this? The actual server isn't shutting off, so It has to be something between my modem and the user. Is my modem just shutting off because it's overloaded? (that seems sort of improbable) Or, is it a DNS issue? (I have a Dynamic DNS system set up that is working fine)

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Server Keeps Crashing ...

Feb 27, 2008

My server keeps crashing and this is the last log. Can you help me to find out whats the problem here.

Feb 27 11:41:55 Xxxxxxxx kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Feb 27 11:41:55 Xxxxxxxx kernel: ata1.00: (BMDMA stat 0x25)
Feb 27 11:41:55 Xxxxxxxx kernel: ata1.00: cmd 25/00:00:bf:eb:0f/00:04:04:00:00/e0 tag 0 cdb 0x0 data 524288 in
Feb 27 11:41:55 Xxxxxxxx kernel: res 51/40:f6:c9:ec:0f/40:02:04:00:00/e0 Emask 0x9 (media error)
Feb 27 11:41:55 Xxxxxxxx kernel: ata1.00: configured for UDMA/133
Feb 27 11:41:55 Xxxxxxxx kernel: ata1: EH complete
Feb 27 11:41:56 Xxxxxxxx kernel: SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
Feb 27 11:41:56 Xxxxxxxx kernel: sda: Write Protect is off
Feb 27 11:41:57 Xxxxxxxx kernel: SCSI device sda: drive cache: write back
Feb 27 12:11:26 Xxxxxxxx kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Feb 27 12:11:26 Xxxxxxxx kernel: ata1.00: (BMDMA stat 0x24)
Feb 27 12:11:28 Xxxxxxxx kernel: ata1.00: cmd 25/00:08:47:83:a6/00:00:1f:00:00/e0 tag 0 cdb 0x0 data 4096 in
Feb 27 12:11:28 Xxxxxxxx kernel: res 51/40:00:4e:83:a6/40:00:1f:00:00/e0 Emask 0x9 (media error)
Feb 27 12:11:28 Xxxxxxxx kernel: ata1.00: configured for UDMA/133
Feb 27 12:11:28 Xxxxxxxx kernel: ata1: EH complete
Feb 27 12:11:28 Xxxxxxxx kernel: SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
Feb 27 12:11:28 Xxxxxxxx kernel: sda: Write Protect is off
Feb 27 12:11:28 Xxxxxxxx kernel: SCSI device sda: drive cache: write back
Feb 27 12:11:51 Xxxxxxxx kernel: ** RABHIT ** IN=eth0 OUT= MAC=00:30:48:90:ea:50:00:17:cb:4b:9a:00:08:00 SRC=83.143.15.168 DST=xx.xx.xx.xx LEN=40 TOS=0x00 PREC=0x00 TTL=45 ID=3304 PROTO=TCP SPT=113 DPT=57956 WINDOW=0 RES=0x00 ACK RST FIN URGP=0
Feb 27 12:14:07 Xxxxxxxx smartd[6368]: Device: /dev/sda, 95 Currently unreadable (pending) sectors
Feb 27 12:14:07 Xxxxxxxx smartd[6368]: Device: /dev/sda, 21 Offline uncorrectable sectors
Feb 27 12:31:44 Xxxxxxxx named[2355]: lame server resolving '245.236.229.195.in-addr.arpa' (in '236.229.195.in-addr.arpa'?): 194.170.1.6#53
Feb 27 12:31:44 Xxxxxxxx pure-ftpd: (?@204.13.168.174) [INFO] Logout.
Feb 27 12:31:58 Xxxxxxxx named[2355]: lame server resolving '217.236.229.195.in-addr.arpa' (in '236.229.195.in-addr.arpa'?): 194.170.1.99#53
Feb 27 12:33:15 Xxxxxxxx kernel: ** RABHIT ** IN=eth0 OUT= MAC=00:30:48:90:ea:50:00:17:cb:4b:9a:00:08:00 SRC=78.172.82.50 DST=xx.xx.xx.xx LEN=40 TOS=0x00 PREC=0x00 TTL=46 ID=39216 PROTO=TCP SPT=113 DPT=43432 WINDOW=0 RES=0x00 ACK RST FIN URGP=0
Feb 27 12:34:38 Xxxxxxxx snmpd[27298]: Connection from UDP: [204.13.168.174]:41549
Feb 27 12:34:38 Xxxxxxxx snmpd[27298]: Received SNMP packet(s) from UDP: [204.13.168.174]:41549
Feb 27 12:34:38 Xxxxxxxx snmpd[27298]: Connection from UDP: [204.13.168.174]:41549
Feb 27 12:34:38 Xxxxxxxx snmpd[27298]: Connection from UDP: [204.13.168.174]:41549
Feb 27 12:34:38 Xxxxxxxx snmpd[27298]: Connection from UDP: [204.13.168.174]:41551
Feb 27 12:34:38 Xxxxxxxx snmpd[27298]: Received SNMP packet(s) from UDP: [204.13.168.174]:41551
Feb 27 12:34:38 Xxxxxxxx snmpd[27298]: Connection from UDP: [204.13.168.174]:41551
Feb 27 12:34:40 Xxxxxxxx last message repeated 10 times
Feb 27 12:35:16 Xxxxxxxx snmpd[27298]: Connection from UDP: [204.13.168.174]:41880
Feb 27 12:35:16 Xxxxxxxx snmpd[27298]: Received SNMP packet(s) from UDP: [204.13.168.174]:41880
Feb 27 12:35:16 Xxxxxxxx snmpd[27298]: Connection from UDP: [204.13.168.174]:41880

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Feb 19, 2007

I cannot figure out why my server is always dead when i wake up most mornings.

I am trying to figure out why my server is crashing nearly every night between 12am and 9am eastern time. When it crashes it is down all night until i wake up and have to reboot the damn server. I am wondering if cron jobs are taking up alot of the cpu or something because the server load isn't that much. here is my specs:

Server:
Softlayer
2 CPUS - dual core xenon 3.0mhz
500gb hd
2 gb DDR memory

Softare:
WHM/Control Panel with Ipanel back admin

Sites:
I am currently hosting 4,500 sites on the server.

The server load usually stays below 1 and is blazing fast. I just cannot figure out why it crashes when i sleep. I dont know if there is a virus or what. PHP mail is disabled so there would be no spamming crashing it. Here is my cron jobs:

17 2 * * * /scripts/upcp
0 1 * * * /scripts/cpbackup
*/15 * * * * /usr/local/cpanel/whostmgr/bin/dnsqueue > /dev/null 2>&1
2,58 * * * * /usr/local/bandmin/bandmin
0 0 * * * /usr/local/bandmin/ipaddrmap
31 5 * * * /usr/local/cpanel/whostmgr/docroot/cgi/cpaddons_report.pl --notify
56 18 * * * cd /usr/local/cpanel/whostmgr/docroot/cgi/fantastico/scripts/ ; /usr/local/cpanel/3rdparty/bin/php cron.php > /d$
0 8 * * * /root/homedb_update.sh > /dev/null 2>&1
0 6 * * * /scripts/exim_tidydb > /dev/null 2>&1
*/5 * * * * /usr/local/cpanel/bin/dcpumon >/dev/null 2>&1

I dont know much about cron jobs as I am new to this server hosting thing and just bought an established company. Maybe one of the cron jobs is causing it to crash in the middle of the night?

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Feb 22, 2007

After upgrading to php 4.4.5 from 4.4.4 I am getting this error in modern bill

[23126] EACCELERATOR: PHP crashed on opline 245 of session_register() at /home/user/public_html/modernbill/include/functions.inc.php:99

Anyone face this issue before? I've always used both EA and MB.

[eAccelerator]
zend_extension="/usr/lib/php/eaccelerator/eaccelerator.so"
eaccelerator.shm_size="4096"
eaccelerator.cache_dir="/tmp/eaccelerator"
eaccelerator.enable="1"
eaccelerator.optimizer="3"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="1"
eaccelerator.keys="shm_and_disk"
eaccelerator.sessions="shm_and_disk"
eaccelerator.content="shm_and_disk"

[Zend]
zend_extension_manager.optimizer=/usr/local/Zend/lib/Optimizer-3.2.2
zend_extension_manager.optimizer_ts=/usr/local/Zend/lib/Optimizer_TS-3.2.2
zend_optimizer.version=3.2.2

zend_extension=/usr/local/Zend/lib/ZendExtensionManager.so
zend_extension_ts=/usr/local/Zend/lib/ZendExtensionManager_TS.so

.htaccess file:

<Files .htaccess>
order allow,deny
deny from all
</Files>

DirectoryIndex index.php
Options -Indexes

php_value "magic_quotes_gpc" "1"
php_value "register_globals" "1"
php_value "error_reporting" "2039"

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My Kernel Keeps Crashing

Nov 18, 2007

new server, cent os 5

the damn kernal keeps dying every other day.

I've disabled everything from xcache to monitoring software, etc, and it's still doing it.

here's the output from my ssh session i had open when it died.

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f8c61b15>] cifs_writepages+0x2c9/0x56c [cifs]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0453c09>] get_page_from_freelist+0x96/0x310

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0453eda>] __alloc_pages+0x57/0x27e

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f88959ea>] ext3_readpages+0x0/0x15 [ext3]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f88959ea>] ext3_readpages+0x0/0x15 [ext3]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c045532d>] __do_page_cache_readahead+0x126/0x1c6

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f8896546>] ext3_get_block+0x0/0xbd [ext3]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04547ab>] do_writepages+0x20/0x32

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0450536>] __filemap_fdatawrite_range+0x65/0x70

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c045072f>] filemap_fdatawrite+0x12/0x16

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f8c5ffb3>] cifs_flush+0x16/0x42 [cifs]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04690f0>] filp_close+0x2f/0x54

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c042512c>] put_files_struct+0x65/0xa7

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04260da>] do_exit+0x229/0x746

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c042666d>] sys_exit_group+0x0/0xd

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0403eff>] syscall_call+0x7/0xb

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: Oops: 0003 [#2]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: SMP

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: CPU: 1

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: EIP is at print_trace_stack+0x0/0x3

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: eax: c0613ddf ebx: eba5f000 ecx: c066231c edx: c063c336

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: esi: 00000000 edi: eba5e000 ebp: c0613ddf esp: eba5eb24

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: ds: 007b es: 007b ss: 0068

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: Process gzip (pid: 22837, ti=eba5e000 task=eefbc550 task.ti=eba5e000)

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: Stack: c040502c 00000000 c0613ddf 00000018 00000000 c0613ddf c0405046 c066231c

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: c0613ddf eba5ec9b c04050e2 c0613ddf c0613ca4 c0613ddf eba5ec04 eba5ec38

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: 00000002 00210016 eba5ec04 eba5ec38 c040520f c0613ddf c0613dd3 00000001

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: Call Trace:

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c040502c>] dump_trace+0x8c/0x96

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0405046>] show_trace_log_lvl+0x10/0x20

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04050e2>] show_stack_log_lvl+0x8c/0x94

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c040520f>] show_registers+0x125/0x191

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0404c44>] print_trace_stack+0x0/0x3

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0405411>] die+0x196/0x296

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c05fd66f>] do_page_fault+0x3ea/0x4b8

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c05fd285>] do_page_fault+0x0/0x4b8

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0404a71>] error_code+0x39/0x40

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0404c44>] print_trace_stack+0x0/0x3

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c040502c>] dump_trace+0x8c/0x96

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0415a96>] do_flush_tlb_all+0x0/0x5a

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0405046>] show_trace_log_lvl+0x10/0x20

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0405540>] show_trace+0xa/0xc

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c040563d>] dump_stack+0x15/0x17

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0415a96>] do_flush_tlb_all+0x0/0x5a

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c044a0b7>] softlockup_tick+0x98/0xa6

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c042cc98>] update_process_times+0x39/0x5c

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04176ec>] smp_apic_timer_interrupt+0x5c/0x64

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04049bf>] apic_timer_interrupt+0x1f/0x24

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0415a96>] do_flush_tlb_all+0x0/0x5a

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0415921>] smp_call_function+0x99/0xc3

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0415a96>] do_flush_tlb_all+0x0/0x5a

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0415a96>] do_flush_tlb_all+0x0/0x5a

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0427b46>] on_each_cpu+0x10/0x1f

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04159d7>] flush_tlb_all+0x13/0x15

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0459195>] kmap_high+0x90/0x18f

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0454dfe>] test_clear_page_dirty+0xc4/0xe6

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f8c61b15>] cifs_writepages+0x2c9/0x56c [cifs]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0453c09>] get_page_from_freelist+0x96/0x310

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0453eda>] __alloc_pages+0x57/0x27e

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f88959ea>] ext3_readpages+0x0/0x15 [ext3]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f88959ea>] ext3_readpages+0x0/0x15 [ext3]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c045532d>] __do_page_cache_readahead+0x126/0x1c6

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f8896546>] ext3_get_block+0x0/0xbd [ext3]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04547ab>] do_writepages+0x20/0x32

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0450536>] __filemap_fdatawrite_range+0x65/0x70

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c045072f>] filemap_fdatawrite+0x12/0x16

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<f8c5ffb3>] cifs_flush+0x16/0x42 [cifs]

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04690f0>] filp_close+0x2f/0x54

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c042512c>] put_files_struct+0x65/0xa7

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c04260da>] do_exit+0x229/0x746

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c042666d>] sys_exit_group+0x0/0xd

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: [<c0403eff>] syscall_call+0x7/0xb

Message from syslogd@sv03 at Sun Nov 18 09:00:55 2007 ...
sv03 kernel: Recursive die() failure, output suppressed

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I run a drupal site on a VPS running Lighttpd with 128MB ram and 15GB disk space. Every so often the server crashes and I have no access to even reboot via the shell, I have to get my host to reboot the VPS. They say its most likely due to the server running out of memory. I would have no more than 5 users plus 5 guests online at the same time. So my question is this...

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Quote:

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this server is crashing after a few hours... it just got frozen... and after rebooted the server, i was looking at the /var/log/message logs and saw this ( you will see when system restart after the crash ):

Code:
Feb 20 17:35:04 server kernel: grsec: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:13280]
uid/euid:48/48 gid/egid:48/48, parent /us
r/sbin/httpd[httpd:6180] uid/euid:48/48 gid/egid:48/48
Feb 20 17:41:40 server kernel: grsec: From 190.73.138.68: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:27459]
uid/euid:48/48 gid/eg
id:48/48, parent /usr/sbin/httpd[httpd:20166] uid/euid:48/48 gid/egid:48/48
Feb 20 17:45:03 server kernel: grsec: signal 7 sent to /usr/bin/php[php:31710]
uid/euid:0/0 gid/egid:0/0, parent /bin/bash[sh:8963] uid/euid:0/0
gid/egid:0/0
Feb 20 17:48:41 server kernel: grsec: From 87.219.205.218: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:11897]
uid/euid:48/48 gid/e
gid:48/48, parent /usr/sbin/httpd[httpd:8152] uid/euid:48/48 gid/egid:48/48
Feb 20 17:51:04 server kernel: grsec: From 85.58.139.135: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:28508]
uid/euid:48/48 gid/eg
id:48/48, parent /usr/sbin/httpd[httpd:19918] uid/euid:48/48 gid/egid:48/48
Feb 20 17:51:58 server kernel: grsec: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:15615]
uid/euid:48/48 gid/egid:48/48, parent /us
r/sbin/httpd[httpd:2482] uid/euid:48/48 gid/egid:48/48
Feb 20 17:52:08 server kernel: grsec: From 166.114.104.42: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:4662]
uid/euid:48/48 gid/eg
id:48/48, parent /usr/sbin/httpd[httpd:24468] uid/euid:48/48 gid/egid:48/48
Feb 20 17:52:38 server kernel: grsec: From 189.175.50.103: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:12497]
uid/euid:48/48 gid/e
gid:48/48, parent /usr/sbin/httpd[httpd:32213] uid/euid:48/48 gid/egid:48/48
Feb 20 17:54:32 server kernel: grsec: From 83.53.142.7: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:18556]
uid/euid:48/48 gid/egid
:48/48, parent /usr/sbin/httpd[httpd:22809] uid/euid:48/48 gid/egid:48/48
Feb 20 17:55:04 server kernel: grsec: signal 7 sent to /usr/bin/php[php:29694]
uid/euid:502/502 gid/egid:502/502, parent /bin/bash[sh:30003]
uid/euid:502/502 gid
/egid:502/502
Feb 20 18:00:54 server kernel: grsec: From 189.141.26.82: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:10817]
uid/euid:48/48 gid/eg
id:48/48, parent /usr/sbin/httpd[httpd:13549] uid/euid:48/48 gid/egid:48/48
Feb 20 18:01:07 server kernel: grsec: signal 7 sent to /usr/bin/php[php:20901]
uid/euid:0/0 gid/egid:0/0, parent /bin/bash[sh:12242] uid/euid:0/0
gid/egid:0/0
Feb 20 18:03:06 server kernel: grsec: signal 7 sent to /usr/bin/php[php:9696]
uid/euid:502/502 gid/egid:502/502, parent /bin/bash[sh:23721]
uid/euid:502/502 gid/
egid:502/502
Feb 20 18:03:29 server kernel: grsec: From 68.26.197.159: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:917]
uid/euid:48/48 gid/egid
:48/48, parent /usr/sbin/httpd[httpd:20771] uid/euid:48/48 gid/egid:48/48
Feb 20 18:04:43 server kernel: grsec: From 87.219.88.132: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:10750]
uid/euid:48/48 gid/eg
id:48/48, parent /usr/sbin/httpd[httpd:4130] uid/euid:48/48 gid/egid:48/48
Feb 20 18:05:04 server kernel: grsec: From 189.167.128.26: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:14515]
uid/euid:48/48 gid/e
gid:48/48, parent /usr/sbin/httpd[httpd:2598] uid/euid:48/48 gid/egid:48/48
Feb 20 18:07:05 server kernel: grsec: signal 7 sent to /usr/bin/php[php:29589]
uid/euid:0/0 gid/egid:0/0, parent /bin/bash[sh:7958] uid/euid:0/0
gid/egid:0/0
Feb 20 18:08:31 server kernel: grsec: From 88.64.181.89: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:15335]
uid/euid:48/48 gid/egi
d:48/48, parent /usr/sbin/httpd[httpd:27788] uid/euid:48/48 gid/egid:48/48
Feb 20 18:08:43 server kernel: grsec: From 201.244.116.46: signal 11 sent
to /usr/www/htdocs/mywebsite.com_cgi/script/out.cgi[out.cgi:15217]
uid/euid:48/48 gid/e
gid:48/48, parent /usr/sbin/httpd[httpd:29545] uid/euid:48/48 gid/egid:48/48
Feb 20 18:17:34 server syslogd x.x.x: restart.
Feb 20 18:17:34 server syslog: Iniciaci&#65533; de syslogd succeeded
Feb 20 18:17:34 server kernel: klogd x.x.x, log source = /proc/kmsg started.
Feb 20 18:17:34 server kernel: Linux version 2.x.xxgrs-bipiv-ipv4
(root@kernel.myserver.net) (gcc version xxxx) #1 SMP Tue Jan 31 17:34:40 CET 2006
Feb 20 18:17:34 server kernel: BIOS-provided physical RAM map:
Feb 20 18:17:34 server kernel: BIOS-e820: 0000000000000000 - 000000000009c400
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Feb 20 18:17:34 server kernel: BIOS-e820: 000000000009c400 - 00000000000a0000
(reserved)
Feb 20 18:17:34 server kernel: BIOS-e820: 00000000000ea070 - 0000000000100000
(reserved)
Feb 20 18:17:34 server kernel: BIOS-e820: 0000000000100000 - 000000007
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This is a fedora core server, xeon 3.2 GHZ x 4 procs using about 25 MBits per day.

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Feb 16 09:52:13 server kernel: loop: loaded (max 8 devices)
Feb 16 09:52:16 server kernel: kjournald starting. Commit interval 5 seconds
Feb 16 09:52:16 server kernel: EXT3-fs warning: checktime reached, running e2fsck is recommended
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From the error log, i'm showing:

Quote:

[emerg] (12)Cannot allocate memory: couldn't grab the accept mutex
[alert] Child 3208 returned a Fatal error.../nApache is exciting!
[emerg] (43)Identifier removed: couldn't grab the accept mutex
[emerg] (43)Identifier removed: couldn't grab the accept mutex
[emerg] (43)Identifier removed: couldn't grab the accept mutex
[emerg] (43)Identifier removed: couldn't grab the accept mutex
[emerg] (43)Identifier removed: couldn't grab the accept mutex
[emerg] (43)Identifier removed: couldn't grab the accept mutex
[emerg] (43)Identifier removed: couldn't grab the accept mutex
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[emerg] (22)Invalid argument: couldn't release the accept mutex

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