DNS Server Crashed - Rebooting Has No Effect
Oct 25, 2008
I'm hosting proxy sites on my vps and untill yesterday my proxy worked fine with no problems at all.
But while going trough my server graphs I found it odd that I had 0 bandwidth since the middle of yesterday.. I first supposed that this was due school's out [url]but this wasn't the reason I found out!
I tried testing one of my proxies to see if it was still working, but with any URL I try to visit I get:
The requested resource could not be loaded. libcurl returned the error: Couldn't resolve host 'www.google.com'
I suppose the DNS server crashed?
I already restarted the VPS 3 times including the DNS Server.
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Jul 19, 2009
I rebooted the srever
Code:
[root@server50 log]# date
Sun Jul 19 14:48:43 CDT 2009
[root@server50 log]# reboot
Broadcast message from root (pts/1) (Sun Jul 19 14:48:45 2009):
The system is going down for reboot NOW!
[root@server50 log]# uptime
14:49:02 up 47 days, 31 min, 1 user, load average: 0.07, 0.10, 0.09
[root@server50 log]# date
Sun Jul 19 14:58:11 CDT 2009
[root@server50 log]#
But server is not rebooting. Look like server need a hard reboot. Have anyonce faced this problem? why server is not rebooting?
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Oct 1, 2007
I suspect that my machine keep rebooting itself judging it's online for a while with the result of my ping that I can ping my machine for less than 3 minutes and then it goes offline afterward.
I've checked with the datacenter found my IP is clean and fine.
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Apr 27, 2007
I've had this problem for a while. My HTTP will stop functioning, so I attempt to restart it via SSH. I restart it, yet it doesn't fix the problem. So I reboot the server via SSH. I wait 5-10 minutes and the server STILL isnt up. Can't login via SSH or anything.
So every time I have to tell my host to manually reboot the server. I've had apache recompiled multiple times, but I don't think that's the issue.
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Mar 9, 2007
my linux server crashed today. I found these are the last line in the log
file just before i crashed.
Mar 8 07:21:00 myserver xinetd[5376]: warning: can't get client address:
Connection reset by peer
Mar 8 07:21:13 myserver xinetd[5395]: warning: can't get client address:
Connection reset by peer
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Aug 14, 2007
I've been with 3 dedicated hosts since 2005 and my sever experienced the first ever crash yesterday. I wanna know if any of you have experienced a crash once and not have it happen again after that time. As this is the first occurence, I'm feeling uneasy about the server stability.
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Jul 4, 2015
After rebooting my server, my websites are no longer working.
If I access the plesk machine on the local network by it's hostname, the default Plesk page shows as expected. Everything on 8443 works too.
All hosted sites do not work. FTP DOES work. This seems limited to an http problem of some sort.
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Jan 13, 2008
about a video sharing website.
I found phpmotion [url] and thinking about using this script, not only it is free but also it has the funtion that alow direct transfer video files from youtube to my server. Moreover, the phpmotion community is lovely.
The problem is that my hosting provider said this script is bad.
Quote:
While it will run on our servers I have heard nothing but bad things
about this software on our servers. For quite a while it has caused
issues to the point of crashing our servers but just recently (in the
last couple days) we have found ways to put limits on our systems which
should effect other programs/processes which will prevent this software
from crashing our servers so whether or not this would be ok to run on
our servers is a big *maybe* Alot of the issues appear to be related to
the fact the software runs php by executing it via shell using the php
executable which isn't really good considering that on our servers it
will always make it use php4 which might not be what your site is
running. PHPMotion is pretty much the only software I have heard
discussed and has caused major issues on our servers so if you could
avoid it I would definitely suggest you do! If you asked me about any
software which is reported to have/cause problems on our servers without
even mentioning phpmtion I would have answered phpmotion as that is the
only one I have heard of which causes tons of issues.
my questions are:
1. Do you have the same experiences with phpmotion?
2. How can I reduce the problem?
3. If phpmotion is really bad, which video sharing script should be recommended?
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Jan 27, 2007
Does anyone know of any services that can help retrieve data from a crashed server. The server is managed but the support are saying that they are having problems retriving the data. The server had an os reload and they can't slave the old disk.
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Mar 2, 2007
I have a crashed HD that I want to recover the data. I wonder if there is any method or software out there that can do this for me.
The hard drive is installed with centos and uses ext3 filesystem.
I have tried doing a mount, not if it is done correctly, but I only see "lost+found" on the hard drive.
Usually when this happens on my hard drive w/ windows, I use some data recovery software to extract the data. I don't know which software will do this for me on an ext3 filesystem running centos.
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Mar 23, 2007
Today my server just crashed instantly... It was running fine with a load of 0.12 but then it went down all the sudden. After a reboot I checked the /var/log/messages file and saw this:
Code:
Mar 23 15:57:00 alpha kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000020
Mar 23 15:57:00 alpha kernel: printing eip:
Mar 23 15:57:00 alpha kernel: c017292b
Mar 23 15:57:00 alpha kernel: *pde = 2085d001
Mar 23 15:57:00 alpha kernel: Oops: 0000 [#1]
Mar 23 15:57:00 alpha kernel: SMP
Mar 23 15:57:00 alpha kernel: Modules linked in: ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ipt_LOG ipt_limit ipt_multiport ipt_state ip_conntr
ack ipt_owner ipt_REJECT iptable_filter ip_tables autofs4 i2c_dev i2c_core sunrpc md5 ipv6 dm_mirror dm_mod button battery ac uhci_hcd ehci_hcd e1000 floppy
ext3 jbd ata_piix libata sd_mod scsi_mod
Mar 23 15:57:00 alpha kernel: CPU: 0
Mar 23 15:57:00 alpha kernel: EIP: 0060:[<c017292b>] Not tainted VLI
Mar 23 15:57:00 alpha kernel: EFLAGS: 00010246 (2.6.9-42.0.3.ELsmp)
Mar 23 15:57:00 alpha kernel: EIP is at dnotify_flush+0xe/0x70
Mar 23 15:57:00 alpha kernel: eax: c0446c40 ebx: ca05dd80 ecx: 0046ef00 edx: f1d95300
Mar 23 15:57:00 alpha kernel: esi: 00000000 edi: ca05dd80 ebp: f1d95300 esp: eb3f3fa0
Mar 23 15:57:00 alpha kernel: ds: 007b es: 007b ss: 0068
Mar 23 15:57:00 alpha kernel: Process httpd (pid: 28057, threadinfo=eb3f3000 task=efaf03b0)
Mar 23 15:57:00 alpha kernel: Stack: ca05dd80 00000220 f1d95300 eb3f3000 c015a7e5 0000020f bff65b64 bff65af0
Mar 23 15:57:00 alpha kernel: c02d47cb 0000020f 0046eff4 08cd4e6c bff65b64 bff65af0 bff615b8 00000006
Mar 23 15:57:00 alpha kernel: c02d007b 0000007b 00000006 0032a7a2 00000073 00000246 bff61598 0000007b
Mar 23 15:57:00 alpha kernel: Call Trace:
Mar 23 15:57:00 alpha kernel: [<c015a7e5>] filp_close+0x49/0x5f
Mar 23 15:57:00 alpha kernel: [<c02d47cb>] syscall_call+0x7/0xb
Mar 23 15:57:00 alpha kernel: [<c02d007b>] packet_rcv+0x17e/0x307
Mar 23 15:57:00 alpha kernel: Code: 00 89 c3 85 d2 74 0e 8b 42 04 8b 12 25 ff ff ff 7f 09 c1 eb ee 89 8b 34 01 00 00 5b c3 55 89 d5 57 89 c7 56 53 8b 40 08 8
b 70 10 <0f> b7 46 20 25 00 f0 00 00 3d 00 40 00 00 75 4d 8d 46 68 e8 fb
Mar 23 15:57:00 alpha kernel: <0>Fatal exception: panic in 5 seconds
Mar 23 16:06:46 alpha syslogd 1.4.1: restart.
So it seems like httpd crashed my server? I checked the Apache error_log and noticed lines like these:
Code:
*** glibc detected *** free(): invalid pointer: 0x08872c98 ***
[Fri Mar 23 15:57:03 2007] [error] [client x.x.x.x] Premature end of script headers: /home/user/public_html/forum/index.php
[Fri Mar 23 15:57:03 2007] [error] [client x.x.x.x] File does not exist: /home/user/public_html/500.shtml
When I look at the whole error_log it seems like such errors appear frequently and for different websites and PHP applications. This isn't the only glibc error, there's also stuff like "*** glibc detected *** corrupted double-linked list: 0x088e0bb8 ***". I have recently installed eAccelerator and searched the web: I'm not the only one who has such problems with eAccelerator. Do you think these glibc errors may have caused the server to crash?
Also, lately I noticed a lot of lines like these in the /var/log/messages file:
Code:
Mar 23 15:47:45 alpha kernel: post_create: setxattr failed, rc=122 (dev=sda7 ino=4318565)
and
Code:
Mar 23 15:50:56 alpha ntpd[2958]: sendto(66.111.46.200): Operation not permitted
I've done some Google'ing on the first error and it seems like someone with the same error got it fixed by running a filesystem check... By the way /dev/sda7 is my /home directory. But in order to run a filesystem check I need to disable all services and unmount /home? That's kind of a pain in the ***... In general, how long do you think it takes to run a filesystem check? Here's information about my /home partition:
Code:
/dev/sda7 198G 71G 118G 38% /home
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Jun 26, 2013
I'm running a WAMP server, hosting an internal website for my company's use.
Windows XP Home SP3
Apache 2.0
MySQL Server 5.5
PHP 5.?
Last night Microsoft Security Essentials froze while running a scan. I restarted the scan and it froze again, so I rebooted the server. Now Apache won't start, providing the following error ....
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Oct 5, 2008
My server hard disk is crashed badly. The rescue function in the server cannot take part and so I've tried using some recovery software to get back my data.
I've tried using Easy Recovery Professional. It sort all the files by it file type into different folder. I found a folder named .DB, there are also some .ado and . ldb folder too. I guess one of it is my database. The problem now is, i dunno how to read the file.
Do you have any idea to read it? I've tried many recovery system. eg. DiskInternals Linux Recovery, Disk Doctor Linux Recovery.
it is a linux server
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Jun 22, 2015
It seems the servers dns will not resolve and has crashed. When starting the "Named" service, here is the error:
Error in named configuration:
zone 0.0.127.IN-ADDR.ARPA/IN: loaded serial 20010622
zone 215.170.107.in-addr.arpa/IN: loaded serial 1433121512
zone lanewgirl.com/IN: NS 'ns.mydomain.com' has no address records (A or AAAA)
zone mydomain.com/IN: not loaded due to errors.
_default/mydomain.com/IN: bad zone
zone mydomain2.com/IN: NS 'ns.mydomain2.com' has no address records (A or AAAA)
zone mydomain2.com/IN: not loaded due to errors.
_default/mydomain2.com/IN: bad zone
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Jul 27, 2009
I've been browsing Google and have learned a lot about how to read stats and what to look out for. However I'm not understanding what effects what.
We've increased
max_user_connections from the default 25 to 50 and
max_connections from 500 to 1,000
What area would this effect, RAM? CPU? If I'm having issues with CPU during my heavy load times, What should I look to optimize on our web site? We also disabled gzip on css/js files to prevent the server from over-working.
I've also run into the Today's stats for the server. Can someone tell me more about the part:
Quote:
Top Process%CPU 29.0/usr/local/bin/perl -w /usr/share/munin/munin-update
Top Process%CPU 28.0/usr/local/bin/perl -w /usr/share/munin/munin-update
Top Process%CPU 27.0/usr/local/bin/perl -w /usr/share/munin/munin-update
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Aug 26, 2007
How well would a website do if it was featured on d-igg with these specs? (assuming it was the only site on the server)
Xeon 2.8, Quad core 4mb cache
4gig RAM
2x73gb SCSI
2,500gb b/w
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Sep 12, 2007
I learned the hard way last year when my website (on GoDaddy shared hosting) made the front page of Digg. GoDaddy suspended my account in a hurry (and didn't bother to inform me, but that's another story). I'm planning to get a VPS account with SLHost to prepare for future traffic growth.
How should I configure the server to best handle a huge spike in traffic? From what I can gather, there are a number of factors:
- Max HTTP connections (MaxClients in Apache)
- Max number of open file handles allowed (a kernel thing)
- Virtuozzo allowed TCP connections
This post at webhostingtalk.com/showthread.php?p=4552677#post4552677
by Josh at SLHost outlines the defaults for their VPS servers:
Quote:
Are you referring to HTTP connections or other? By default, the MaxClients setting is at 256 clients and would need a recompile if you want more. The number of open files allowed is set to 1024 by default and can be raised. There are also Virtuozzo allowed TCP connections, which is set at 1200 and we've noticed that anything more than that should either be on an Enterprise VPS package or low end dedicated server at least.
Should I do any tweaking to the defaults if I want to survive another Digg onslaught?
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Jun 29, 2009
I have a vps and I was having memory issues so I reboot my server. Upon doing that it seems to have put itself into a loop and is constantly rebooting itself every 5mins.
I checked the logs at /var/log/messages and found this:
Code:
(?@127.0.0.1) [INFO] Logout.
Jun 29 11:55:49 evercuben xinetd[24525]: EXIT: ftp status=255
pid=24296 duration=0(sec)
Jun 29 11:55:49 evercuben xinetd[24525]: EXIT: smtp status=1 pid=24292
duration=0(sec)
Jun 29 12:00:49 evercuben xinetd[24525]: START: smtp pid=1628 from=127.0.0.1
Jun 29 12:00:49 evercuben xinetd[24525]: START: ftp pid=1630 from=127.0.0.1
Jun 29 12:00:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] New
connection from 127.0.0.1
Jun 29 12:00:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] Logout.
Jun 29 12:00:49 evercuben xinetd[24525]: EXIT: ftp status=255 pid=1630
duration=0(sec)
Jun 29 12:00:49 evercuben xinetd[24525]: EXIT: smtp status=1 pid=1628
duration=0(sec)
Jun 29 12:05:49 evercuben xinetd[24525]: START: smtp pid=11347 from=127.0.0.1
Jun 29 12:05:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] New
connection from 127.0.0.1
Jun 29 12:05:49 evercuben xinetd[24525]: START: ftp pid=11349 from=127.0.0.1
Jun 29 12:05:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] Logout.
Jun 29 12:05:49 evercuben xinetd[24525]: EXIT: ftp status=255
pid=11349 duration=0(sec)
Jun 29 12:05:51 evercuben xinetd[24525]: EXIT: smtp status=1 pid=11347
duration=2(sec)
Jun 29 12:10:49 evercuben xinetd[24525]: START: smtp pid=20210 from=127.0.0.1
Jun 29 12:10:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] New
connection from 127.0.0.1
Jun 29 12:10:49 evercuben xinetd[24525]: START: ftp pid=20212 from=127.0.0.1
Jun 29 12:10:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] Logout.
Jun 29 12:10:49 evercuben xinetd[24525]: EXIT: ftp status=255
pid=20212 duration=0(sec)
Jun 29 12:10:49 evercuben xinetd[24525]: EXIT: smtp status=1 pid=20210
duration=0(sec)
Jun 29 12:15:49 evercuben xinetd[24525]: START: smtp pid=30100 from=127.0.0.1
Jun 29 12:15:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] New
connection from 127.0.0.1
Jun 29 12:15:49 evercuben xinetd[24525]: START: ftp pid=30102 from=127.0.0.1
Jun 29 12:15:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] Logout.
Jun 29 12:15:49 evercuben xinetd[24525]: EXIT: ftp status=255
pid=30102 duration=0(sec)
Jun 29 12:15:49 evercuben xinetd[24525]: EXIT: smtp status=1 pid=30100
duration=0(sec)
Jun 29 12:20:49 evercuben xinetd[24525]: START: smtp pid=7525 from=127.0.0.1
Jun 29 12:20:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] New
connection from 127.0.0.1
Jun 29 12:20:49 evercuben xinetd[24525]: START: ftp pid=7527 from=127.0.0.1
Jun 29 12:20:49 evercuben pure-ftpd: (?@127.0.0.1) [INFO] Logout.
Jun 29 12:20:49 evercuben xinetd[24525]: EXIT: ftp status=255 pid=7527
duration=0(sec)
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May 30, 2007
i'm kinda desperate right now, I have an Ultra Sparc II with Solaris 8 but suddenly it start rebooting again and again by himself, after initialize memmory and starts booting, once the server displays the hostname it says that the server is coming down. and reboot all over again.
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May 30, 2007
I have an Ultra Sparc II with Solaris 8 but suddenly it start rebooting again and again by himself, after initialize memmory and starts booting, once the server displays the hostname it says that the server is coming down. and reboot all over again.
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Jul 14, 2007
I have a server that is monitored with a system that automatically reboots if a service appears to be down. The server is being rebooted several times a month and it seems to be getting more frequent.
The server load is almost never high. It's a dual Xeon with hyperthreading and the load is almost always below 1. Practically the only time it goes high is during cPanel backup and it hardly ever reboots during that.
The DC tried replacing the RAM, but a day and a half later it rebooted again.
The server has 1 fairly active MySQL message board and 3 fairly high bandwidth sites (images and video clips), and the rest of the sites are quite small and inactive. One thing the tech said was "Apache gets a lot of traffic so I'm not surprised to see an apache restart once a month or so. You have 115 concurrent connections to apache and over 25,000 hits in the last 2 hours alone" but I've gotten reboots a few times/week.
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Feb 19, 2008
I have compiled a RT kernel using 2.6.24 and it has been working great. All of our machines are runnin Centos 5. No issues like the previous configurations on Dual Quad Xeons 5335's and 8GB of RAM. As well as one box with Dual Core Xeon 5140's with 4GB of RAM. They have identical motherboards. My issue is that when you do a soft reboot, it doesn't "technically" reboot. It does, but it doesn't. Let me explain. It kills my ssh connection and you can't ping it for maybe say a minute or 2. When it comes back up, you get a new SSH key to login. You hit ok, and you try logging in. It doesn't accept any passwords. The server basically becomes inoperable.
The only way to solve this is to do a hard reboot. Phsyically rebooting the server.
What could be causing this? This only started to happened when using the RT kernel. Is there an option that may be conflicting with it, however our 3rd and 4th box, with the same configuration has no issues like this. Soft reboots work great.
Here is the message log.
Feb 19 04:00:02 server530 shutdown[25342]: shutting down for system reboot
Feb 19 04:00:02 server530 init: Switching to runlevel: 6
Feb 19 04:00:03 server530 smartd[3037]: smartd received signal 15: Terminated
Feb 19 04:00:03 server530 smartd[3037]: smartd is exiting (exit status 0)
Feb 19 04:00:09 server530 ntpd[20917]: ntpd exiting on signal 15
Feb 19 04:00:09 server530 rpc.statd[2570]: Caught signal 15, un-registering and exiting.
Feb 19 04:00:09 server530 portmap[25711]: connect from 127.0.0.1 to unset(status): request from unprivileged port
Feb 19 04:00:10 server530 auditd[2469]: The audit daemon is exiting.
Feb 19 04:00:10 server530 kernel: audit(1203415210.158:8204): audit_pid=0 old=2469 by auid=4294967295
Feb 19 04:00:10 server530 pcscd: pcscdaemon.c:529ignal_trap() Preparing for suicide
Feb 19 04:00:10 server530 pcscd: hotplug_libusb.c:361:HPEstablishUSBNotifications() Hotplug stopped
Feb 19 04:00:11 server530 pcscd: readerfactory.c:1350:RFCleanupReaders() entering cleaning function
Feb 19 04:00:11 server530 pcscd: pcscdaemon.c:489:at_exit() cleaning /var/run
Feb 19 04:00:11 server530 kernel: Kernel logging (proc) stopped.
Feb 19 04:00:11 server530 kernel: Kernel log daemon terminating.
Feb 19 04:00:12 server530 exiting on signal 15
Oh and this is to reboot the server nightly at 4am, when this issue occurs.
0 4 * * * /usr/bin/reboot > /dev/null 2>&1
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May 27, 2008
my server has two NICs with eth0 and eth1,
i use the eth0 for the default connection,
i want to ask after rebooting,
how can i let the eth0 work automatically,but eth1 will not work auto,
if need,i can ifup eth1 manually.
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Jul 15, 2009
I have been trying to change an IP address on a customers Linux(RH9) server and I am getting errors, Can some on point/push me in the correct direction.
I am editing /etc/sysconfig/network-scripts/ifcfg-eth0 and am getting this message,
"1. Quit editing this file, because another edit session is active on this file.Continuing to edit will result in two versions of the same file. The one that is written last will overwrite the other one, resulting in loss of changes. The text "ifcfg-eth0" indicates that the process
editing this file runs on the same computer. When working over a network you will not see this message, because the process will be running on another computer.
2. Recover a previously crashed edit session."
This is a stand alone server and noone else uses this server.
I have tried to use the vim rercover command but no luck.
I am more use to using pico than vi, but pico is not installed.
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Jun 4, 2014
Are there any special practices to reboot a node in PPA?
So far a simple "shutdown -r now" hasn't broken anything but I want to make sure PPA doesn't make assumptions about the nodes being up at any point. (both management and service)...
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May 10, 2007
This morning, apache crashed on the server that I assist a friend of mine (junglecat here) with. We finally managed to get it up and going - for some odd reason, restarting apache/httpd via Cpanel wouldn't get it going, but SSHing and typing via command line would.
I downloaded the apache error log, and it's CHOCK full of this, repeating over and over (and over) again:
DBD::mysql:t bind_columns failed: Statement has no result columns to bind (perhaps you need to successfully call execute first) at email.pl line 55.
DBD::mysql:t fetch failed: fetch() without execute() at email.pl line 56.
Use of uninitialized value in concatenation (.) or string at email.pl line 59.
Use of uninitialized value in concatenation (.) or string at email.pl line 61.
Use of uninitialized value in concatenation (.) or string at email.pl line 76.
Have tried searching and either I'm not using the correct terms, or this doesn't happen that much (I am betting on the former). Any ideas?
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Apr 5, 2009
I have a table that is showing
MySQL Error: 145 (Table './dollarpt_ptc/flinks' is marked as crashed and should be repaired)
I've repaired it via
mysqlcheck --repair --all-databases
that didn't work. I've tried
find /var/lib/mysql/* -name *MYI |xargs myisamchk -o -r
as well with no luck.
I then dropped the table and I still get the message. I know it's using the correct database, so any help would be appreciated.
It's like there is a table where this data is kept, but I've looked and can't find anything.
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Sep 28, 2007
Table '231_message' is marked as crashed and should be repaired
I haven't ever had this happen, is all my data truely lost or can i 'repair' it
i was moving sites to a different server (VPS -> dedicated) and on the vps i have a max of 20gb storage, well as i was using the cpanel transfer it filled this up because it didnt have a warning about this (i dont accept blame )
either way it seemed at this time someone on my site tried to make an adjustment to the table and it crashed it since there wasnt room? i really need to get this fixed asap so I can properly move this site with a working database
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