Discuss April 2010

discuss@lists.centos.org

265 participants
237 discussions

How long will CENTOS 4.X automatic resync to to time server???
by mcclnx mcc 12 Apr '10

12 Apr '10

We have several CENTOS 4 and 5 servers. ALL CENTOS servers have NTP setup to sync time server. Several days ago due to power outage all servers are reboot. Due to DNS server did NOT up quickly, CENTOS servers start up and can NOT find time server. For CENTOS 5.X servers, it did quickly resync to time server after 30 minutes. For CENTOS 4.X servers, it have been 3 days still NOT sync to time server. I know I can run "service ntpd restart" to force server sync to time server, but I like to know how long it take for CENTOS 4.X automatic resync to time server. Thanks.

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OT: Dropbox - Fedora Core 9 RPM will work on CentOS 5.4?
by Lanny Marcus 12 Apr '10

12 Apr '10

Dropbox has an RPM for Fedora Core 9 (x86). I am running CentOS 5.4 on my Desktop, which I believe is based on Fedora Core 6. Are the libraries Fedora Core 9 uses substantially different than those CentOS 5.4 uses? If Dropbox had an SRPM available, I would Download that and Rebuild, but I'm sure it is Proprietary and they won't release an SRPM to me. TIA! Lanny -------------------------------------- Magazine subscriptions Largest discount Credit/Debit Card Check Pay Pal http://www.lowcostmagazines.com/

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'p' in boot selector & going into single-user
by ken 12 Apr '10

12 Apr '10

On boot, when I hit the F12 key to bring up the boot menu, the screen displays the various kernels and other boot options. In the text below this menu it says I can hit 'p' to bring up a menu with other options. I've done this with the last two boot-ups and no other menu or options appear. Is something missing? (I also tried Alt-p, Shift-p, Ctrl-p and a few other keys and there's no change onscreen.) I'd like to know also how to select single user mode, but haven't found a way to do that. Thanks much.

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mysterious weekly shutdown
by Frank Cox 12 Apr '10

12 Apr '10

I have a Centos 5.4 machine that has, for the past two weeks, apparently been shut off over the weekend. It's just sitting there turned off on Monday morning and when someone hits the power switch it comes right back on and everything works again. This happened last weekend, and again over this past weekend. Here is /var/log/messages from shortly before it apparently shut down this weekend. Can anyone tell me what is or might be going on? Apr 10 11:01:27 answeringmachine vgetty[6012]: message keep, length=00:00:20, name='', caller=none, dev=ttyACM0, pid=6012 Apr 10 11:19:10 answeringmachine vgetty[6095]: message keep, length=00:00:24, name='', caller=none, dev=ttyACM0, pid=6095 Apr 10 11:43:56 answeringmachine vgetty[6134]: message keep, length=00:00:11, name='', caller=none, dev=ttyACM0, pid=6134 Apr 10 12:22:34 answeringmachine mgetty[6029]: fax dev=ttyS1, pid=6029, caller='none', name='', id='', +FHNG=074, pages=0/0, time=00:00:51 Apr 10 12:43:49 answeringmachine gconfd (freeads-3524): Exiting Apr 10 12:43:49 answeringmachine gdm[2872]: Master halting... Apr 10 12:43:49 answeringmachine pcscd: winscard.c:304:SCardConnect() Reader E-Gate 0 0 Not Found Apr 10 12:43:50 answeringmachine shutdown[2872]: shutting down for system halt Apr 10 12:43:50 answeringmachine mgetty[6262]: failed dev=ttyS1, pid=6262, got signal 15, exiting Apr 10 12:43:50 answeringmachine mgetty[2874]: failed dev=ttyS2, pid=2874, got signal 15, exiting Apr 10 12:43:50 answeringmachine vgetty[2877]: failed dev=ttyACM1, pid=2877, got signal 15, exiting Apr 10 12:43:50 answeringmachine vgetty[6183]: failed dev=ttyACM0, pid=6183, got signal 15, exiting Apr 10 12:43:51 answeringmachine smartd[2854]: smartd received signal 15: Terminated Apr 10 12:43:51 answeringmachine smartd[2854]: smartd is exiting (exit status 0) Apr 10 12:43:52 answeringmachine avahi-daemon[2769]: Got SIGTERM, quitting. Apr 10 12:43:52 answeringmachine avahi-daemon[2769]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::21c:c0ff:fee3:f1b1. Apr 10 12:43:52 answeringmachine avahi-daemon[2769]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.0.6. Apr 10 12:43:52 answeringmachine mountd[2588]: Caught signal 15, un-registering and exiting. Apr 10 12:43:52 answeringmachine kernel: nfsd: last server has exited Apr 10 12:43:52 answeringmachine kernel: nfsd: unexporting all filesystems Apr 10 12:43:57 answeringmachine ntpd[2532]: ntpd exiting on signal 15 Apr 10 12:43:57 answeringmachine nm-system-settings: disconnected from the system bus, exiting. Apr 10 12:43:57 answeringmachine kernel: nm-system-setti[3083]: segfault at 0000000000000000 rip 0000000000000000 rsp 00007fffb3916778 error 14 Apr 10 12:43:57 answeringmachine rpc.statd[2349]: Caught signal 15, un-registering and exiting. Apr 10 12:43:57 answeringmachine auditd[2264]: The audit daemon is exiting. Apr 10 12:43:57 answeringmachine kernel: audit(1270925037.732:154): audit_pid=0 old=2264 by auid=4294967295 Apr 10 12:43:57 answeringmachine pcscd: pcscdaemon.c:572:signal_trap() Preparing for suicide Apr 10 12:43:58 answeringmachine pcscd: hotplug_libusb.c:376:HPRescanUsbBus() Hotplug stopped Apr 10 12:43:58 answeringmachine pcscd: readerfactory.c:1379:RFCleanupReaders() entering cleaning function Apr 10 12:43:58 answeringmachine pcscd: pcscdaemon.c:532:at_exit() cleaning /var/run Apr 10 12:43:59 answeringmachine kernel: Kernel logging (proc) stopped. Apr 10 12:43:59 answeringmachine kernel: Kernel log daemon terminating. Apr 10 12:44:00 answeringmachine exiting on signal 15 -- MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

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how long NTP sync to time server on CENTOS 4.X????
by mcclnx mcc 12 Apr '10

12 Apr '10

2 1

Re: [CentOS] everything seems to hang, but system is idle? [SOLVED]
by Rudi Ahlers 12 Apr '10

12 Apr '10

On Mon, Apr 12, 2010 at 1:50 PM, JohnS <jses27(a)gmail.com> wrote: > > On Sun, 2010-04-11 at 15:48 +0200, Rudi Ahlers wrote: > >> Yes, I think it could be a problematic iscsi config. Now that I think >> of it, the server wasn't rebooted in about 2 or 3 months and I did >> some iscsi testing a while ago, but with a recent power outage it >> could have enabled / a faulty configuration, I just rebooted the >> server again, managed to the remove iscsi this time, and will see if >> this solves the problem. > --- > > Well along with that I would do a file system check. Then if it keeps > on stop just the nmbd service and not smbd for cifs sharing. > > John > > _______________________________________________ So far everything seems to be fine, apart from my Cobbler problem (see other thread). rsync has been running very well for the past few hours (have been deleting & restoring a lot of stuff to check ) so it was probably the improper iscsi mount that was giving issues. Thanx for all the help :) -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Performance problems with XFS on Centos 5.4
by Bernhard Gschaider 12 Apr '10

12 Apr '10

Hi! During the last weeks I experienced some performance problems with a large file-system on XFS basis. Sometimes for instance ls is painfully. Immidiatly afterwards ls on the same directory is immidiate. I used strace on this ls and found that during the first ls the lstat-calls need approx 0.02s each while during the second ls the are two orders of magnitude faster. Googling around I stumbled upon some messages similar like this http://www.opensubscriber.com/message/linux-xfs@oss.sgi.com/1355060.html which have in common a) they're from around 2006 b) they suggest to increase a mount-option ihashsize. This mount option is listed as deprecated in the current kernel-doc So my question: does anyone have experience with that kind of performance problem? Do you think it is a XFS problem or are there some other tuning parameters in the kernel that could be modified for instance via /proc? The reason why I'm asking here is that it is a production file-system so I would be very unpopular if I experiment too much (a couple of reboots is OK ;) ) Bernhard PS: the situation got worse during the last weeks when the file-system increased in size, so the option that some kind of buffer now is too small and I'm experiencing some kind of thrashing seems very likely to me

2 2

Yum/WGET/HTTP sourceforge etc.
by tony.chamberlain＠lemko.com 12 Apr '10

12 Apr '10

I am having a problem with 5.4 that I did not have with 4.5. The problem happens only sometimes but in specific instances. Basically a summary of the problem is that certain network transactions timeout. The specfic instances are with wget, rpm, http. The problem usually, but not always, occurs with pptp stuff. (NOT running pptp but getting pptp stuff). For instance, the following command, which finishes in seconds on non-5.4 OS's: wget http://pptpclient.sourceforge.net/yum/stable/rhel4/pptp-release-current.noa… downloads about 20% then gets stuck. About 5 minutes later it downloads another 20% and then gets stuck, etc. The same thing with rpm: rpm -ivh http://pptpclient.sourceforge.net/yum/stable/rhel4/pptp-release-current.noa… waits about 3 minutes and then gives an error. I think it does the same thing as the wget but wget will keep trying, while rpm gives up. The error from rpm: Retrieving http://pptpclient.sourceforge.net/yum/stable/rhel4/pptp-release-current.noa… ..five minutes later: error: /var/tmp/rpm-xfer.DYY9e0: headerRead failed: hdr blob(7456): BAD, read returned 3568 error: /var/tmp/rpm-xfer.DYY9e0 cannot be installed I can wget the above as I mentioned before and install it that way. Before I do it, yum works fine. Afterwards, yum exhibits the same behavior of timing out (because it is using the pptp repository). Also visiting the pptp web site from Firefox times out on certain pages. I originally thought it was some problem with the pptp site, but I notice that log into hotmail.com does the same thin (fine on other operating systems). A view with Wireshark on the wget (pptp) shows the my machine receiving a reassembled TCPPDU from 216.34.181.96 (Sourceforge), sending an ack, receiving a reassembled PDU, sending an ack, receiving, sending followed by the 5 minutes or whatever of nothing. Then sourceforge sends an RST and a SYN and the process is repeated. Here is what I tried. When I put the machine directly on an AT&T IP connection (12.147.X.Y) everything worked fine. Same with Comcast on a direct link. The times I am having problems is when our router is hooked up to a Comcast IP (70.88.X.Y) and assigns 192.168.5.X addresses to our machines. So when I was doing the above from 192.168.5.27 going through the router through Comcast is when I had the problem. So it is probably something with the router, but it is hard to figure out since CentOS 4.5 and Fedora do not exhibit this behavior, nor does 5.4 on most sites (mail.yahoo.com for instance). I did verify, at least from what I could, that ICMP type 3 and 4 are not being blocked. If they were, the same problem would happen on other op systems. And I was able to ping, albeit just locally, but we looked at the router settings and ping was not blocked. Anyone else have this problem / know what might be wrong?

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everything seems to hang, but system is idle?
by Rudi Ahlers 12 Apr '10

12 Apr '10

Hi All, My one server recently started acting very weird. At fist I couldn't import any images with cobbler as rsync crashes the whole time. I was told to ask on the cobbler list (maybe it's not supported here?) but I left it at that (subscribed to far too many lists already). Yesteday I wanted to copy some stuff from a USB disk to the server (using rsync to update the files which have changed, or new files) but it seems like rsync hangs without any errors. Now, when I tried to update CentOS I get the same "error" in that yum hangs. At the same time I can open a new SSH session and do whatevery I like. But it seems that running a command which takes time to complete hangs. For example: ==================================================================================================================================================== Package Arch Version Repository Size ===================================================================================================================================================== Removing: iscsi-initiator-utils x86_64 6.2.0.871-0.12.el5_4.1 installed 1.9 M Removing for dependencies: gnome-applet-vm x86_64 0.1.2-1.el5 installed 121 k libvirt x86_64 0.6.3-20.1.el5_4 installed 7.1 M libvirt-python x86_64 0.6.3-20.1.el5_4 installed 431 k python-virtinst noarch 0.400.3-5.el5 installed 1.4 M virt-manager x86_64 0.6.1-8.el5 installed 4.9 M virt-viewer x86_64 0.0.2-3.el5 installed 48 k xen x86_64 3.0.3-94.el5_4.3 installed 4.7 M Transaction Summary ===================================================================================================================================================== Remove 8 Package(s) Reinstall 0 Package(s) Downgrade 0 Package(s) Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test [root@intranet Torrents]# mount /dev/sdc1 /mnt/ Even running "top" does the same, yet I can't kill "top" with CTRL+C, or even "killall -9 top" from a new SSH session. [root@intranet ~]# ps ax | grep top 20825 pts/6 R+ 0:00 grep top [root@intranet ~]# ps ax | grep rsync 6536 ? D 3:10 rsync -avz --progress /mnt/usb-backup/backups/current/home/www/linux/centos /home/www/linux/ 6537 ? Z 0:00 [rsync] <defunct> 8630 ? S 0:00 rsync -avz --progress --stats /mnt/usb-backup/backups/current/home/www/linux/ /home/www/linux/ 8631 ? Z 0:00 [rsync] <defunct> 20827 pts/6 R+ 0:00 grep rsync [root@intranet ~]# ps ax | grep yum 20390 pts/4 S+ 0:02 /usr/bin/python /usr/bin/yum remove iscsi-initiator-utils 20829 pts/6 R+ 0:00 grep yum [root@intranet ~]# /var/log/messages doesn't show me any errors. Any suggestions on this? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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NAT/DHCP/DNS/etc Settings from a Windows 2003 Server
by David Lemcoe 12 Apr '10

12 Apr '10

Hello all. I'm in the process of making a small server farm based mostly on Windows Server 2003. For simplicity's sake, the only non-2003 server will be a CentOS 5.4 server running only vsftpd, httpd, and mysqld. My plan is to have this server in a 2003 Server's network receiving a DHCP address from the Domain Controller. Currently, I have two other (non-DC) servers running with no issues on the domain. NAT works as it should, and internet access is just fine. The CentOS box on the same network will not receive an IP address (only through static configuration, the non-DC 2003 boxes have no problem receiving an IP and DNS settings with auto settings) or get online. Even when defining a static IP on the CentOS box, there is no Internet access, unlike to the other clients. My question is, what could be restricting the DHCP and DNS information to the CentOS host, and why can't I access the internet/NAT forward a web server? To summarize, I have four machines involved, all located on the same network: - Machine 1 - Windows Server 2003 Enterprise - Domain Controller, DHCP server, DNS server, NAT server. - Machine 2 - Windows Server 2003 Enterprise - Domain member, Exchange server. - Receives DHCP and DNS information with automatic network settings. - Has internet access through NAT. - NAT forwards ports to this host. - Machine 3 - Windows Server 2003 Enterprise - Domain member, Sharepoint Server. - Receives DHCP and DNS information with automatic network settings. - Has internet access through NAT. - NAT forwards ports to this host. - *Machine 4* - CentOS 5.4 - On same network as other clients, hosts web server. - Does *NOT *receive DHCP address or DNS information. - Has *no *internet access - NAT does *NOT *forward correctly. I am looking for a solution to get the CentOS server on the network like the other clients. Any assistance on this problem would be greatly appreciated. David

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Discuss April 2010