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• SQL 2008 SP1 crashing almost daily

  - by matijake

  Hey, almost every day our new DB crashes. It is virtual server residing on same hardware as 5 other servers, two of them beeing identical MS SQL2008sp1 and two Oracle 11g's so I can pretty much rule out hardware issues. Server has dedicated local LUN, 4vCPU and 8GB memory with 2GB windows swap file. It runs 4 instances. Primary instance is limited to 5GB memory and paralelism set to 4 running on MS SQL 2008 SP1 @ Windows Server 2008 Enterprise R2 x64. Only that primary instance is crashing. After it crashes nothing can connect to it, it's even impossible to shut it down through service manager. What I found in logs is: ***Stack Dump being sent to C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\LOG\SQLDump0081.txt SqlDumpExceptionHandler: Process 4788 generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION. SQL Server i s terminating this process.     Whole log can be seen at: http://kabl.org/files/SQLDump0081.txt second crash log made second later at: http://kabl.org/files/SQLDump0082.txt I have analyzed mini crashdump with Microsoft tools, but no promising results. If it can help, here it is: http://kabl.org/files/SQLDump0081.mdmp Any ideas are greatly welcome, since it is becoming quite a pain in the ass to restart server almost every day :) Regrads, -Matija

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• Either, nginx+php-fpm bad config or nginx+php-fpm cannot handle high query?

  - by The Wolf

  I have wordpress installed in my server configured(hopefully with nginx+php-fpm+mariaDB). I am trying to import using wordpress importer a 1.5MB xml file. Everytime I try to upload it using the importer, it got cut of... meaning just blank screen result.. Here is my error log: actually I just posted 2 of the errors [error] 858#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: xx.xxx.xx.xx, server: xxx.com, request: "GET xxxx.html HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "xxx.com" [error] 858#0: *13 connect() failed (111: Connection refused) while connecting to upstream, client: xxx.x.xx.xx, server: xxx.com, request: "GET xxxx.php HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "xxx.com" I don't know what is the reason why it can't process the wordpress export .xml. I already increased max_file_upload & etc., but nothing happens. Hope somebody can help me. Here are my conf: nginx.conf user nginx; worker_processes 8; error_log /var/log/nginx/error.log warn; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include /etc/nginx/mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on; #tcp_nopush on; server_tokens off; keepalive_timeout 65; fastcgi_read_timeout 500; #gzip on; client_max_body_size 2M; php-fpm.conf ;;;;;;;;;;;;;;;;;;;;; ; FPM Configuration ; ;;;;;;;;;;;;;;;;;;;;; ; All relative paths in this configuration file are relative to PHP's install ; prefix. ; Include one or more files. If glob(3) exists, it is used to include a bunch of ; files from a glob(3) pattern. This directive can be used everywhere in the ; file. include=/etc/php-fpm.d/*.conf ;;;;;;;;;;;;;;;;;; ; Global Options ; ;;;;;;;;;;;;;;;;;; [global] ; Pid file ; Default Value: none pid = /var/run/php-fpm/php-fpm.pid ; Error log file ; Default Value: /var/log/php-fpm.log error_log = /var/log/php-fpm/error.log ; Log level ; Possible Values: alert, error, warning, notice, debug ; Default Value: notice ;log_level = notice ; If this number of child processes exit with SIGSEGV or SIGBUS within the time ; interval set by emergency_restart_interval then FPM will restart. A value ; of '0' means 'Off'. ; Default Value: 0 ;emergency_restart_threshold = 0 ; Interval of time used by emergency_restart_interval to determine when ; a graceful restart will be initiated. This can be useful to work around ; accidental corruptions in an accelerator's shared memory. ; Available Units: s(econds), m(inutes), h(ours), or d(ays) ; Default Unit: seconds ; Default Value: 0 ;emergency_restart_interval = 0 ; Time limit for child processes to wait for a reaction on signals from master. ; Available units: s(econds), m(inutes), h(ours), or d(ays) ; Default Unit: seconds ; Default Value: 0 ;process_control_timeout = 0 ; Send FPM to background. Set to 'no' to keep FPM in foreground for debugging. ; Default Value: yes daemonize = no ;;;;;;;;;;;;;;;;;;;; ; Pool Definitions ; ;;;;;;;;;;;;;;;;;;;; ; See /etc/php-fpm.d/*.conf [root@host etc]# vim php-fpm.conf [root@host etc]# vim php-fpm.conf ; Default Value: notice ;log_level = notice ; If this number of child processes exit with SIGSEGV or SIGBUS within the time ; interval set by emergency_restart_interval then FPM will restart. A value ; of '0' means 'Off'. ; Default Value: 0 ;emergency_restart_threshold = 0 ; Interval of time used by emergency_restart_interval to determine when ; a graceful restart will be initiated. This can be useful to work around ; accidental corruptions in an accelerator's shared memory. ; Available Units: s(econds), m(inutes), h(ours), or d(ays) ; Default Unit: seconds ; Default Value: 0 ;emergency_restart_interval = 0 ; Time limit for child processes to wait for a reaction on signals from master. ; Available units: s(econds), m(inutes), h(ours), or d(ays) ; Default Unit: seconds ; Default Value: 0 ;process_control_timeout = 0 ; Send FPM to background. Set to 'no' to keep FPM in foreground for debugging. ; Default Value: yes daemonize = no ;;;;;;;;;;;;;;;;;;;; ; Pool Definitions ; ;;;;;;;;;;;;;;;;;;;; ; See /etc/php-fpm.d/*.conf ps aux [root@host etc]# ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.1 2900 1380 ? Ss Jun02 0:00 init root 2 0.0 0.0 0 0 ? S Jun02 0:00 [kthreadd/9308] root 3 0.0 0.0 0 0 ? S Jun02 0:00 [khelper/9308] root 124 0.0 0.0 2464 576 ? S<s Jun02 0:00 /sbin/udevd -d root 460 0.0 0.1 35976 1308 ? Sl Jun02 0:00 /sbin/rsyslogd -i /var/run/syslogd.pid -c 5 root 474 0.0 0.0 8940 1028 ? Ss Jun02 0:00 /usr/sbin/sshd root 481 0.0 0.0 3264 876 ? Ss Jun02 0:00 xinetd -stayalive -pidfile /var/run/xinetd.pid root 491 0.0 0.1 6268 1432 ? S Jun02 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/host.busilak.com. mysql 584 0.1 6.8 679072 71456 ? Sl Jun02 0:04 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --use root 586 0.0 0.3 12008 3820 ? Ss Jun02 0:01 sshd: root@pts/0 root 629 0.0 0.0 9140 756 ? Ss Jun02 0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -n 2 root 630 0.0 0.0 9140 520 ? S Jun02 0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -n 2 root 645 0.0 0.1 12788 1928 ? Ss Jun02 0:01 sendmail: accepting connections smmsp 653 0.0 0.1 12576 1728 ? Ss Jun02 0:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue root 691 0.0 0.1 7148 1184 ? Ss Jun02 0:00 crond root 698 0.0 0.1 6272 1688 pts/0 Ss Jun02 0:00 -bash root 1006 0.0 0.0 7828 924 ? Ss 00:30 0:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf nginx 1007 0.0 0.1 8156 1724 ? S 00:30 0:00 nginx: worker process nginx 1008 0.0 0.1 8024 1360 ? S 00:30 0:00 nginx: worker process nginx 1009 0.0 0.1 8020 1356 ? S 00:30 0:00 nginx: worker process nginx 1011 0.0 0.1 8024 1360 ? S 00:30 0:00 nginx: worker process nginx 1012 0.0 0.1 8024 1360 ? S 00:30 0:00 nginx: worker process nginx 1013 0.0 0.1 8024 1360 ? S 00:30 0:00 nginx: worker process nginx 1014 0.0 0.1 8024 1360 ? S 00:30 0:00 nginx: worker process nginx 1015 0.0 0.1 8024 1344 ? S 00:30 0:00 nginx: worker process root 1030 0.0 0.2 25396 2904 ? Ss 00:30 0:00 php-fpm: master process (/etc/php-fpm.conf) apache 1031 0.0 1.9 40700 20624 ? S 00:30 0:00 php-fpm: pool www apache 1032 0.0 2.0 41924 21888 ? S 00:30 0:01 php-fpm: pool www apache 1033 0.0 1.9 41212 20848 ? S 00:30 0:01 php-fpm: pool www apache 1034 0.0 1.9 40956 20792 ? S 00:30 0:01 php-fpm: pool www apache 1035 0.0 2.0 41560 21556 ? S 00:30 0:02 php-fpm: pool www apache 1040 0.0 1.8 39292 19120 ? S 00:30 0:00 php-fpm: pool www root 1125 0.0 0.0 6080 1040 pts/0 R+ 01:04 0:00 ps aux netstat -l [root@host etc]# netstat -l Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 *:ssh *:* LISTEN tcp 0 0 localhost.localdomain:smtp *:* LISTEN tcp 0 0 localhost.locald:cslistener *:* LISTEN tcp 0 0 *:mysql *:* LISTEN tcp 0 0 *:http *:* LISTEN tcp 0 0 *:ssh *:* LISTEN Active UNIX domain sockets (only servers) Proto RefCnt Flags Type State I-Node Path unix 2 [ ACC ] STREAM LISTENING 60575947 /var/run/saslauthd/mux unix 2 [ ACC ] STREAM LISTENING 60574168 @/com/ubuntu/upstart unix 2 [ ACC ] STREAM LISTENING 60575873 /var/lib/mysql/mysql.sock Hope somebody can help me to figure out what is the problem.

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• SSL Returning Blank Page, No Catalina Errors

  - by Mr.Peabody

  This is my second, maybe third, time configuring SSL with Tomcat. Earlier I had created a self signed, which worked, and now using my signed is proving fruitless. I am using Tomcat, operating from the Amazon Linux API. When using the signed cert/keystore, my server is starting normally without errors. However, when trying to navigate to the domain it is giving me an "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" error. My server.xml file looks as follows: <Connector port="8443" maxHttpHeaderSize="8192" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" disableUploadTimeout="true" acceptCount="100" scheme="https" secure="true" SSLEnabled="true" clientAuth="false" sslProtocol="TLS" keystoreFile="/home/ec2-user/.keystore/starchild.jks" keystorePass="d6b5385812252f180b961aa3630df504" /> It couldn't hurt to also mention that I'm using a wildcard certificate. Please let me know if anything looks amiss! EDIT: After looking more into this, I've determined there may be nothing is wrong with the Server.xml, or the listening ports. This is becoming more of an actual certificate error, as the curl request is giving me this error: curl: (35) Unknown SSL protocol error in connection to jira.mywebsite.com:-9824 Though, I can't seem to figure out what the "-9824" is. When comparing this curl to another similar setup (using the same Wildcard Certificate) it's turning up the full handshake, which is to be expected. I believe this is now between the protocol/cypher set default on JIRA servers.

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• Active Directory Child Domain Replication Problems

  - by MikeR

  Hi, I've recently inherited an Active Directory (all DCs Windows 2003) which has been configured with several child domains that are used as test environments for out CRM software. Two of these child domains have been used for testing using dates in the future (2015), throwing them well outside of the Kerberos tolerance for time, and they're flooding my event logs with replication errors such as the following: Description: The attempt to establish a replication link for the following writable directory partition failed. Directory partition: CN=Schema,CN=Configuration,DC=ad,DC=xxxxxxx,DC=com Source domain controller: CN=NTDS Settings,CN=TESTDC001,CN=Servers,CN=SiteName,CN=Sites,CN=Configuration,DC=ad,DC=xxxxxxx,DC=com Source domain controller address: 38e95b2a-35af-4174-84ba-9ab039528cce._msdcs.ad.xxxxxxx.com Intersite transport (if any): This domain controller will be unable to replicate with the source domain controller until this problem is corrected. User Action Verify if the source domain controller is accessible or network connectivity is available. Additional Data Error value: 5 Access is denied. I'd also like to upgrade to Windows 2008 at some point, but wouldn't want to attempt any schema updates while I'm not 100% confident on the replication. I'm guessing my only real solution will be to get rid of these child domains. The child domains are operating as stand alone domains, the DC is up and running and authenticating test users fine. I'm guessing the best solution to this would be to delete the domains (although I'd be happily told otherwise). The clock forwarding appears to have been happening for several years, so I'm assuming I can't just put the clock right (I'm guessing scope for this would be 180days, the same as the tombstone lifetime) With the replication errors would I be able to dcpromo the child domains DC, select it as the last domain controller in the domain and the child domain would be deleted? Or would I be better off treating the domain as an orphaned domain and use Microsoft's instructions to clear up as such. Any advice would be much appreciated.

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• Allowing XP Home Clients To Access Active Directory Printers

  - by Sean M

  My school's network is based on Active Directory on Windows Server 2003 servers. Most of the computers in the school are members of the domain. However, we also acquired a passel of netbooks that are running Windows XP Home (as netbooks tend to), and we're trying to make those useful. The netbooks are made available to students by check-out, so none of them are dedicated to a specific user. I only want to allow the netbooks to do two significant network activities: to access the Internet (this is working acceptably well so far), and to print to one or more printers on the network. That second one is where trouble starts. I'm trying to find a way to allow the XP Home clients to access those Active Directory printers. All the solutions that I can come up with right now are expensive, ugly, or both - for example, changing the OS on the netbooks (even with imaging, that would take a lot of my time) or making sure that the user account on each netbook has a matching account in Active Directory with permissions for printing (invites security/maintainability disaster). Are there any elegant solutions? Failing that, what's the best ugly solution for allowing my students to print from the netbooks?

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• Local DNS and Apache Server Configuration Interferring - example.com / www.example.com

  - by nicorellius

  I have a domain for my site: example.com I am also running local DNS with these lines: www IN CNAME server.<host_provider>.com. dev IN CNAME server.<host_provider>.com. So www.example.com and dev.example.com go to production and development sites, respectively, that are hosted by a host company. In my Apache configuration for the main site, I'm running a rewrite rule like this: RewriteEngine ON RewriteCond %{HTTP_HOST} ^example\.com$|!dev\.example\.com$ [NC] RewriteRule ^(.*)$ http://www\.%{HTTP_HOST}/$1 [R=302,L,NE] This rule seems to work, as when you are off the network and go to example.com in the browser, you get redirected to www.example.com. The problem is when I'm on the network, and I go to example.com I get an error page, saying page can't be found. No server errors; just a page can't be found, as if the local DNS is causing it to stop looking at that point. I'm also using Nettica for DNS service and have this A record in place: example.com Host (A) Default xxx.xx.xxx.xx This handles the external DNS, but my problem seems to be related to my internal DNS. For example, inside my network, I can go to servers on the network with addresses like this: server.example.com server1.example.com server2.example.com These are configured in my local DNS. I'm just not sure how to get past the "empty" subdomain and go to example.com. Adding to this since it might not be clear. If I'm out side the example.com network, on another network, like example123.com, then when I go to example.com I'm redirected to www.example.com as expected, eg, the Apache rewrite rule is working. Thanks in advance for any information.

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• Removing forward lookup zone broke our site - why?

  - by user102469

  I'm fairly new to the job and trying to get to grips with the infrastructure here. We've moved a site from being locally hosted on our own network to an external host (1&1). I've transferred the DNS hosting from the previous DNS host to 1&1 to keep things simple. Once everything had gone through, visitors that were external to our network were being directed to the new site on 1&1 but requests from within our network were still going to our own server. I noticed in the DNS server that there was a forward lookup zone for the site pointing to our own server still. My (admittedly simplistic) understanding was that pausing that zone would then cause the DNS server to get the address for the site from our external DNS servers and our users would start landing on our new site. However, what happened instead was that they were being met with "page not found" type errors. I've resolved it my modifying the forward lookup zone A record to point to the external web server but would like to get an understanding as to why pausing the zone didn't work. Would deleting the zone work? I am reluctant to try that as creating it again will not be as easy as simply pressing "start". Many thanks.

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• no mails routed to/from new Exchange 2010

  - by Michael

  I have an Exchange Server 2003 up and running for years. Now I am in the mid of transition to Exchange Server 2010, I already installed it, put the latest Servicepack on it and everything seems fine, BUT: Mails do not get delivered to MailBoxes on the new Exchange 2010. e.g. when I create a new mailbox on the old server, Emails in and out to/from it work like a charm. But as soon as I move it to the new server, emails get stuck. Noe delivered from outside or old mailboxes, not send out from the new server to enywhere. Sending between Mailboxes on the new Server of course is working. I can see the connectors between old and new Server in the Exchange 2003 Admin Tool, but I cannot find these nowhere on the new server. I have also setup sending connectors at the new server to send out mails directly, but that does not work. In all other areas, the servers are perfectly working together - moving mailboxes between, seeing each other etc. "just" they dont exchange (!) any emails - Any ideas what I missed? I also followed the hints from: Upgrading from Exchange 2003 to Exchange 2010, routing works in one direction only There Emails were transported at least in one direction, in my case they are not transported at all. Both my connectors are up and valid abd have the correct source/target shown on Get-RoutingGroupConnector | FL Kind regards Michael

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• How to install smtp/email server to work with php script?

  - by jiexi

  I have this code $mail->IsSMTP(); $mail->SMTPAuth = true; $mail->SMTPSecure = "ssl"; $mail->Host = "mail.craze.cc"; $mail->Port = 465; $mail->Username = "username"; $mail->Password = "pass"; $mail->SetFrom("[email protected]", "craze.cc"); $mail->AddReplyTo("[email protected]", "craze.cc"); $mail->AddAddress($this->email, $this->username); $mail->IsHTML(false); $mail->Subject = "Activate Your Craze.cc Account"; $mail->Body = $message;`enter code here` How i configure my postfix/sendmail or whatever server to actually work and send the mail? This has been driving me insane! I've tried numerous times to configure these servers. I just want to be able to send emails via my php script... Can someone please link me to a guide to get this all going? or just provide help themselves? Maybe there is an alternative way i can use to send my email in the php script? Basically, i need help just getting the emails to send...

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• Managing multiple Apache proxies simultaneously (mod_proxy_balancer)

  - by Hank

  The frontend of my web application is formed by currently two Apache reverse proxies, using mod_proxy_balancer to distribute traffic over a number of backend application servers. Both frontend reverse proxies, running on separate hosts, are accessible from the internet. DNS round robin distributes traffic over both. In the future, the number of reverse proxies is likely to grow, since the webapplication is very bandwidth-heavy. My question is: how do I keep the state of both reverse balancers / proxies in sync? For example, for maintenance purposes, I might want to reduce the load on one of the backend appservers. Currently I can do that by accessing the Balancer-Manager web form on each proxy, and change the distribution rules. But I have to do that on each proxy manually and make sure I enter the same stuff. Is it possible to "link" multiple instances of mod_proxy_balancer? Or is there a tool out there that connects to a number of instances, and updates all with the same information? Update: The tool should retrieve the runtime status and make runtime changes, just like the existing Balancer-Manager, only for a number of proxies - not just for one. Modification of configuration files is not what I'm interested in (as there are plenty tools for that).

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• Windows 7 x64 wired connection problem. IP, gateway, dns assigned, can't ping. Network detected as "Network"

  - by Emil Lerch

  I am having a problem connecting to a specific wired network with my Latitude E6410 laptop. Other wired networks seem to work fine, but this one does not. I have a coworker with me with the same Intel 82577LM Gigabit Network card, and he can connect just fine. I've updated to the latest Intel drivers (11.8.75.0) and am not using Pro Set. I obtain all DHCP information just fine (IP, netmask, DNS server, default gateway). I cannot ping anything (internal or on the Internet - I tried pinging Google's public DNS servers by IP 8.8.8.8), nor can I get answers to any DNS queries through NS Lookup. Windows troubleshooting says everything is fine, but I can't get DNS responses. I've seen issues like this in the past that were related to link speed/duplex autonegotiaion failures, so I've tried manually setting link speed/duplex to all values one by one with no success. My coworker is using all default settings, so he is just using autonegotiate. Any ideas of other things to try?

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• cannot resolve DNS server's own domain name

  - by sims

  I have a DNS server (mega.dude - 123.123.123.123) running bind 9.4. When I: dig mega.dude I get no answer section. I have nameserver 123.123.123.123 in /etc/resolv.conf Here is my zone file: $TTL 1W @ IN SOA mega.dude. names.mega.dude. ( 2009081502 ; serial 3H ; refresh 15M ; retry 1W ; expiry 1D ) ; minimum NS ns1 NS ns2 MX 10 mail.mega.dude. A 123.123.123.123 @ A 123.123.123.123 ns1 A 123.123.123.123 ns2 A 123.123.123.123 www CNAME @ mail A 123.123.123.123 It didn't used to look like this. I read that it's evil to have an mx record pointing to a CNAME. So I changed that. Then I thought maybe that was also the case for NS. So I changed those too. Still no good. The ports are open. I can't figure it out. Oh by the way, all the other zones return fine. But not the servers own domain. So I know I'm doing something stupid. Thanks for your help all!

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• Why Ubuntu could treat hosts file so strange?

  - by z4y4ts

  I have almost fresh Ubuntu desktop box. OS was installed two weeks ago and updated from karmic repositories. Last week I had no problems with DNS. But this week something had changed. I'm not sure what and when, and not sure whether I changed any configs. So now I have some really weird situation. According to logs name resolving should work normally. /etc/hosts 127.0.0.1 localhost test 127.0.1.1 desktop /etc/host.conf order hosts,bind multi on /etc/resolv.conf # Generated by NetworkManager search search servers obtained via DHCP nameserver 192.168.0.3 /etc/nsswitch.conf passwd: compat group: compat shadow: compat hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4 networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis But if fact it is not. user@test ~ping test PING localhost (127.0.0.1) 56(84) bytes of data. [skip] Pinging is ok. user@test ~host test test.myviacube.com has address xx.xxx.161.201 But pure I suspect that NetworkManager might cause this misbehavior, but don't know where to start to check it. Any thoughts, suggestions?

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• Database mirroring login failure attempts on mirror server

  - by Chandan

  I have configured database mirroring between two servers at a distance 40 miles away from each other. Server specifications: SQL Server 2008,Standard Edition 64-bit This is same for principal,mirror and witness. The configuration is high-safety with automatic failover Initially we tested our .net application(web application) on both the principal and mirror and made sure that the login is not orpahned. Things run fine generally.But sometimes on the mirror server,I see login failed attempts: Login failed for user 'd0main\user'. Reason: Failed to open the explicitly specified database. [CLIENT: xx.xx.x.x] Message Error: 18456, Severity: 14, State: 38. This error appears 3-4 times a day but not more than that. My question to the experts is:If the principal is alive so why the application tries to connect to mirror.The default time-out for a .net webpage is 30 seconds,so is it possible that the application tries to connect principal and after 30 seconds even if principal is alive,it assumes that it is dead and thus tries to open a connection to mirror where it fails. Please help me with this problem.

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• Cannot increase Datastore

  - by k4w4zz

  Hello, We have an ESX 4.0 cluster with 2 hosts, EMC Clarion SAN storage with 10 LUNs. We have added 2 new 400 GB LUNs. All the LUNs are visible from both hosts. I have extended an existing 500 GB datastore with one of these 400 GB LUNs - the new datastore size is now 900 GB. I'd like to do the same operation with the second 400 GB LUN to extend another existing datastore but I'm not able to do it. The LUN is available to create a brand new datastore but is not visible to extend an existing one. I don't understand why everything was fine with the other one and why can't I do the same exact operation with this LUN. The result is the same on both hosts. The SAN admin have erased and re-created several times this LUN. I have rescan the HBA each time. In attachment you can find the result of the esxcfg-mpath -l and fdisk -l commands on both servers. Does somebody have an idea please?

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• Cannot access firewalled jboss server from Internet Explorer

  - by Simon Gibbs

  I've produced a website for a client One Single Menu using JBoss and hosted it on Rackspace Cloud Servers running Ubuntu's Maverick Meerkat. Following advice, I esablished some iptables rule to protect jboss: iptables -I INPUT 1 -i lo -j ACCEPT iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -p tcp --dport 22 -j ACCEPT iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080 iptables -I INPUT -p tcp --dport 8080 -j ACCEPT iptables -t nat -A OUTPUT -o lo -p tcp --dport 80 -j REDIRECT --to-port 8080 iptables -A INPUT -j DROP Now, several versions of IE on several computers on at least two different ISPs cannot access the onesinglemenu.com. Curl from within the datacenter, Firefox, and Safari on the same ISPs can all access the server fine. I even tried IE and Firefox on the same computer and IE failed but Firefox worked. The error behaviour is that IE hangs on connecting without reporting an error, even after a minute or so. No page is displayed at all. I find it quite odd that I'm having a browser specific connection issue, but it appears to be the case. Help!

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• Measure Total Bandwidth for Billing

  - by TonyZ

  I am setting up a new network which customers will host their applications on. It needs to be able to scale out to a few hundred servers and each server will have several VMs on it. Right now in my test environment, after the telco router, we are using a Linux router/firewall which is then connected to a Layer 2 switch. Could be a layer 3 in the future. I need to track total bandwidth per VM for each machine, and I need to do it in a way that it is not part of the VM. Each VM will have a private class ip address which is Natted by the gateway, or we may eventually run more than firewall/reverse proxy off a layer 3 switch. So my thinking is that I can do it off of a promiscuous port on the switches, or at the gateway firewall. I would like to have an out of the box solution, preferably open source. Does anyone have suggestions on the easiest way to set this up, and the easiest tool to use. I have looked at the web sites for Nagios, Zenoss, Zabbix, ntops on the firewall, etc. It is hard to ascertain just from the web sites if they do exactly this or not. Obviously, performance is also somewhat key here. Anything running on the gateway should not drag it down doing traffic accounting. Thanks for any thoughts. Tony Zakula

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• Campus VLAN Segmentation - By OS?

  - by Moduspwnens

  We've been thinking through re-arranging our network and VLAN configuration. Here's the situation. We already have our servers, VoIP phones, and printers on their own VLANs, but our problem lies with end user devices. There are just too many to lump on the same VLAN without being hammered with broadcasts! Our current segmentation strategy has them split into VLANs like this: Student iPads Staff iPads Student Macbooks Staff Macbooks Gaming devices Staff (Other) Student (Other) *Note that our network has many more iPads and MacBooks than most. Since the primary reason we're splitting them is just to put them in smaller groups, this has been working for us (for the most part). However, this required our staff to maintain access control lists (MAC addresses) of all devices belonging in these groups. It also has the unfortunate side effect of illogically grouping broadcast traffic. For example, using this setup, students on opposite ends of campus using iPads will share broadcasts, but two devices belonging to the same user (in the same room) will likely be on completely separate VLANs. I feel like there must be a better way of doing this. I've done a lot of research and I'm having trouble finding instances of this kind of segmentation being recommended. The feedback on the most relevant SO question seems to point toward VLAN segmentation by building/physical location. I feel like that makes sense because logically, at least among miscellaneous end users, broadcasts will typically be intended for nearby devices. Are there other campuses/large-scale networks out there segmenting VLANs based on end-system OS? Is this a typical configuration? Would VLAN segmentation based on physical location (or some other criteria) be more effective? EDIT: I've been told that we will soon be able to dynamically determine device OS without maintaining access lists, although I'm not sure how much that affects the answers to the questions.

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• Wireless disconnects at random after upgrade to Ubuntu 10.4

  - by Daniel Elessedil Kjeserud

  After upgrading my home server from Ubuntu 8.10 to 10.4 my wireless seemingly drops out, even though my IRC client keeps it's connection to the servers, so it looks like the machine just stops taking wireless requests. A ping will give a me this Request timeout for icmp_seq 27 ping: sendto: Host is down After a while the machine just starts responding again, without any interaction from me. When the machine comes back, this is what dmesg gives me [ 18.296288] wlan0: direct probe to AP 00:1b:63:22:a4:5f (try 1) [ 18.296350] wlan0: deauthenticating from 00:1b:63:22:a4:5f by local choice (reason=3) [ 18.296440] wlan0: direct probe to AP 00:1b:63:22:a4:5f (try 1) [ 18.298697] wlan0: direct probe responded [ 18.298706] wlan0: authenticate with AP 00:1b:63:22:a4:5f (try 1) [ 18.306836] wlan0: authenticated [ 18.306886] wlan0: associate with AP 00:1b:63:22:a4:5f (try 1) [ 18.309396] wlan0: RX AssocResp from 00:1b:63:22:a4:5f (capab=0x411 status=0 aid=2) [ 18.309402] wlan0: associated [ 18.310187] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 18.447742] apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac) [ 18.447748] apm: overridden by ACPI. [ 19.163282] padlock: VIA PadLock not detected. [ 28.352022] wlan0: no IPv6 routers present kjes@brin:~$ lspci 02:07.0 Network controller: RaLink RT2561/RT61 rev B 802.11g It's on a wireless network with WPA2, the machine worked without any problems on the same wireless network since Ubuntu 8.10 was the most resent version, and there have been no changes to my network recently. Even though the server drops out, everything else on the network keeps working like normal.

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• Four disks - RAID 10 or two mirrored pairs?

  - by ewwhite

  I have this discussion with developers quite often. The context is an application running in Linux that has a medium amount of disk I/O. The servers are HP ProLiant DL3x0 G6 with four disks of equal size @ 15k rpm, backed with a P410 controller and 512MB of battery or flash-based cache. There are two schools of thought here, and I wanted some feedback... 1). I'm of the mind that it makes sense to create an array containing all four disks set up in a RAID 10 (1+0) and partition as necessary. This gives the greatest headroom for growth, has the benefit of leveraging the higher spindle count and better fault-tolerance without degradation. 2). The developers think that it's better to have multiple RAID 1 pairs. One for the OS and one for the application data, citing that the spindle separation would reduce resource contention. However, this limits throughput by halving the number of drives and in this case, the OS doesn't really do much other than regular system logging. Additionally, the fact that we have the battery RAID cache and substantial RAM seems to negate the impact of disk latency... What are your thoughts?

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• Does NetworkSolutions have a good DNS service?

  - by joxl

  I'm recovering from a DNS disaster and I need some good advice on an alternate solution. My company owns a domain name through NetworkSolutions. Our website is hosted by another company who also maintains our DNS records. Our email is hosted by Google Apps, and the MX records are maintained through the afore-mentioned website/DNS host. Yesterday our website/DNS host had a serious hiccup in some software and completely overwrote all of our DNS records with invalid values; successfully pointing our domain and MX records at the wrong servers. Unfortunately it wasn't caught until it had time to significantly propagate. On top of that, it wasn't fixed until several hours later, combine that with a long TTL on the records; we have customers who are still bouncing emails. Anyhow, I am now completely terrified of this company's ability to do a good job, so I am considering switching to NetworkSolutions for our DNS service. I need the ability to configure A, CNAME, MX, and TXT records, preferably with a nice user interface (our current provider has a poor UI and doesn't support TXT records). Is NetworkSolutions a recommended DNS host? I am a little biased in their direction because the service will be free since we already pay them for our domain name. However I'm curious what others have experienced with their service.

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• Postfix unable to find local server

  - by Andrew

  I'm working with postfix on fedora 9 and I'm attempting to make some changes to a system setup by my predecessor. Currently the postfix server on [mail.ourdomain.com] is setup to forward mail sent to two addresses to another server for processing. The other server [www01.ourdomain.com] receives the email and sends it to a PHP script to be processed. Then that PHP script generates and sends a response to the user who sent the original email. We're adding more web servers to the system and as a result we've decided to move these processing scripts to our admin [admin.ourdomain.com] server to make them easier to keep track of. I've already setup and tested the processing scripts on [admin.ourdomain.com], and on the mail server doing the forwarding [mail.ourdomain.com] I added [admin.ourdomain.com] to /etc/hosts and also added another, aside from the one for [www01.ourdomain.com], entry to /etc/postfix/transport for [admin.ourdomain.com]. I also restarted postfix as well. I've tested the communication from [mail.ourdomain.com] to [admin.ourdomain.com] using telnet and the [admin.ourdomain.com] domain and everything runs correctly. But as soon as I change the forward address and attempt to send an email to the mail server I get a bounce message stating "Host or domain name not found. Name service error for name=admin.ourdomain.com type=A: Host not found". If I change the forward settings back to [www01.ourdomain.com] then everything works fine. Is there some setting I'm missing in Postfix? The server itself and telnet work fine it just seems to be postfix that's not able to discover the location of [admin.ourdomain.com].

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• Xen Windows Guest spawn doesn't spawn a vnc display

  - by Henrik P. Hessel

  I'm using this HVM File to create a new guest kernel = "/usr/lib/xen-3.2-1/boot/hvmloader" builder='hvm' memory = 4096 # Should be at least 2KB per MB of domain memory, plus a few MB per vcpu. shadow_memory = 64 name = "hessel-windows2008" vif = [ 'ip=188.40.xx.xx,mac=00:16:3E:C1:8F:CE' ] acpi = 1 apic = 1 disk = [ 'file:/home/xen/disks/hessel/win2008/win2008.img,hda,w', 'file:/home/xen/isopool/win2008_32.iso,hdc:cdrom,r' ] device_model = '/usr/lib/xen/bin/qemu-dm' #----------------------------------------------------------------------------- # boot on floppy (a), hard disk (c) or CD-ROM (d) # default: hard disk, cd-rom, floppy boot="dc" sdl=0 vnc=1 vncdisplay=1 vnclisten="0.0.0.0" vncconsole=1 vncpasswd='howtoforge' stdvga=0 serial='pty' usbdevice='tablet' The guest is created without an error. But no vnc display is created. Any ideas, how to fix that? prometheus:~# netstat -ant Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:615 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:53 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:6010 0.0.0.0:* LISTEN tcp 0 232 188.40.xx.xx:8080 195.36.75.26:54032 ESTABLISHED tcp 0 0 188.40.xx.xx:8080 195.36.75.26:53085 ESTABLISHED tcp6 0 0 :::8080 :::* LISTEN tcp6 0 0 :::53 :::* LISTEN tcp6 0 0 :::22 :::* LISTEN tcp6 0 0 ::1:6010 :::* LISTEN

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• SQL Server 2008 Cluster Installation - First network name always fails

  - by boflynn

  I'm testing failover clustering in Windows Server 2008 to host a SQL Server 2008 installation using this installation guide. My base cluster is installed and working properly, as well as clustering the DTC service. However, when it comes time to install SQL Server, my first attempt at installation always fails with the same message and seems to "taint" the network name. For example, with my previous cluster attempt, I was installing SQL Server as VSQL. After approximately 15 attempts of installation and trying to resolve the errors, e.g. changing domain accounts for SQL, setting SPNs, etc., I typoed the network name as VQSL and the installation worked. Similarly on my current cluster, I tried installing with the SQL service named PROD-C1-DB and got the same errors as last time until I tried changing the name to anything else, e.g. PROD-C1-DB1, SQL, TEST, etc., at which point the install works. It will even install to VSQL now. While testing, my install routine was: Run setup.exe from patched media, selecting appropriate options After the install fails, I'd chose "Remove node from a SQL Server failover cluster" and remove the single, failed, node Attempt to diagnose problem, inspect event logs, etc. Delete the computer account that was created for the SQL Service from Active Directory Delete the MSSQL10.MSSQLSERVER folder from the shared data drive The error message I receive from the SQL Server installer is: The following error has occurred: The cluster resource 'SQL Server' could not be brought online. Error: The group or resource is not in the correct state to perform the requested operation. (Exception from HRESULT: 0x8007139F) Along with hundreds of the following errors in the Application event log: [sqsrvres] checkODBCConnectError: sqlstate = 28000; native error = 4818; message = [Microsoft][SQL Server Native Client 10.0][SQL Server]Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'. System configuration notes: Windows Server 2008 Enterprise Edition x64 SQL Server 2008 Enterprise Edition x64 using slipstreamed SP1+CU1 media Dell PowerEdge servers Fibre attached storage

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• SQL 2008 Backups to UNC Share Failing 0xC002F210

  - by Matty Brown

  This problem is driving me NUTS!! We take backups of all of our production databases to a network share, which are then backed up to tape nightly. 8pm Mon-Fri - Full backup, followed by log backup 7am-7pm Mon-Fri, at half-hour interval - Log backup Our backups have been working in this manner since we migrated from SQL Server Standard 2000 to 2008, 3 years ago. Recently, the first log backup on Mondays have been failing. Not every time, but almost every time! The rest of the week, we've had no problems. I guess the issue may have something to do with the size of the log backup that's attempted after a weekend of no backups. Now onto the issue I need a fix for... All this week, every full backup on our biggest two databases have failed (Both backups < 1GB compressed). There's plenty of disk space on the source and destination servers. I'm guessing the issue is to do with the amount of time it takes to complete the backups of these databases, and/or the size of the backup files required to complete these backups. Changing the backup destination to local storage works fine (and very, very fast in comparison). From the Job History, I can find a few hints as to what the problem could be... Code: 0xC002F210 (Always this code, but a mix of the following descriptions...) "The operating system returned the error '64(failed to retrieve text for this error. Reason: 1815)' while attempting 'SetEndOfFile' on '\drserver\SQLBackups\Database.bak'. BACKUP DATABASE is terminating abnormally. "The operating system returned the error '64(failed to retrieve text for this error. Reason: 1815)' while attempting 'FlushFileBuffers' on '\drserver\SQLBackups\Database.bak'. BACKUP DATABASE is terminating abnormally. Please help save my hair and sanity!!

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