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• scanning only works under "sudo" (Ubuntu)

  - by JoelFan

  When I try to scan, using simple-scan, the UI says Failed to scan -- Unable to connect to scanner. When I run it from the command line I get: joel@home:/usr/bin$ simple-scan -d ** (simple-scan:6554): DEBUG: Starting Simple Scan 2.32.0.1, PID=6554 ** (simple-scan:6554): DEBUG: Restoring window to 600x400 pixels ** (simple-scan:6554): DEBUG: sane_init () -> SANE_STATUS_GOOD ** (simple-scan:6554): DEBUG: SANE version 1.0.22 ** (simple-scan:6554): DEBUG: Requesting redetection of scan devices ** (simple-scan:6554): DEBUG: Processing request ** (simple-scan:6554): DEBUG: Requesting scan at 300 dpi from device '(null)' ** (simple-scan:6554): DEBUG: scanner_scan ("(null)", 300, SCAN_SINGLE) ** (simple-scan:6554): DEBUG: sane_get_devices () -> SANE_STATUS_GOOD ** (simple-scan:6554): DEBUG: Device: name="brother2:bus4;dev1" vendor="Brother" model="MFC-210C" type="USB scanner" ** (simple-scan:6554): DEBUG: Processing request ** (simple-scan:6554): DEBUG: sane_open ("brother2:bus4;dev1") -> SANE_STATUS_IO_ERROR ** (simple-scan:6554): WARNING **: Unable to get open device: Error during device I/O FYI, I have already done: joel@home:~$ sudo chmod a+rwx /dev/bus/usb joel@home:~$ sudo chmod a+rwx /dev/bus/usb/* If I run under sudo: joel@home:~$ sudo simple-scan it works. How can I get simple-scan to work without sudo?

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• Netdom to restore machine secret

  - by icelava

  I have a number of virtual machines that have not been switched on for over a month, and some others which have been rolled back to an older state. They are members of a domain, and have expired their machine secrets; thus unable to authenticate with the domain any longer. Event Type: Warning Event Source: LSASRV Event Category: SPNEGO (Negotiator) Event ID: 40960 Date: 14/05/2009 Time: 10:24:54 AM User: N/A Computer: TFS2008WDATA Description: The Security System detected an authentication error for the server ldap/iceland.icelava.home. The failure code from authentication protocol Kerberos was "The attempted logon is invalid. This is either due to a bad username or authentication information. (0xc000006d)". For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: c000006d Event Type: Warning Event Source: LSASRV Event Category: SPNEGO (Negotiator) Event ID: 40960 Date: 14/05/2009 Time: 10:24:54 AM User: N/A Computer: TFS2008WDATA Description: The Security System detected an authentication error for the server cifs/iceland.icelava.home. The failure code from authentication protocol Kerberos was "The attempted logon is invalid. This is either due to a bad username or authentication information. (0xc000006d)". For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: c000006d Event Type: Error Event Source: NETLOGON Event Category: None Event ID: 3210 Date: 14/05/2009 Time: 10:24:54 AM User: N/A Computer: TFS2008WDATA Description: This computer could not authenticate with \\iceland.icelava.home, a Windows domain controller for domain ICELAVA, and therefore this computer might deny logon requests. This inability to authenticate might be caused by another computer on the same network using the same name or the password for this computer account is not recognized. If this message appears again, contact your system administrator. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: c0000022 So I try to use netdom to re-register the machine back to the domain C:\Documents and Settings\Administrator>netdom reset tfs2008wdata /domain:icelava /UserO:enterpriseadmin /PasswordO:mypassword Logon Failure: The target account name is incorrect. The command failed to complete successfully. But have not been successful. I wonder what else needs to be done?

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• How can I change the amount of video memory with a Mobile Intel 4 Series Express Chipset?

  - by user45924

  I have the chipset in the title. The Intel control panel says the following: Intel® Graphics Media Accelerator Driver for Mobile Report Report Date: 8/11/2010 Report Time[hr:mm:ss]: 20:2:54 Driver Version: 8.15.10.2182 Operating System: Windows 7 (6.1.7600) Default Language: English (Canada) DirectX* Version: 10.0 Physical Memory: 3963 MB Minimum Graphics Memory: 128 MB Maximum Graphics Memory: 1759 MB Graphics Memory in Use: 17 MB Processor: Intel64 Family 6 Model 23 Stepping 10 Processor Speed: 1995 MHz Vendor ID: 8086 Device ID: 2A42 Device Revision: 07 Even while playing games, the Graphics Memory in Use only ever goes up to 26 MB. I've looked in the BIOS; there's nothing there. Is there any way I can force it to go higher? Thanks :)

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• Does HP 8530w support Wifi 802.11n?

  - by FoxyBOA

  According to vendor site HP 8530w supports 802.11n draft mode. My Windows 7 tell me that network card is 5100 ABG and know nothing about N mode (guys from Intel forum mentioned, that 802.11N versions must ended with N letter, e.g. 5100 ABN). Not sure if it matter, but my laptop model id is #FU462EA. How could I check that my Wifi card compliant with 802.11n (I suspect that "draft N" could have two "special" meaning: doesn't work with 802.11n at all or requires special activation of the mode). Any hints are welcome.

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• Ideas for scaling out database architecture

  - by andrew

  We're looking to scale out our existing database architecture and need some advice on which way to go. We currently have 2 web servers behind a load balancer that both read & write to a single master database which replicates to a slave. Ideally, I'd like each of the webservers to point to their own master DB and have the data between the 2 synchronised but from what I've read, using any kind of master-master or ring-replication is discouraged. I'm looking for a general "what do other people do" kind of answer - database vendor isn't a concern at the moment but we'd like to stay with MySQL or convert to MSSQL. Any ideas would be gratefully received. Many thanks, Andrew

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• Are there any vendors making a Gigabit Fiber solution for laptops?

  - by romandas

  I'm trying to build a laptop system that can connect to just about any network you might come across in a large enterprise. I realize I can use a media converter to go from twisted pair to fiber but prefer to have a NIC instead of a converter. Is there a vendor out there that actually makes a gigabit ethernet fiber adapter for laptops? Edit: A year after I asked this question, apparently Allied Telesis came out with the AT-2872SX ExpressCard which has an SC connector for Gigabit Ethernet. See syneticon-dj's answer below.

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• Messages released from MailScanner quarantine are marked as DUPLICATEDELIVER in Exchange 2007

  - by kdl

  I have installed Postfix with MailScanner on CentOS 5.4 as a smarthost for Exchange 2007. When a message gets quarantined and I later release it (http://wiki.mailscanner.info/doku.php?id=documentation%3Aconfiguration%3Amta%3Apostfix%3Ahow%5Fto%3Arelease%5Fquarantined%5Fmail), it gets delivered to the Exhcange box but does not appear in a user's mailbox. Exchange message tracking log shows the message is marked as DUPLICATEDELIVER and therefore dropped. How can I work around this situation? Maybe changing a message ID somehow while at the Postfix box or some other way? Thanks.

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• Issues after upgrading the servers PHP version

  - by Harish Kurup

  I have created my project in Symfony 1.4.8 with Propel ORM. previously server had PHP version 5.2.* and i have upgraded it to 5.3.4, then the problem started giving some error in Propel. the errors were, PHP Deprecated: Directive 'magic_quotes_gpc' is deprecated in PHP 5.3 and greater in Unknown on line 0 PHP Fatal error: Class 'PDO' not found in /usr/local/lib/php/symfony/plugins/sfPropelPlugin/lib/vendor/propel/util/PropelPDO.php on line 42 PHP Warning: Module 'PDO' already loaded in Unknown on line 0 PHP Warning: Module 'pdo_sqlite' already loaded in Unknown on line 0 PHP Warning: Module 'SQLite' already loaded in Unknown on line 0 Is there any config error that has to be taken care of?? please help!

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• Lync 2010, Kamailio, & Trixbox 2.6.23 (Asterisk 1.4)

  - by slashp

  I'm having an issue trying to connect Lync 2010 phone calls with our trixbox PBX. I've gotten to the point where Kamailio seems to be functioning properly and acting as a bridge between TCP traffic (from Lync) & UDP traffic (to the trixbox, as Asterisk 1.4 does not support SIP over TCP). Our Lync box IP: 10.100.10.41 Our Kamailio box IP: 10.100.10.44 Our trixbox IP: 10.100.10.2 The issue I'm running into is as follows when enabling SIP debugging for the Kamailio box: <--- SIP read from 10.100.10.44:5060 ---> PRACK sip:TNECLTSLY01.contoso.com:5068;transport=Tcp;maddr=10.100.10.41 SIP/2.0 FROM: <sip:9121;[email protected];user=phone>;epid=CF2380792B;tag=4852bab430 TO: <sip:[email protected];user=phone>;epid=CF2380792B;tag=3684a6a24e CSEQ: 24 PRACK CALL-ID: 192daae6-00e1-4140-bddd-0394b35d475b MAX-FORWARDS: 70 Via: SIP/2.0/UDP 10.100.10.44;branch=z9hG4bKcydzigwkX;i=d VIA: SIP/2.0/TCP 10.100.10.41:51677;branch=z9hG4bK159fc989 CONTACT: <sip:TNECLTSLY01.contoso.com:5068;transport=Tcp;maddr=10.100.10.41> CONTENT-LENGTH: 0 USER-AGENT: RTCC/4.0.0.0 MediationServer RAck: 1 23 INVITE <-------------> --- (12 headers 0 lines) --- Sending to 10.100.10.44 : 5060 (NAT) <--- Transmitting (NAT) to 10.100.10.44:5060 ---> SIP/2.0 481 Call leg/transaction does not exist Via: SIP/2.0/UDP 10.100.10.44;branch=z9hG4bKcydzigwkX;i=d;received=10.100.10.44 Via: SIP/2.0/TCP 10.100.10.41:51677;branch=z9hG4bK159fc989 From: <sip:9121;[email protected];user=phone>;epid=CF2380792B;tag=4852bab430 To: <sip:[email protected];user=phone>;epid=CF2380792B;tag=3684a6a24e Call-ID: 192daae6-00e1-4140-bddd-0394b35d475b CSeq: 24 PRACK User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Content-Length: 0 <------------> trixbox1*CLI> <--- SIP read from 10.100.10.44:5060 ---> ACK sip:[email protected];user=phone SIP/2.0 FROM: "John Jones"<sip:9121;[email protected];user=phone>;tag=4852bab430;epid=CF2380792B TO: <sip:[email protected];user=phone>;tag=3684a6a24e;epid=CF2380792B CSEQ: 23 ACK CALL-ID: 192daae6-00e1-4140-bddd-0394b35d475b MAX-FORWARDS: 70 Via: SIP/2.0/UDP 10.100.10.44;branch=z9hG4bKcydzigwkX;i=d VIA: SIP/2.0/TCP 10.100.10.41:51677;branch=z9hG4bK79a21c CONTENT-LENGTH: 0 My SIP trunk on the trixbox looks like this: [from-lync] exten => _+4XXX!,1,Noop(Stripping + from start of number) exten => _+4XXX!,n,Goto(from-internal,${EXTEN:1}) Though I am still having no luck getting the + stripped or the call to go through. Any ideas would be greatly appreciated. Thank you! -slashp

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• Dicom: What are my options?

  - by Peter Turner

  After a cursory Googling, I can't find a legitimate list of DICOM vendors. I've tried DCM4Chee, Conquest, and PacsOne. Each server seems to have it's own quirks and annoyances, memory leaks, etc... I'd like to see what people use for their DICOM servers. Usually Wikipedia would have something like this at the bottom of the article, but it doesn't so I'm wondering if the SF community can create a canonical list. I must admit that whereas I do not represent any DICOM server vendor. There is a guy in my office who will buy me a huge burrito for each DICOM server I successfully install.

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• Newbie ask Swap Value: How much Swap do I have?

  - by Cintaku

  When looking vmstat, this is what I got: procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 1 0 0 2872 0 0 0 0 8 17 0 14 3 1 94 2 0 the cache is 0. I have no idea how much the whole swap I have. But when not enough RAM (256 MB), the swap will be used and look like below: procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 3 1 2468 0 0 0 0 0 8 17 0 16 3 1 94 2 0

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• WebDAV "PROPFIND" exception in IIS due to network share?

  - by jacko

  Hi all, We're finding continuous exceptions in our event viewer on our live box to the following exception: [snippet] Process information: Process ID: 3916 Process name: w3wp.exe Account name: NT AUTHORITY\NETWORK SERVICE Exception information: Exception type: HttpException Exception message: Path 'PROPFIND' is forbidden. Thread information: Thread ID: 14 Thread account name: OURDOMAIN\Account Is impersonating: True Stack trace: at System.Web.HttpMethodNotAllowedHandler.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Other Specs: Windows Server 2003 R2 & IIS 6.0 We've narrowed it down to occuring when people try to access shares on the box from within the network, and have discovered (we think) that its due to the WebDAV web services extension being previously disabled by past staff. The exceptions are being thrown when trying to access directories that are virtual dirs in IIS, and plain old UNC network shares What the implications for enabling the WebDAV extensions on our live web server? And will this solve our problems with the exceptions in our event log?

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• My sendmail sends spam and I can't identify which script sends it

  - by Andrew

  I've noticed one of my server is sending mass spam. The messages are like the one below (sending from: [email protected]). I've deleted USER_ACCOUNT but I'd like to know how can I identify the script (probably a hacked PHP script) that sends the mass mail considering this server hosts numerous websites. I0/83/968855 Mreturntosender: cannot select queue for postmaster: Broken pipe Fbn $_Unknown UID 1008@localhost ${daemon_flags}c u SUSER_ACCOUNT [email protected] H?P?Return-Path: <?g> H??Received: (from Unknown UID 1008@localhost) by benedictus.MYDOMAIN.COM (8.14.3/8.14.3/Submit) id q5H8Bx9A066412; Sun, 17 Jun 2012 11:11:59 +0300 (EEST) (envelope-from USER_ACCOUNT) H?D?Date: Sun, 17 Jun 2012 11:11:59 +0300 (EEST) H?M?Message-Id: <[email protected]> H??From: Tiffany June <[email protected]> H??To: "Fernando" <[email protected]> H??Subject: Tiffany June ADDED YOU to her Private Wish List H??MIME-Version: 1.0 H??Content-Type: multipart/related; boundary="=_8b944d33596415b2dd4371ef94e08aee

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• How can I determine which named property (or properties) are filling my exchange 2007 information st

  - by Mikey B

  Hi Guys, I'm experiencing the following error on an Exchange 2007 server: Event ID: 9667 Type: Error Category: General Source: msgidNamedPropsQuotaError Description: Failed to create a new named property for database "" because the number of named properties reached the quota limit (). User attempting to create the named property: . Named property GUID: . Named property name/id: . I understand that this can occur if the exchange information store is filling up with named properties... but I don't know how to determine which specific named property is at fault here. Is there a way to examine the DB for this type of info to see if there's a specific recurring named property that is consuming resources? -M

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• Win 7 slow Log off on Domain

  - by e2e2

  Our Windows 7 computers/laptops are very slow at logoff, around 7 minutes (no problem at log on). We don't have this issue on XP clients. Problem occurs after adding the Win7 clients on domain. I tried to reset user profile. After resetting logoff takes around 2 minuted and after everyday it takes longer and longer We are using roaming profiles. Event Viewer: Event ID: 6005 The winlogon notification subscriber is taking long time to handle the notification event (Logoff). And then a minute later Event ID: 6006 - The winlogon notification subscriber took 300 second(s) to handle the notification event (Logoff).

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• mongoexport csv output array values

  - by 9point6

  I'm using mongoexport to export some collections into CSV files, however when I try to target fields which are members of an array I cannot get it to export correctly. command I'm using: mongoexport -d db -c collection -fieldFile fields.txt --csv > out.csv and the contents of fields.txt is similar to id name address[0].line1 address[0].line2 address[0].city address[0].country address[0].postcode where the BSON data would be: { "id": 1, "name": "example", "address": [ { "line1": "flat 123", "line2": "123 Fake St.", "city": "London", "country": "England", "postcode": "N1 1AA" } ] } what is the correct syntax for exporting the contents of an array?

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• Trouble recovering MySQL InnoDB database after server crash

  - by Andy Shinn

  I had a server crash due to a broken iSCSI link (the filesystem went into read-only mode). After repairing the link and rebooting the machine (CentOS 5 / MySQL 5.1), the MySQL server would not start and gave the following error: 100603 19:11:46 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! 100603 19:11:46 InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery. InnoDB: Reading tablespace information from the .ibd files... InnoDB: Restoring possible half-written data pages from the doublewrite InnoDB: buffer... InnoDB: Warning: database page corruption or a failed InnoDB: file read of page 112541. InnoDB: Trying to recover it from the doublewrite buffer. InnoDB: Dump of the page: 100603 19:11:46 InnoDB: Page dump in ascii and hex (16384 bytes): lots of binary data 100603 19:11:46 InnoDB: Page checksum 953720272, prior-to-4.0.14-form checksum 2641912043 InnoDB: stored checksum 617821918, prior-to-4.0.14-form stored checksum 2080617765 InnoDB: Page lsn 115 2632899642, low 4 bytes of lsn at page end 2641594600 InnoDB: Page number (if stored to page already) 112541, InnoDB: space id (if created with = MySQL-4.1.1 and stored already) 0 InnoDB: Page may be an index page where index id is 0 616 InnoDB: Dump of corresponding page in doublewrite buffer: 100603 19:11:46 InnoDB: Page dump in ascii and hex (16384 bytes): more binary data 100603 19:11:46 InnoDB: Page checksum 908374788, prior-to-4.0.14-form checksum 824841363 InnoDB: stored checksum 912869634, prior-to-4.0.14-form stored checksum 2210927931 InnoDB: Page lsn 115 2635312169, low 4 bytes of lsn at page end 2633173354 InnoDB: Page number (if stored to page already) 112541, InnoDB: space id (if created with = MySQL-4.1.1 and stored already) 0 InnoDB: Page may be an index page where index id is 0 616 InnoDB: Also the page in the doublewrite buffer is corrupt. InnoDB: Cannot continue operation. InnoDB: You can try to recover the database with the my.cnf InnoDB: option: InnoDB: innodb_force_recovery=6 100603 19:11:46 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended Per the error message, I have tried setting set-variable=innodb_force_recovery=6 in the my.cnf to get to the data. This allows the MySQL server to start. But when I try to do a mysqldump of the database or a SELECT * INTO OUTFILE "filename" FROM broken_table; it seems to endlessly just export the same line over and over again. I have also tried http://code.google.com/p/innodb-tools/. But this tool fails with an error that 'blob' type is not supported. If I try to access the data using the PHP application it crashes MySQL: `100603 19:19:19 - mysqld got signal 11 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. key_buffer_size=8384512 read_buffer_size=131072 max_used_connections=2 max_threads=151 threads_connected=2 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 338317 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0x15d33f0 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 0x453aff00 thread_stack 0x40000 /usr/libexec/mysqld(my_print_stacktrace+0x24) [0x874364] /usr/libexec/mysqld(handle_segfault+0x346) [0x5c9166] /lib64/libpthread.so.0 [0x3a6e40eb10] /usr/libexec/mysqld(rec_get_offsets_func+0x30) [0x7cc310] /usr/libexec/mysqld [0x7674d8] /usr/libexec/mysqld(btr_search_info_update_slow+0x638) [0x768d48] /usr/libexec/mysqld(btr_cur_search_to_nth_level+0xc7d) [0x75f86d] /usr/libexec/mysqld [0x7dd1c1] /usr/libexec/mysqld(row_search_for_mysql+0x18b0) [0x7e03d0] /usr/libexec/mysqld(ha_innobase::general_fetch(unsigned char*, unsigned int, unsigned int)+0x7c) [0x7526fc] /usr/libexec/mysqld(handler::read_multi_range_next(st_key_multi_range**)+0x29) [0x6aed09] /usr/libexec/mysqld(QUICK_RANGE_SELECT::get_next()+0x194) [0x69a964] /usr/libexec/mysqld [0x6aafe9] /usr/libexec/mysqld(sub_select(JOIN*, st_join_table*, bool)+0x56) [0x635196] /usr/libexec/mysqld [0x63f9cd] /usr/libexec/mysqld(JOIN::exec()+0x950) [0x6497c0] /usr/libexec/mysqld(mysql_select(THD*, Item*, TABLE_LIST*, unsigned int, List&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsign ed long long, select_result*, st_select_lex_unit*, st_select_lex*)+0x17b) [0x64b34b] /usr/libexec/mysqld(handle_select(THD*, st_lex*, select_result*, unsigned long)+0x169) [0x64bc79] /usr/libexec/mysqld [0x5d34b6] /usr/libexec/mysqld(mysql_execute_command(THD*)+0x4e5) [0x5d6b45] /usr/libexec/mysqld(mysql_parse(THD*, char const*, unsigned int, char const)+0x211) [0x5dc321] /usr/libexec/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x10b8) [0x5dd3f8] /usr/libexec/mysqld(do_command(THD*)+0xe6) [0x5dd9e6] /usr/libexec/mysqld(handle_one_connection+0x73d) [0x5d036d] /lib64/libpthread.so.0 [0x3a6e40673d] /lib64/libc.so.6(clone+0x6d) [0x3a6d4d3d1d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd-query at 0x15de5e0 = SELECT DISTINCT count(DISTINCT i.itemid) as rowscount,i.hostid FROM items i WHERE ((i.itemid BETWEEN 000000000000000 AND 0999999 99999999)) AND i.type<9 AND (i.hostid IN (10017,10047,10050,10054,10056,10059,10062,10063,10064,10065,10066,10067,10068,10069,10070,10071,10072,10073,100 74,10075,10076,10077,10078,10079,10080,10081,10082,10084,10088,10089,10090,10091,10092,10093,10094,10095,10096,10097,10098,10099,10100,10101,10102,10103,10 104,10105,10106,10107,10108,10109)) GROUP BY i.hostid thd-thread_id=3 thd-killed=NOT_KILLED The manual page at contains information that should help you find out what is causing the crash. 100603 19:19:19 mysqld_safe Number of processes running now: 0 100603 19:19:19 mysqld_safe mysqld restarted` Before recovering form an older backup as a last resort I am looking for anymore suggestions. Thanks!

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• Mysterious login attempts to windows server

  - by Jim Balo

  I have a Windows 2008R2 server that is reporting failed login attempts from a number of workstations on our network. Some event log details: Event ID 4625, Status: 0xc000006d, Sub Status: 0xc0000064 Security ID: NULL SID, Account Name: joedoe, Account Domain: Acme Workstation Name: WINXP1, Source Network Address: 192.168.1.23, Source Port: 1904 Logon Process: NtLmSsp, Authentication Package: NTLM, Logon Type: 3 (network) I believe this is coming from some netbios service or similar (maybe the file explorer), keeping an inventory of its network neighborhood and also trying to authenticate. Is there a way to turn this off without having to turn off file sharing all together? In other words, clients authenticating against file servers that they use is of course no problem, but I want to eliminate clients trying to authenticate to servers that they are not using and have no business with. The above example is only one of thousands of log alerts for similar failed network authentications. What can I do to clean this up / handle this? Thanks.

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• Performance of ClearCase servers on VMs?

  - by Garen

  Where I work, we are in need of upgrading our ClearCase servers and it's been proposed that we move them into a new (yet-to-be-deployed) VMmare system. In the past I've not noticed a significant problem with performance with most applications when running in VMs, but given that ClearCase "speed" (i.e. dynamic-view response times) is so latency sensitive I am concerned that this will not be a good idea. VMWare has numerous white-papers detailing performance related issues based on network traffic patterns that re-inforces my hypothesis, but nothing particularly concrete for this particular use case that I can see. What I can find are various forum posts online, but which are somewhat dated, e.g.: ClearCase clients are supported on VMWare, but not for performance issues. I would never put a production server on VM. It will work but will be slower. The more complex the slower it gets. accessing or building from a local snapshot view will be the fastest, building in a remote VM stored dynamic view using clearmake will be painful..... VMWare is best used for test environments (via http://www.cmcrossroads.com/forums?func=view&catid=31&id=44094&limit=10&start=10) and: VMware + ClearCase = works but SLUGGISH!!!!!! (windows)(not for production environment) My company tried to mandate that all new apps or app upgrades needed to be on/moved VMware instances. The VMware instance could not handle the demands of ClearCase. (come to find out that I was sharing a box with a database server) Will you know what else would be on that box besides ClearCase? Karl (via http://www.cmcrossroads.com/forums?func=view&id=44094&catid=31) and: ... are still finding we can't get the performance using dynamic views to below 2.5 times that of a physical machine. Interestingly, speaking to a few people with much VMWare experience and indeed from running builds, we are finding that typically, VMWare doesn't take that much longer for most applications and about 10-20% longer has been quoted. (via http://www.cmcrossroads.com/forums?func=view&catid=31&id=44094&limit=10&start=10) Which brings me to the more direct question: Does anyone have any more recent experience with ClearCase servers on VMware (if not any specific, relevant performance advice)?

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• Tape Supplier in Canada

  - by JohnyD

  I'm not sure if it's kosher to ask.. but where can one purchase good quality / well priced backup tapes within Canada, online? I'm asking because my current vendor, DataWrite, has sent me bad tapes for the 3rd time in a row. I have no idea where they get their product but when I put an order in for 20 tapes and 2 cleaning tapes and I have to call them up 4 times over the next 2 weeks, I expect those tapes to work. Well, like I said, this is the 3rd batch that I'm sending back and we've been dealing with them exclusively for well over 5 years so I thought I'd ask the pool of knowledge. I'm currently looking for DAT72 tapes but soon will be looking for LTO-3 and LTO-4. Thank you

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• Monitoring HP and Dell hardware in Gentoo.

  - by ewwhite

  I'm working in an environment that features a large number of Gentoo servers running on HP ProLiant and Dell PowerEdge equipment. While I've moved some of these systems to RedHat or CentOS for consistency, I'm still left with a good number of systems that will remain Gentoo. One of the issues I see with the Gentoo arrangement is lack of vendor-supported hardware monitoring. There doesn't seem to be an equivalent to the HP ProLiant Support Pack or Dell's agents for Gentoo. Is this simply something that you give up when using this distribution? How do you monitor hardware health and the like with Gentoo systems?

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• NetApp erroring with: STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT

  - by Sobrique

  Since a sitewide upgrade to Windows 7 on desktop, I've started having a problem with virus checking. Specifically - when doing a rename operation on a (filer hosted) CIFS share. The virus checker seems to be triggering a set of messages on the filer: [filerB: auth.trace.authenticateUser.loginTraceIP:info]: AUTH: Login attempt by user server-wk8-r2$ of domain MYDOMAIN from client machine 10.1.1.20 (server-wk8-r2). [filerB: auth.dc.trace.DCConnection.statusMsg:info]: AUTH: TraceDC- attempting authentication with domain controller \\MYDC. [filerB: auth.trace.authenticateUser.loginRejected:info]: AUTH: Login attempt by user rejected by the domain controller with error 0xc0000199: STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT. [filerB: auth.trace.authenticateUser.loginTraceMsg:info]: AUTH: Delaying the response by 5 seconds due to continuous failed login attempts by user server-wk8-r2$ of domain MYDOMAIN from client machine 10.1.1.20. This seems to specifically trigger on a rename so what we think is going on is the virus checker is seeing a 'new' file, and trying to do an on-access scan. The virus checker - previously running as LocalSystem and thus sending null as it's authentication request is now looking rather like a DOS attack, and causing the filer to temporarily black list. This 5s lock out each 'access attempt' is a minor nuisance most of the time, and really quite significant for some operations - e.g. large file transfers, where every file takes 5s Having done some digging, this seems to be related to NLTM authentication: Symptoms Error message: System error 1808 has occurred. The account used is a computer account. Use your global user account or local user account to access this server. A packet trace of the failure will show the error as: STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT (0xC0000199) Cause Microsoft has changed the functionality of how a Local System account identifies itself during NTLM authentication. This only impacts NTLM authentication. It does not impact Kerberos Authentication. Solution On the host, please set the following group policy entry and reboot the host. Network Security: Allow Local System to use computer identity for NTLM: Disabled Defining this group policy makes Windows Server 2008 R2 and Windows 7 function like Windows Server 2008 SP1. So we've now got a couple of workaround which aren't particularly nice - one is to change this security option. One is to disable virus checking, or otherwise exempt part of the infrastructure. And here's where I come to my request for assistance from ServerFault - what is the best way forwards? I lack Windows experience to be sure of what I'm seeing. I'm not entirely sure why NTLM is part of this picture in the first place - I thought we were using Kerberos authentication. I'm not sure how to start diagnosing or troubleshooting this. (We are going cross domain - workstation machine accounts are in a separate AD and DNS domain to my filer. Normal user authentication works fine however.) And failing that, can anyone suggest other lines of enquiry? I'd like to avoid a site wide security option change, or if I do go that way I'll need to be able to supply detailed reasoning. Likewise - disabling virus checking works as a short term workaround, and applying exclusions may help... but I'd rather not, and don't think that solves the underlying problem. EDIT: Filers in AD ldap have SPNs for: nfs/host.fully.qualified.domain nfs/host HOST/host.fully.qualified.domain HOST/host (Sorry, have to obfuscate those). Could it be that without a 'cifs/host.fully.qualified.domain' it's not going to work? (or some other SPN? ) Edit: As part of the searching I've been doing I've found: http://itwanderer.wordpress.com/2011/04/14/tread-lightly-kerberos-encryption-types/ Which suggests that several encryption types were disabled by default in Win7/2008R2. This might be pertinent, as we've definitely had a similar problem with Keberized NFSv4. There is a hidden option which may help some future Keberos users: options nfs.rpcsec.trace on (This hasn't given me anything yet though, so may just be NFS specific). Edit: Further digging has me tracking it back to cross domain authentication. It looks like my Windows 7 workstation (in one domain) is not getting Kerberos tickets for the other domain, in which my NetApp filer is CIFS joined. I've done this separately against a standalone server (Win2003 and Win2008) and didn't get Kerberos tickets for those either. Which means I think Kerberos might be broken, but I've no idea how to troubleshoot further. Edit: A further update: It looks like this may be down Kerberos tickets not being issued cross domain. This then triggers NTLM fallback, which then runs into this problem (since Windows 7). First port of call will be to investigate the Kerberos side of things, but in neither case do we have anything pointing at the Filer being the root cause. As such - as the storage engineer - it's out of my hands. However, if anyone can point me in the direction of troubleshooting Kerberos spanning two Windows AD domains (Kerberos Realms) then that would be appreciated. Options we're going to be considering for resolution: Amend policy option on all workstations via GPO (as above). Talking to AV vendor about the rename triggering scanning. Talking to AV vendor regarding running AV as service account. investigating Kerberos authentication (why it's not working, whether it should be).

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• What is Causing this IIS 7 Web Service Sporadic Connectivity Error?

  - by dpalau

  On sporadic occasions we receive the following error when attempting to call an .asmx web service from a .Net client application: "The underlying connection was closed: A connection that was expected to be kept alive was closed by the server. Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host." By sporadic I mean that it might occur zero, once every few days, or a half-dozen times a day for some users. It will never occur for the first web service call of a user. And the subsequent (usually the same) call will always work immediately after the failure. The failures happen across a variety of methods in the service and usually happens between 15-20 seconds (according to the log) from the time of the request. Looking in the IIS site log for the particular call will show one or the other of the following windows error codes: 121: The semaphore timeout period has elapsed. 1236: The network connection was aborted by the local system. Some additional environment details: Running on internal network web farm consisting of two servers running IIS7 on Windows Server 2008 OS. These problems did not occur when running in an older IIS6 web farm of three servers running on Windows Server 2003 (and we use a single IIS6/2003 instance for our development and staging environments with no issues). EDIT: Also, all of these server instances are VMWare virtual machines, not sure if that is a surprise anymore or not. The web service is a .Net 2.0/3.5 compiled .asmx web service that has its own application pool (.Net 2.0, integrated pipeline). Only has Windows Authentication enabled. We have another web service on the farm that uses the same physical path as the primary service, the only difference being that Basic Authentication is enabled. This is used for a portion of our ERP system. Have tried using the same and different application pool - no effect on the error. This site isn't hit as often as the primary site and has never had an error. As mentioned, the error will only happen when called from the .Net client - not from other applications. The client application is always creating a new web service object for each request and setting the service credentials to System.Net.CredentialCache.DefaultCredentials. The application is either deployed locally to a client or run in a Citrix server session. Those users running in Citrix doesn't seem to experience the issue, only locally deployed clients. The Citrix servers and the web farm are located in the same physical location and are located in the same IP range (10.67.xx.xx). Locally deployed clients experiencing the error are located elsewhere (10.105.xx.xx, 10.31.xx.xx). I've checked the OS logs to see if I can see any problems but nothing really sticks out. EDIT: Actually, I myself just ran into the error a little bit ago. I decided to check out the logs again and saw that there was a Security log entry of "Audit Failure" at the 'same' time (IIS log entry at 1:39:59, event log entry at 1:39:50). Not sure if this is a coincidence or not, I'll have to check out the logs of previous errors. I'm probably grasping for straws but the details: Log Name: Security Source: Microsoft-Windows-Security-Auditing Date: 7/8/2009 1:39:50 PM Event ID: 5159 Task Category: Filtering Platform Connection Level: Information Keywords: Audit Failure User: N/A Computer: is071019.<**.net Description: The Windows Filtering Platform has blocked a bind to a local port. Application Information: Process ID: 1260 Application Name: \device\harddiskvolume1\windows\system32\svchost.exe Network Information: Source Address: 0.0.0.0 Source Port: 54802 Protocol: 17 Filter Information: Filter Run-Time ID: 0 Layer Name: Resource Assignment Layer Run-Time ID: 36 I've also tried to use Failed Request Tracing in IIS7 but the service call never actually gets to where FRT can capture it (even though the failure is logged in the web service log). The network infrastructure group said they checked out the DNS and any NIC settings are correct so there is no 'flapping'. Everything pans out. I'm not sure that they checked out any domain controller servers though to see if that could be an issue. Any ideas? Or any other debugging strategies to get to the bottom of this? I'm just the developer in charge of the software and don't really have the knowledge on what to investigate from the networking side of things - although it does sound like a networking issue to me based on what is happening. Thanks in advance for any help.

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• Check_webinject plugin will not connect to https site using

  - by uSlackr

  We're using Nagios to monitor some of our web sites. We have a script that uses the older plugin that we are trying to switch to using webinject.pl from cpan. When the script runs, it generates this error: LWP::Protocol::https::Socket: SSL connect attempt failed with unknown error error:1407741A:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert decode error at /usr/local/share/perl5/LWP/Protocol/http.pm line 51. It appears the web site does not support TLSv1 for https. If it matters, the site is a Cisco WebVPN. I've pointed the same script at a different site that does support TLSv1 and it seems to work fine. My web search is coming up empty. Successful connect: <case id="1" description1="Metro Home Page" description2="Metro, login test" method="get" url="https://metro.myco.com/index.php" verifypositive="restricted" logrequest="yes" logresponse="yes" sleep="1" / Failing connect: <case id="2" description1="WebVPN Home Page" description2="webvpn.myco.com login test" method="get" url="https://webvpn.myco.com/webvpn.html" verifypositive="Authorized" logrequest="yes" logresponse="yes" sleep="1" /

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• Can a virus corrupt a hard disk?

  - by sundar

  Shorter version: Hard disk corrupt, vendor claims warranty does not apply since it was "due to a virus" and "problems due to software are not covered under the warranty". Longer version: My Dell laptop recently refused to boot, and all attempts to 'repair' the Vista installation using the provided installation CD failed. I called up Dell support, and a representative took the laptop and after a day said the hard disk is corrupt. When I tried to ask for a replacement under the warranty, an official replied that the corruption was due to a virus, and "problems due to software are not covered under the warranty". Now, I get a doubt that he's trying to avoid having to provide it under the warranty. Is it possible for a hard disk to get corrupt due to a virus? If yes, is there any way we can detect it was due to a virus (as he claims to have detected)?

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