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• NFS mount mounted inside another NFS mount disappears randomly

  - by espenfjo

  I have quite an odd issue where my nested NFS mounts just disappear randomly from time to time. The fstab entries look somewhat like this: nfs:/home /home/nfs rw,hard,intr,rsize=32768,noatime,nocto,proto=tcp 0 0 nfs:/bigdir /home/bigdir nfs rw,hard,intr,rsize=32768,noatime,nocto,proto=tcp,bg 0 0 The issue is that from time to time the "/home/bigdir" folder will be empty, even though mtab think that the share is still mounted. nfsstat et. al. do also think the share is still mounted. Only thing that works is by unmounting, and then (re)mounting the bigdir share. The server side is a NetApp. The client side is RHEL5.5, 2.6.18-194 kernel (Yes, I know 5.8 is out, but as far as I can see there are no erratas for this particular issue). I can use various hacks like automount, or mounting it to another path and then using --mount bind, but I would like to fix the underlying issue. -- Best regards Espen Fjellvær Olsen

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• Delta files not deleted

  - by DanieleF

  Dear al, I found out that my VM is running with a snapshot which is not visible in the snapshot manager. I found out also that the machine is running on a delta file (probably an old snaphot) I see there are procedures to consolidate snapshots but what i want to understand now is : Having a VMDK-flat disk of 50gb =which is actually the vdisk created at the beginning Now i have a DELTA file of 38 gb...and this file it is growing on daily basis. My question is : why the delta file is growing ? is that normal ? Please let me know what is behind.

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• How to parse pipe with multiple commands independently?

  - by yarun can

  How can I parse output of a single command by multiple commands without truncating at each step? For example ls -al|grep -i something will pass every line that has "something" in it to the next pipe which is fine, but that also means every other line in the pipe is discarded since there wont be matching the condition. What I want is to be able to operate on single pipe by many commands independently. In this case it a pipe from Mutt which passes the whole message body. I want to get grep, sed, delete and assign each of these to bash variables maybe. Initially what I want is to be able to assign "message id" to a variable, "subject" to another variable etc Then pass those into proper commands arguments. Here is how it will be MessageBodyFromMutt|grep something -Ax -Bx |grep another thing from the original message| sed some stuff from the original message| cut from here to there Obviously the above line does not do what I want. I want all these commands to operate on the original message body. I hope it makes sense

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• Linux - How to run Firefox with AT command

  - by conualfy

  I try to run a specified command on a desired time. I found at for this, and it seems to work fine if I run: echo "ls -al / > /home/florin/test.txt" | at 4:21am But I want to run a different thing: /usr/bin/firefox -new-tab http://google.ro I tried adapting the first line with my action (running it in terminal opens a new Firefox tab with http://google.ro, so the command is correct), but with at, it does not work: echo "firefox -new-tab http://google.ro" | at 4:23am The task seems to be scheduled, but it does not run. When running the previous line I get the default reply from at: warning: commands will be executed using /bin/sh Should my Firefox command be differently run in sh? Is there a way to do my action with at, or some other way? Thanks a lot!

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• Getting the general log to work in MySQL 5.6.8

  - by Benjamin

  I can't get the general log to work in this version of MySQL. I added the following lines to /usr/my.cnf: general_log = 1 general_log_file = "/var/log/mysql.log" Then restarted the server: [root@localhost ~]# service mysql restart Shutting down MySQL.. SUCCESS! Starting MySQL. SUCCESS! The settings seem to be taken into account: mysql> SHOW VARIABLES LIKE 'general_log%'; +------------------+--------------------+ | Variable_name | Value | +------------------+--------------------+ | general_log | ON | | general_log_file | /var/log/mysql.log | +------------------+--------------------+ 2 rows in set (0.01 sec) But the log is never created: [root@localhost ~]# mysqladmin flush-logs [root@localhost ~]# ls -al /var/log/mysql.log ls: cannot access /var/log/mysql.log: No such file or directory Any idea why?

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• LInux (Ubuntu Karmic) equivalent to Pawsense

  - by LRE

  I now work from a home office - much to the delight of my cats. One in particular likes to come for a hug several times a day. That in itself is fine but he tends to sit on my laptop keyboard whilst I'm working on my desktop and vice-versa. Also he'll walk across any keyboard I'm actually using at the time. I've found Pawsense and would like to know if anyone can suggest a Linux equivalent (or some incantations to achieve the same). Training him out of sitting on the keyboard is likely to prove fruitless (a suggested here). He's far more pig-headed than I am. This conversation discusses some utilities like xlock et al but I'd prefer if possible to have something more along the lines of Pawsense that doesn't lock the keyboard but "simply" intercepts cat-like typing. Thanks

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• IIS7 unchecked in windows component list yet when go to http://localhost still directs me to IIS7. How to get to Apache?

  - by Ed Hancock

  IIS7 was turned off on my Windows 7 system, Under control panel services and applications no web publishing appears. Have Apache, et. al. installed with Wampserver. Yet when I try to access the local server astill get directed to IIS7 welcome page. After turning off IIS7 restarted computer, no help, eliminated history, no help, deleted IIS7 folders, no help. It is hiding somewhere and I can not find it. Any suggestions/help would be appreciated. Ed

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• have list of emails to be deleted from sheet A col D [on hold]

  - by Peta

  Thank you for your comments guys & now that CharlieRB has suggested "Match entire cell contents" I'll give it a better go. No I do not expect people to do my work for me & I'm sorry if it came over that way - just didn't know where to start. Would love some help please, I've limited VBA & function knowledge & I'm not sure where to start. If someone can point me in the right direction it would be appreciated. I have a list of email addresses on sheet "B" col A (but I could put them on sheet A if it would make it easier / faster) that I want deleted from sheet "A" col D (may be 2 or more occurences of the same email). I can't just record a find & delete macro and edit because for example [email protected] will also pick up [email protected] which I may not want deleted. thanks very much Peta

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• What is the easiest way to do a direct file transfer of an extremely large file over the Internet?

  - by Kenneth Cochran

  I would like to transfer a 20+ GB file to a friend. I would like it to: Be fast Ensure data integrity Not require opening ports in either end's firewall Be free Not broadcast the file's existence to everyone on the Internet I've looked a several technologies and nothing seems to fit: Gnutella, BitTorrent, et al. satisfies 1, 2 and 4 JetBytes... 1, 3, 4 and 5 Yahoo Messenger, AIM, etc. 3, 4 and 5 FTP, SFTP... 1?, 4 and 5 rsync... 1, 2, 4 and 5 For a file this size speed and data integrity are the most important. No one wants a 20 GB file to fail a MD5 check after spending two days downloading it. Is there anything that meets all these requirements?

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• Choosing a home network layout

  - by James M.

  I have a server, 4 PC's, a network printer, a switch and an ADSL modem. Currently the server runs Red Hat 9 and sits between the internet and the other PCs like in http://upload.wikimedia.org/wikipedia/en/1/12/Sample-network-diagram.png I have bought a new server PC to replace the old one, and I plan to install Fedora Core linux on it. The server acts as web and file server. The PCs all run Windows. Alternatively, I could connect the new server and all PCs to the switch, and connect the switch to the modem. (Sorry, couldn't find an image.) What are the pros and cons of these network layouts? Eg. in terms of reliability, security and flexibility? I am not a Linux guru but know of (and am not afraid of) iptables, dhcpd et al. Thank you for any tips, pointers and links.

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• MySQL dump, output each table row on a new line whilst using --extended-insert

  - by soopadoubled

  I'm having an issue, where for ease of use, I'd like to be able to format a command line MySQL dump so that each row of a given table is on a new line when using the --extended-insert option. Usually when using --extended-insert, every row of a given table is outputted on one line, and as far as I am aware there's no way to change this, other than post-processing the dump with perl or such like. The format I'm looking for is: -- -- Dumping data for table `ww_tbCountry` -- INSERT INTO `ww_tbCountry` (`iCountryId_PK`, `vCountryName`, `vShortName`, `iSortFlag`, `fTax`, `vCountryCode`, `vSageTaxCode`) VALUES (22, 'Albania', 'AL', 1, 0.00, '8', 'T9'), (33, 'Austria', 'AT', 1, 15.00, '40', 'T9'), (40, 'Belarus', 'BY', 1, 0.00, '112', 'T9'), (41, 'Belgium', 'BE', 1, 15.00, '56', 'T9'), (51, 'Bulgaria', 'BG', 1, 15.00, '100', 'T9' However, when I dump a database using Phpmyadmin, using --extended-insert, each row is dumped on a new line (as shown by the example above). I've gone through Phpmyadmin and can't find any documentation that would explain this. Is anyone able to shed any light on this? Thanks in advance, Ian

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• Getting error in internet shortcut

  - by MJM

  I create a file by url extension and type following text into in(its url is sample): [Internet Shortcut] URL=http://en.wikipedia.org/wiki/WebDAV In some case i gettin this error:"The Target "" of this Internet Shortcut is not valid. Go to the internet shortcut property sheet and make sure the target is correct." (for sample if in path or name of target file exist space character) my default browser in Firefox. I want have a internet shortcut that open in all browser and on al os. What can I fixed it problem? (Sorry if I am using the wrong terminology or grammar, I am self taught english language)

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• Hardware for Capturing Packets

  - by Kevin

  One of my clients is a small school district in Texas. Like any school, they often have problems with network'd peripherals such as printers, et al. It would be nice to be able to simply "listen" to what the printer and PC are saying to each other (or not saying more importantly)... The problem is that I can't find old-style "hubs" anymore, and even if I could, it's not a long-term solution. All of the devices that I have found to replicate the purpose of a simple hub are either $100+ or are difficult to throw into a networking tool kit (aka my backpack)... Now that hubs are dead, what's the new low-cost standard for simple packet capture in the networking world?

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• What is Paging in memory management?

  - by Fasih Khatib

  I was just reading Operating System Principles by Silberschatz et al when I came across paging in memory management.I'm slightly confused about it. It states that Physical Memory(I assume it's RAM) is divided into frames, and logical memory is divided into pages. CPU generates logical addresses containing page number and an offset. This page number is used to retrieve the frame number from a page table which gives the base address so the physical address is calculated as base+offset. My question is: is the page table maintained for every process? I logically think that the answer would be yes as every process will need to map its own pages to frames. I may be wrong. Please clarify. Also: paging and segmentation(where 'holes' are created in memory) are two totally different techniques that are not used in combination. Correct?

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• How can I redirect HTTPS(S) traffic to anothr gateway?

  - by PsyStyle

  I have a network like 192.168.0.0/15 with the default gateway set to 192.168.0.1. Al the workstations of the network use this gateway for all kind of accesses to the Internet. Now I am testing a new Internet connection with another provider and for this I am using a second gateway on the same subnet with 192.168.0.2 as IP address. I want to redirect only HTTP and HTTPS traffic to this second gateway without touching the address of the default gateway set inside every workstation. How can I accomplish this task? What I have to change inside the first's gateway firewall configuration or routes? I tried with a dnat like DNAT loc:192.168.0.1 loc:192.168.0.2 tcp 80 but nothing worked. I use Shorewall for simplicity in configuration but I can understand even theorical answers which I will try to adapt to my case

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• Couchdb failing test suite on Linux

  - by user52674

  Hi I've been trying to install CouchDB on my webfusion virtual server. I followed the latest instructions from the webfusion forum (see: http://forum.webfaction.com/viewtopic.php?id=2355 ) and it runs (just) Futon is very sluggish and I get 502 errors. Anyway when I run the test suite it fails on multiple tests. Webfaction support have been great but don't have erlang experience to interpret the error logs. Can anyone help me know what might be wrong? Test suite result: basics, all_docs, attachments, attachments_multipart, attachment_names, compact, config, conflicts, delayed_commits, design_docs, design_options all the errors are: Exception raised: {"error":"unknown","reason":"\u000d\u000a502 Bad Gateway\u000d\u000a\u000d\u000a<\h1502 Bad Gateway\u000d\u000a nginx\u000d\u000a\u000d\u000a\u000d\u000a"} except for 'compact; which also has: Assertion failed: xhr.responseText == "This is a base64 encoded text" Assertion failed: xhr.getResponseHeader("Content-Type") == "text/plain" I'm stumped. Anybody know what these indicate? AL

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• How to get Apache to follow symlink instead of downloading it?

  - by user792445

  I am just using the standard apache config file which mentions that it follows symlinks, but when I hit the url http://localhost/test it downloads the symlink file instead of following it. What config do I need to change to get apache to follow the symlink instead of downloading it? This is an ls on the directory: $ ls -al total 10 drwx------+ 1 SYSTEM SYSTEM 0 Oct 20 10:55 . drwx------+ 1 SYSTEM SYSTEM 0 Aug 26 12:27 .. -rw-r--r--+ 1 me None 47 Oct 20 10:14 index.html lrwxrwxrwx 1 me None 29 Oct 19 17:10 test -> /home/me/projects/test This is in my apache config file: <Directory "D:/Program Files (x86)/Apache Software Foundation/Apache2.2/htdocs"> Options Indexes FollowSymLinks AllowOverride None Order allow,deny Allow from all </Directory>

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• Cannot install Java 7 update 9 32-bit on Win 7 64

  - by J. Parrino

  As there were several versons of Java on my laptop, I decided to uninstall them all and reinstall only the current version. I uninstalled all 64-bit and 32-bit versions using Revo Uninstaller. After dowloading the current versions, when attempting to install them, I get a message that both the 64-bit and 32-bit versions cannot be installed as they are already installed. Both the Windows 7 Programs and Features and Revo show no Java installed at al. I then tried the Microsoft Fixit for install and uninstall issues (KB 2438651). I was then able to install the 64-bit version, but continued to have the issue with the 32-bit version. I ran CCleaner, Glary Utilities and Auslogics Registry Cleaner, and noticed Java keys that were to be uninstalled. After cleaning the registry, I attemped to install the 32-bit version of Java once more, to no avail. Any suggestions on how to rectify this problem? Thank you for any guidance you can provide.

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• Shrink NTFS Partition Windows 2003

  - by Coops

  We have an iSCSI target provided by a CentOS server attached to a Windows Server 2003 Standard box, formatted in NTFS. My question is this - I know we can resize the backend block device fine (LVM et al.), however how do you tell Windows the NTFS filesystem has shrunk afterwards? [note we want to shrink]. I'm imagining a world of pain if it's not done correctly! This is a production box, so ideally we'd like the process to keep the drive mounted and online during the process, but downtime can be scheduled if need be. 90% of what I've found on the subject so far basically involves using the 'ntfsresize' command in Linux to do the job -- but surely Windows can do this itself? Cheers!

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• Why don't the keyboard shortcuts (e.g. hotkeys like Ctrl-C) work in a SharePoint rich-text field?

  - by zoagli

  I use SharePoint 2010 via Internet Explorer 8 on Windows XP. I have a standard input mask for a task consisting of text fields, rich-text fields et al. In text fields, I can use keyboard shortcuts (a.k.a. hotkeys) for editing (Ctrl-C/Ctrl-V) and formatting (Ctrl-B/Ctrl-I), but in the richtext field, none of them work. If I click on the appropriate button, however, the expected function is executed properly - but that is a tedious workaround. What could be the cause? Could it be that the Ctrl key is not recognized at all? (BTW: The problem is not reproducible in Firefox, because it doesn't show the rich-text controls at all. Why is another question.)

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• Paying great programmers more than average programmers

  - by Kelly French

  It's fairly well recognized that some programmers are up to 10 times more productive than others. Joel mentions this topic on his blog. There is a whole blog devoted to the idea of the "10x productive programmer". In years since the original study, the general finding that "There are order-of-magnitude differences among programmers" has been confirmed by many other studies of professional programmers (Curtis 1981, Mills 1983, DeMarco and Lister 1985, Curtis et al. 1986, Card 1987, Boehm and Papaccio 1988, Valett and McGarry 1989, Boehm et al 2000). Fred Brooks mentions the wide range in the quality of designers in his "No Silver Bullet" article, The differences are not minor--they are rather like the differences between Salieri and Mozart. Study after study shows that the very best designers produce structures that are faster, smaller, simpler, cleaner, and produced with less effort. The differences between the great and the average approach an order of magnitude. The study that Brooks cites is: H. Sackman, W.J. Erikson, and E.E. Grant, "Exploratory Experimental Studies Comparing Online and Offline Programming Performance," Communications of the ACM, Vol. 11, No. 1 (January 1968), pp. 3-11. The way programmers are paid by employers these days makes it almost impossible to pay the great programmers a large multiple of what the entry-level salary is. When the starting salary for a just-graduated entry-level programmer, we'll call him Asok (From Dilbert), is $40K, even if the top programmer, we'll call him Linus, makes $120K that is only a multiple of 3. I'd be willing to be that Linus does much more than 3 times what Asok does, so why wouldn't we expect him to get paid more as well? Here is a quote from Stroustrup: "The companies are complaining because they are hurting. They can't produce quality products as cheaply, as reliably, and as quickly as they would like. They correctly see a shortage of good developers as a part of the problem. What they generally don't see is that inserting a good developer into a culture designed to constrain semi-skilled programmers from doing harm is pointless because the rules/culture will constrain the new developer from doing anything significantly new and better." This leads to two questions. I'm excluding self-employed programmers and contractors. If you disagree that's fine but please include your rationale. It might be that the self-employed or contract programmers are where you find the top-10 earners, but please provide a explanation/story/rationale along with any anecdotes. [EDIT] I thought up some other areas in which talent/ability affects pay. Financial traders (commodities, stock, derivatives, etc.) designers (fashion, interior decorators, architects, etc.) professionals (doctor, lawyer, accountant, etc.) sales Questions: Why aren't the top 1% of programmers paid like A-list movie stars? What would the industry be like if we did pay the "Smart and gets things done" programmers 6, 8, or 10 times what an intern makes? [Footnote: I posted this question after submitting it to the Stackoverflow podcast. It was included in episode 77 and I've written more about it as a Codewright's Tale post 'Of Rockstars and Bricklayers'] Epilogue: It's probably unfair to exclude contractors and the self-employed. One aspect of the highest earners in other fields is that they are free-agents. The competition for their skills is what drives up their earning power. This means they can not be interchangeable or otherwise treated as a plug-and-play resource. I liked the example in one answer of a major league baseball team trying to field two first-basemen. Also, something that Joel mentioned in the Stackoverflow podcast (#77). There are natural dynamics to shrink any extreme performance/pay ranges between the highs and lows. One is the peer pressure of organizations to pay within a given range, another is the likelyhood that the high performer will realize their undercompensation and seek greener pastures.

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• Debugging Silverlight crash

  - by RHLopez

  I am trying to debug an IE 8 crash caused by a Silverlight application. I managed to find some articles on how to do a memory dump when a process crashes. I loaded the dump in windbg and ran !analyze -v. Below is the result. I am stuck at what further steps I can take to figure out what module or library that is running in Silverlight is causing the crash. So all I have right now is the crash in IE is caused by an Access violation (attempt to execute non-executable address) and from what is in the stack trace that some animation is running in Silverlight. Any tips or articles that would help me debug this will be appreciated. This dump file has an exception of interest stored in it. The stored exception information can be accessed via .ecxr. (1864.1560): Access violation - code c0000005 (first/second chance not available) eax=00000000 ebx=00000000 ecx=1b11fc58 edx=5c6f007d esi=00000000 edi=193b8e08 eip=00000000 esp=0f61f750 ebp=0f61f76c iopl=0 nv up ei pl nz na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010206 00000000 ?? ??? FAULTING_IP: +56b3952f04ebde68 748bc9f1 654c dec esp EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff) ExceptionAddress: 748bc9f1 ExceptionCode: c0000005 (Access violation) ExceptionFlags: 00000000 NumberParameters: 2 Parameter[0]: 00000008 Parameter[1]: 00000000 Attempt to execute non-executable address 00000000 PROCESS_NAME: iexplore.exe ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s. EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s. EXCEPTION_PARAMETER1: 00000008 EXCEPTION_PARAMETER2: 00000000 WRITE_ADDRESS: 00000000 FOLLOWUP_IP: agcore!CFrameworkElement::SetValue+1d7 5c704fa8 84c0 test al,al FAILED_INSTRUCTION_ADDRESS: +56b3952f04ebde68 748bc9f1 654c dec esp NTGLOBALFLAG: 0 APPLICATION_VERIFIER_FLAGS: 0 FAULTING_THREAD: 00001560 BUGCHECK_STR: APPLICATION_FAULT_SOFTWARE_NX_FAULT_NULL PRIMARY_PROBLEM_CLASS: SOFTWARE_NX_FAULT_NULL DEFAULT_BUCKET_ID: SOFTWARE_NX_FAULT_NULL LAST_CONTROL_TRANSFER: from 5c704fa8 to 00000000 STACK_TEXT: WARNING: Frame IP not in any known module. Following frames may be wrong. 0f61f74c 5c704fa8 1b17a134 193b8e08 0e690e14 0x0 0f61f76c 5c712360 0e690e14 1b17a134 0e690e14 agcore!CFrameworkElement::SetValue+0x1d7 0f61f788 5c7123a8 0e690e14 1b17a134 0e690e14 agcore!CShape::SetValue+0x72 0f61f7a0 5c70a6ff 0e690e14 1b17a134 00000000 agcore!CEllipse::SetValue+0x3b 0f61f7d0 5c752c2b 1b17a090 193b8e08 00000000 agcore!CAnimation::DoSetValue+0x50 0f61f810 5c7a7fb1 0f61f884 0f61f868 1b17a090 agcore!CAnimation::UpdateAnimationUsingKeyFrames+0x3b5 0f61f82c 5c707146 00000000 00000000 00000000 agcore!CAnimation::UpdateAnimation+0x184 0f61f87c 5c7071e5 3e4c8000 0f61f8cc 00000000 agcore!CTimeline::ComputeState+0x13a 0f61f89c 5c706d49 193f82b0 0f61f8cc 0f61f8d4 agcore!CTimelineGroup::ComputeState+0x8c 0f61f8ac 5c7069c7 3e4c8000 0f61f8cc 0b111f60 agcore!CStoryboard::ComputeState+0x48 0f61f8d4 5c706a29 0e6a0ca0 00000000 0e490070 agcore!CTimeManager::Tick+0x79 0f61f8e8 5c78f960 0b0e6d68 0f61f990 00000000 agcore!CCoreServices::Tick+0x21 0f61f940 5c706ac2 0b111f60 0e42ca08 ffffffff agcore!CCoreServices::Draw+0x140 0f61f964 67ac141c 0af99b90 00000000 0f61f990 agcore!CCoreServices::Draw+0x2d 0f61f9b4 67a933c2 0f61f9c8 00000000 00000000 npctrl!CXcpBrowserHost::OnTick+0x1b1 0f61f9e0 67a927c6 0064069c 00000402 00000000 npctrl!CXcpDispatcher::Tick+0xf3 0f61fa08 67a92709 0064069c 00000402 00000000 npctrl!CXcpDispatcher::OnReentrancyProtectedWindowMessage+0xcd 0f61fa28 764b6238 0064069c 00000402 00000000 npctrl!CXcpDispatcher::WindowProc+0xb8 0f61fa54 764b68ea 67a9269d 0064069c 00000402 user32!InternalCallWinProc+0x23 0f61facc 764b7d31 00000000 67a9269d 0064069c user32!UserCallWinProcCheckWow+0x109 0f61fb2c 764b7dfa 67a9269d 00000000 0f61fbb4 user32!DispatchMessageWorker+0x3bc 0f61fb3c 6fe504a6 0f61fb54 00000000 0ab11908 user32!DispatchMessageW+0xf 0f61fbb4 6fe60446 0af956a0 00000000 0b18a338 ieframe!CTabWindow::_TabWindowThreadProc+0x452 0f61fc6c 769d49bd 0ab11908 00000000 0f61fc88 ieframe!LCIETab_ThreadProc+0x2c1 0f61fc7c 76e53677 0b18a338 0f61fcc8 77829d72 iertutil!CIsoScope::RegisterThread+0xab 0f61fc88 77829d72 0b18a338 7dbc895d 00000000 kernel32!BaseThreadInitThunk+0xe 0f61fcc8 77829d45 769d49af 0b18a338 00000000 ntdll!__RtlUserThreadStart+0x70 0f61fce0 00000000 769d49af 0b18a338 00000000 ntdll!_RtlUserThreadStart+0x1b SYMBOL_STACK_INDEX: 1 SYMBOL_NAME: agcore!CFrameworkElement::SetValue+1d7 FOLLOWUP_NAME: MachineOwner MODULE_NAME: agcore IMAGE_NAME: agcore.dll DEBUG_FLR_IMAGE_TIMESTAMP: 4a67e422 STACK_COMMAND: ~44s; .ecxr ; kb FAILURE_BUCKET_ID: SOFTWARE_NX_FAULT_NULL_c0000005_agcore.dll!CFrameworkElement::SetValue BUCKET_ID: APPLICATION_FAULT_SOFTWARE_NX_FAULT_NULL_BAD_IP_agcore!CFrameworkElement::SetValue+1d7

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• Programatically add UserControl with events

  - by schaermu

  Hi everybody I need to add multiple user controls to a panel for further editing of the contained data. My user control contains some panels, dropdown lists and input elements, which are populated in the user control's Page_Load event. protected void Page_Load(object sender, EventArgs e) { // populate comparer ddl from enum string[] enumNames = Enum.GetNames(typeof (SearchComparision)); var al = new ArrayList(); for (int i = 0; i < enumNames.Length; i++) al.Add(new {Value = i, Name = enumNames[i]}); scOperatorSelection.DataValueField = "Value"; scOperatorSelection.DataTextField = "Name"; ... The data to be displayed is added to the user control as a Field, defined above Page_Load. The signature of the events is the following: public delegate void ControlStateChanged(object sender, SearchCriteriaEventArgs eventArgs); public event ControlStateChanged ItemUpdated; public event ControlStateChanged ItemRemoved; public event ControlStateChanged ItemAdded; The update button on the user control triggers the following method: protected void UpdateCriteria(object sender, EventArgs e) { var searchCritCtl = (SearchCriteria) sender; var scEArgs = new SearchCriteriaEventArgs { TargetCriteria = searchCritCtl.CurrentCriteria.CriteriaId, SearchComparision = ParseCurrentComparer(searchCritCtl.scOperatorSelection.SelectedValue), SearchField = searchCritCtl.scFieldSelection.SelectedValue, SearchValue = searchCritCtl.scFilterValue.Text, ClickTarget = SearchCriteriaClickTarget.Update }; if (ItemUpdated != null) ItemUpdated(this, scEArgs); } The rendering page fetches the data objects from a storage backend and displays it in it's Page_Load event. This is the point where it starts getting tricky: i connect to the custom events! int idIt = 0; foreach (var item in _currentSearch.Items) { SearchCriteria sc = (SearchCriteria)LoadControl("~/content/controls/SearchCriteria.ascx"); sc.ID = "scDispCtl_" + idIt; sc.ControlMode = SearchCriteriaMode.Display; sc.CurrentCriteria = item; sc.ItemUpdated += CriteriaUpdated; sc.ItemRemoved += CriteriaRemoved; pnlDisplayCrit.Controls.Add(sc); idIt++; } When first rendering the page, everything is displayed fine, i get all my data. When i trigger an update event, the user control event is fired correctly, but all fields and controls of the user control are NULL. After a bit of research, i had to come to the conclusion that the event is fired before the controls are initialized... Is there any way to prevent such behavior / to override the page lifecycle somehow? I cannot initialize the user controls in the page's Init-event, because i have to access the Session-Store (not initialized in Page_Init). Any advice is welcome... EDIT: Since we hold all criteria informations in the storage backend (including the count of criteria) and that store uses the userid from the session, we cannot use Page_Init... just for clarification EDIT #2: I managed to get past some of the problems. Since i'm now using simple types, im able to bind all the data declaratively (using a repeater with a simple ItemTemplate). It is bound to the control, they are rendered in correct fashion. On Postback, all the data is rebound to the user control, data is available in the OnDataBinding and OnLoad events, everything looks fine. But as soon it enters the real event (bound to the button control of the user control), all field values are lost somehow... Does anybody know, how the page lifecycle continues to process the request after Databinding/Loading ? I'm going crazy about this issue...

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• What is a good java data structure for storing nested items (like cities in states)?

  - by anotherAlan

  I'm just getting started in Java and am looking for advice on a good way to store nested sets of data. For example, I'm interested in storing city population data that can be accessed by looking up the city in a given state. (Note: eventually, other data will be stored with each city as well, this is just the first attempt at getting started.) The current approach I'm using is to have a StateList Object which contains a HashMap that stores State Objects via a string key (i.e. HashMap<String, State>). Each State Object contains its own HashMap of City Objects keyed off the city name (i.e. HashMap<String, City>). A cut down version of what I've come up with looks like this: // TestPopulation.java public class TestPopulation { public static void main(String [] args) { // build the stateList Object StateList sl = new StateList(); // get a test state State stateAl = sl.getState("AL"); // make sure it's there. if(stateAl != null) { // add a city stateAl.addCity("Abbeville"); // now grab the city City cityAbbevilleAl = stateAl.getCity("Abbeville"); cityAbbevilleAl.setPopulation(2987); System.out.print("The city has a pop of: "); System.out.println(Integer.toString(cityAbbevilleAl.getPopulation())); } // otherwise, print an error else { System.out.println("That was an invalid state"); } } } // StateList.java import java.util.*; public class StateList { // define hash map to hold the states private HashMap<String, State> theStates = new HashMap<String, State>(); // setup constructor that loads the states public StateList() { String[] stateCodes = {"AL","AK","AZ","AR","CA","CO"}; // etc... for (String s : stateCodes) { State newState = new State(s); theStates.put(s, newState); } } // define method for getting a state public State getState(String stateCode) { if(theStates.containsKey(stateCode)) { return theStates.get(stateCode); } else { return null; } } } // State.java import java.util.*; public class State { // Setup the state code String stateCode; // HashMap for cities HashMap<String, City> cities = new HashMap<String, City>(); // define the constructor public State(String newStateCode) { System.out.println("Creating State: " + newStateCode); stateCode = newStateCode; } // define the method for adding a city public void addCity(String newCityName) { City newCityObj = new City(newCityName); cities.put(newCityName, newCityObj); } // define the method for getting a city public City getCity(String cityName) { if(cities.containsKey(cityName)) { return cities.get(cityName); } else { return null; } } } // City.java public class City { // Define the instance vars String cityName; int cityPop; // setup the constructor public City(String newCityName) { cityName = newCityName; System.out.println("Created City: " + newCityName); } public void setPopulation(int newPop) { cityPop = newPop; } public int getPopulation() { return cityPop; } } This is working for me, but I'm wondering if there are gotchas that I haven't run into, or if there are alternate/better ways to do the same thing. (P.S. I know that I need to add some more error checking in, but right now, I'm focused on trying to figure out a good data structure.) (NOTE: Edited to change setPop() and getPop() to setPopulation() and getPopulation() respectively to avoid confucsion)

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• Múltiples clientes en el mismo Oracle UCM

  - by [email protected]

  Estamos muy activos con la implantación de plataformas ECM que den servicio a múltiples clientes. Consiguiendo 2 objetivos muy importantes:El cliente final puede pagar al proveedor por una plataformas ECM como servicio (SaaS). Y, lógicamente, se ahorra en complejidad y gastos de infraestructura, administración, formación, almacenamiento, etc...Hemos estado explicando estos días el modelo Master-Proxy de Oracle UCM con el que podemos implantar este tipo de plataformas. No siempre será la solución más adecuada porque a veces vamos a querer disponer de plataformas compartidas, pero con clientes completamente aislados. Siempre, la consola de migración nos permite exportar e importar componentes, metadatos, contenidos, workflows, etc... para que elijamos el modelo más adecuado para cada caso.Pero, ¿Cómo funciona?. Podéis ver en la imágen que se basa en la instalación de varias instancias de UCM y configurarlas de forma que varias de ellas se comporten como "Master" (digo varias para conseguir alta disponibilidad), y el resto se comporten como "Proxy" (también varias instancias de UCM pueden comportarse como un mismo "Proxy" permitiendo balancear la carga en función de que cada cliente requiera más o menos rendimiento). Esta configuración (que vemos en la imágen adjunta), nos permite:Delegar la gestión de usuarios de cada cliente. Los usuarios del Master podrán acceder a todos los Proxies, pero los usuarios de cada proxy sólo acceden a su repositorio.Delegar funcionalidad y componentes. Es posible configurar diferentes funcionalidades en cada proxy de forma que algunos servidores estén especializados en Web Content Management, otros en Document Management (por ejemplo).Diferentes modelos de metadatos. Podemos modelar unos tipos documentales generales para toda la plataforma y otros particulares diferentes en cada UCM "Proxy".Conseguir una centralización de búsquedas y acceso a repositorios de documentación con diferentes juegos de caracteres. Un UCM Master puede centralizar la búsqueda en UCM's proxy que alberguen documentación en diferentes juegos de caracteres (por ejemplo un UCM para documentación de idiomas "Western European" (inglés, español, francés, alemán,...) y otro UCM proxy bajo juego de caracteres "Asian" (japones, coreano, chino,...).Fuentes:Toda la información detallada se encuentra en la documentación de Oracle UCM, aquí:http://download.oracle.com/docs/cd/E10316_01/ouc.htmY en concreto, lo relativo a plataformas, en el documento "Planning and Implementation Guide", aquí:plan_implement_guide_10en.pdf

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