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  • Weird entry for robots.txt on a Naked Domain in Google Webmaster Tools

    - by Metalshark
    We own a .co.uk address and use an Internet hosting company that has made mistakes around DNS in the past. Our main site is hosted on www. and their reluctance to allow editing of AAAA records on-line means our naked domain does not resolve. Currently when we attempt to reach the naked version there is no entry for the browser to go to and it displays an unreachable page (nslookup just says Name: name of domain with no further entries such as an IP or Canonical Name). We recently added the relevant TXT records to verify us to view both the www. version and the naked version of the domain in Google Webmaster Tools (in anticipation of the requests to our Internet host coming to fruition). Imagine our shock when double checking the Site configuration Crawler access and finding a (admittedly failing) robots.txt with a dynamically generated HTML page (full of crude pop-up JavaScript) with references to 3 of our most prominent competitors. What could cause this to happen? As we are in the UK I am assuming some DNS server is serving Google bad information. We are going to contact the Internet hosting company to fix our A and AAAA records once and for all, then check that they work in the US (using something like OpenDNS). Should we be doing more though, for instance informing Google (through Webmaster Tools) that we are now aware there is something currently wrong with our naked domain? UPDATE: We have fixed our A records (not AAAA) and that has resolved the issue. But if there are further actions we should take for effectively having a parking page hosted on our active visitor-heavy, SEO-rich domain that advertised our competitors to US visitors, what would they be?

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  • Ranking drop after using reverse proxy for blog subdirectory and robots.txt for old blog subdomain

    - by user40387
    We have a 3Dcart store and a WordPress blog hosted on a separate server. Originally, we had a CNAME set up to point the blog to http://blog.example.com/. However, in our attempt to boost link-based and traffic-based authority on the main site, we've opted to do a reverse proxy to http://www.example.com/blog/. It’s been about two months since we finished the reverse proxy migration. It appears that everything is technically working as intended, including some robots and sitemap changes; the new URLs are even generating some traffic, as indicated on Google Analytics. While Google has been indexing the new URL locations, they’re ranking very poorly, even for non-competitive, long-tail keywords. Meanwhile, the old subdomain URLs are still ranking mostly as well as they used to (even though they aren’t showing meta titles and descriptions due to being blocked by robots.txt). Our working theory is that Google has an old index of the subdomain URLs, and is considering the new URLs to be duplicate content, since it’s being told not to crawl the subdomain and therefore can’t see the rel canonicals we have in place. To resolve this, we’ve updated the subdomain’s robot.txt to no longer block crawling and indexing. Theoretically, seeing the canonical tag on the subdomain pages will resolve any perceived duplicate content issues. In the meantime, we were wondering if anyone would have any other ideas. We are very concerned that we’ll be losing valuable traffic, as we’re entering our on season at the moment.

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  • Rewrite for robots.txt and favicon.ico [closed]

    - by BHare
    I have setup some rules in which subdomains (my users) will default to where I have located the robots.txt, favicon.ico, and crossdomain.xml therefore if a user creates a site say testing.mywebsite.com and they don't make their own favicon.ico at testing.mywebsite.com/favicon.ico, then it will use the favicon.ico I have in /misc/favicon.ico This works perfect, but it doesn't work for the main website. If you attempt to go to mywebsite.com/favicon.ico it will check if "/" exists, in which it does. And then never redirects to /misc/favicon.ico How can I get it so both instances redirect to /misc/favicon.ico ? # Set all crossdomain (openpalace file) favorite icons and robots.txt doesnt exist on their # side, then redirect to site's just to have something to go on. RewriteCond %{REQUEST_URI} crossdomain.xml$ RewriteCond ^(.+)crossdomain.xml !-f RewriteRule ^(.*)$ /misc/crossdomain.xml [L] RewriteCond %{REQUEST_URI} favicon.ico$ RewriteCond ^(.+)favicon.ico !-f RewriteRule ^(.*)$ /misc/favicon.ico [L] RewriteCond %{REQUEST_URI} robots.txt$ RewriteCond ^(.+)robots.txt !-f RewriteRule ^(.*)$ /misc/robots.txt [L]

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  • Should I prevent search engines indexing tag/category pages?

    - by Macha
    On my site, I currently have no special rules for search engines. It is a blog, statically generated using a Python program. When I search for some of my articles on Google, there is usually a tag or category page included in the results. Sometimes it even ranks ahead of the article itself. Obviously, as these links aren't always going to have the article on them, this aren't the results I want people to click on. So, I'm thinking of setting noindex on these pages. Is there any possible downside to doing so? Is this possible to do via robots.txt, or do I have to add it to all the relevant templates? All I can find for robots.txt are ways to stop the search engine crawling those pages, which isn't what I want - while I don't want them indexed, it's still the only surefire way to find all my blog posts.

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  • Why google isn't updating my site title in search results? [closed]

    - by SharkTheDark
    Possible Duplicate: Google doesn't seem to update the description or title of my homepage I had my domain for few days before I uploaded site to it, and it had one title, and then when I uploaded content it should get new title, but with my misunderstanding of WordPress it had blocked robots.txt and keyword with no-index and no-follow. But I removed that like 7 days ago, and I see in reports that Google bot is crawling over my site, but my site title isn't updating, it still has old domain title when site wasn't there... My robots.txt has now: User-agent: * Allow: / I have clear title tag on every page. How long does it take to update? Do I need to check something else?

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  • Android - cant read TXT files from SDcard on real mashine?

    - by JustMe
    Hello! When I run the code bellow in the virtual android (1.5) it works well, TextSwitcher shows first 80 chars from each txt file from /sdcard/documents/ , but when I run it on my Samsung Galaxy i7500 (1.6) there are no contents in TextSwitcher, however in LogCat there are FileNames of txt files. My Code: public void getTxtFiles(){ //Scan /sdcard/documents and put .txt files in array File TxtFiles[] String path = Environment.getExternalStorageDirectory().toString()+"/documents/"; String files; File folder = new File(path); if(folder.exists()==false){if (!folder.mkdirs()) { Log.e("TAG", "Create dir in sdcard failed"); return; }} else{ File listOfFiles[] = folder.listFiles(); for (int i = 0; i < listOfFiles.length; i++) { if (listOfFiles[i].isFile()) { files = listOfFiles[i].getName(); if (files.endsWith(".txt") || files.endsWith(".TXT")) { if((files.length()-1)>i){resizeArray(TxtFiles, files.length()+10);} TxtFiles[i]=listOfFiles[i]; System.out.println(TxtFiles[i]); } } }} } private void updateCounter(int Pozicija) { if(Pozicija<0){Toast.makeText(getApplicationContext(), R.string.LastTxt, 5).show(); mCounter++;} else if(TxtFiles[mCounter]!=null){ TextToShow = getContents(TxtFiles[mCounter]); if(TextToShow.length()>80)TextToShow=TextToShow.substring(0, 80); mSwitcher.setText(TextToShow); System.out.println(Pozicija); } else mCounter--; } static public String getContents(File aFile) { //...checks on aFile are elided StringBuilder contents = new StringBuilder(); try { //use buffering, reading one line at a time //FileReader always assumes default encoding is OK! BufferedReader input = new BufferedReader(new FileReader(aFile)); try { String line = null; //not declared within while loop /* * readLine is a bit quirky : * it returns the content of a line MINUS the newline. * it returns null only for the END of the stream. * it returns an empty String if two newlines appear in a row. */ while (( line = input.readLine()) != null){ contents.append(line); contents.append(System.getProperty("line.separator")); } } finally { input.close(); } } catch (IOException ex){ ex.printStackTrace(); } return contents.toString(); } And I am able to write contents of those files though LogCat! Any ideas?

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  • How can I get SQL Server transactions to use record-level locks?

    - by Joe White
    We have an application that was originally written as a desktop app, lo these many years ago. It starts a transaction whenever you open an edit screen, and commits if you click OK, or rolls back if you click Cancel. This worked okay for a desktop app, but now we're trying to move to ADO.NET and SQL Server, and the long-running transactions are problematic. I found that we'll have a problem when multiple users are all trying to edit (different subsets of) the same table at the same time. In our old database, each user's transaction would acquire record-level locks to every record they modified during their transaction; since different users were editing different records, everyone gets their own locks and everything works. But in SQL Server, as soon as one user edits a record inside a transaction, SQL Server appears to get a lock on the entire table. When a second user tries to edit a different record in the same table, the second user's app simply locks up, because the SqlConnection blocks until the first user either commits or rolls back. I'm aware that long-running transactions are bad, and I know that the best solution would be to change these screens so that they no longer keep transactions open for a long time. But since that would mean some invasive and risky changes, I also want to research whether there's a way to get this code up and running as-is, just so I know what my options are. How can I get two different users' transactions in SQL Server to lock individual records instead of the entire table? Here's a quick-and-dirty console app that illustrates the issue. I've created a database called "test1", with one table called "Values" that just has ID (int) and Value (nvarchar) columns. If you run the app, it asks for an ID to modify, starts a transaction, modifies that record, and then leaves the transaction open until you press ENTER. I want to be able to start the program and tell it to update ID 1; let it get its transaction and modify the record; start a second copy of the program and tell it to update ID 2; have it able to update (and commit) while the first app's transaction is still open. Currently it freezes at step 4, until I go back to the first copy of the app and close it or press ENTER so it commits. The call to command.ExecuteNonQuery blocks until the first connection is closed. public static void Main() { Console.Write("ID to update: "); var id = int.Parse(Console.ReadLine()); Console.WriteLine("Starting transaction"); using (var scope = new TransactionScope()) using (var connection = new SqlConnection(@"Data Source=localhost\sqlexpress;Initial Catalog=test1;Integrated Security=True")) { connection.Open(); var command = connection.CreateCommand(); command.CommandText = "UPDATE [Values] SET Value = 'Value' WHERE ID = " + id; Console.WriteLine("Updating record"); command.ExecuteNonQuery(); Console.Write("Press ENTER to end transaction: "); Console.ReadLine(); scope.Complete(); } } Here are some things I've already tried, with no change in behavior: Changing the transaction isolation level to "read uncommitted" Specifying a "WITH (ROWLOCK)" on the UPDATE statement

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  • In Windows, a batch file with a recursive for loop and a file name including blanks

    - by uvts_cvs
    Hello, I have a folder tree, like this (it's only an example, it will be deeper in my real case): C:\test | +---folder1 | foo bar.txt | foobar.txt | +---folder2 | foo bar.txt | foobar.txt | \---folder3 foo bar.txt foobar.txt My files have one or more spaces in the name and I need to perform a command on them, so I am interested in foo bar.txt but not in foobar.txt. I tried (inside a batch file): for /r test %%f in (foo bar.txt) do if exist %%f echo %%f where the command is the simple echo. It does not work because the space is skipped and I get no output. This works but it is not what I need: for /r test %%f in (foobar.txt) do if exist %%f echo %%f It prints: C:\test\folder1\foobar.txt C:\test\folder2\foobar.txt C:\test\folder3\foobar.txt I tried using the quotation mark (") but it does not work: for /r test %%f in ("foo bar.txt") do if exist %%f echo %%f It does not work because the quotation mark is still included in the output: C:\test\folder1\"foo bar.txt" C:\test\folder2\"foo bar.txt" C:\test\folder3\"foo bar.txt"

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  • Do we need Record Level Locking when we already have Transaction for online ordering? (of concert ti

    - by Jian Lin
    For online ordering of concert seat or airline ticket, do we need Record Level Locking or is Transaction good enough? For concert ticket (say, seat Number 20B), or airline ticket (even with overbooking, the limit is 210, for example), I think the website cannot lock any record or begin transaction when showing the ticket purchase screen. But after the user clicks "Confirm Purchase", then the server should Begin a Transaction, Purchase Seat Number 20B, and try to Commit. If another user already bought Seat 20B in a previous transaction, then it is the "Commit" part that the current transaction will fail? So... we don't need Record Level Locking? Do Transactions always go serialized (one after another), so that's why we can know for sure there is no "race condition"? In what situation is Record Level Locking needed then?

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  • juju spends bootstrap-timeout with a final message it cannot find /var/lib/juju/nonce.txt

    - by user285199
    I build two VMware's machines. First one with MAAS, second one with a fresh installation from MAAS. Region controller was installed with Ubuntu 12.04 distribution, and upgraded (. Node computing was installed from MAAS with Quantal 12.10. Juju was installed and upgraded to 1.18 (from ppa:juju/stable repository). MAAS was upgraded from cloud-archive:tools repository. In debug mode, I got how Juju connects to node. Then I run the same instruction: ssh -o "StrictHostKeyChecking no" -o "PasswordAuthentication no" -i /home/lliurex/.juju/ssh/juju_id_rsa -i /home/lliurex/.ssh/id_rsa [email protected] /bin/bash It worked (with and without /bin/bash). When Juju spends all bootstrap-timeout tells it has not found /var/lib/juju/nonce.txt file. It's true, it doesn't exist. It doesn't mind if you put a timeout of 1800, 3600 or 72000, it always finishes the same.

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  • Robot.txt can get all soft404s fixed?

    - by olo
    I got many soft404 in Google webmaster Tools, and those webpages aren't existing any more. thus I am unable to insert <meta name="robots" content="noindex, nofollow"> into my pages, and I've been searching a while but didn't get some valuable clues. There are about 100 URLs are soft 404, to redirect them all one by one is a bit silly as it would cost too much time for me. If i just add those links into robot.txt like below User-agent: * Disallow: /mysite.asp Disallow: /mysite-more.html if this way will fix all soft404s solidly? or if there is a way to change all soft404 to hard404? Please give me some suggestions. Many thanks

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  • Do or can robots cause considerable performance issues?

    - by Anicho
    So the question in the title is exactly what I am trying to find out. My case is: At work we are in a discussion with team members who seem to think bots will cause us problems relating to performance when running on our services website. Out setup: Lets say I have site www.mysite.co.uk this is a shop window to our online services which sit on www.mysiteonline.co.uk. When people search in google for mysite they see mysiteonline.co.uk as well as mysite.co.uk. Cases against stopping bots crawling: We don't store gb's of data publicly available on the web Most friendly bots, if they were to cause issues would have done so already In our instance the bots can't crawl the site because it requires username & password Stopping bots with robot .txt causes an issue with seo (ref.1) If it was a malicious bot, it would ignore robot.txt or meta tags anyway Ref 1. If we were to block mysiteonline.co.uk from having robots crawl this will affect seo rankings and make it inconvenient for users who actively search for mysite to find mysiteonline. Which we can prove is the case for a good portion of our users.

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  • How to recover a website's lost robot.txt?

    - by Jessica
    I found my website in the Wayback Machine a few months ago, but today I've tried again and now it tells me it can't find robots.txt. My old webhost stopped paying for their servers back in August without any notice. I was going to do a backup the day it happened. Is there a way just to find the text? I have the old IP, images, but nothing else. None of the big search engines have caches anymore, and I already looked in the cache of three of my Macs with nothing to be found.

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  • what is the file: C:\nppdf32Log\debuglog.txt

    - by Jesse
    Hello Everyone After I updated to 12.04, a file named " C:\nppdf32Log\debuglog.txt" occurs in my home directory, the content of the file is as the follow: NPP_Initialize : called NPP_GetValue is called NPP_SetWindow : called for instance 920c0e28 Window from browser - 77594625 NPP_SetWindow : called for instance 920c0e28 Window from browser - 77594625 NPP_SetWindow : called for instance 920c0e28 Window from browser - 77594625 NPP_NewStream : called for instance 920c0e28, stream 913403b0, URL http://www.xxxxxx.com/attachments/soft/CDGM%20Optical%20Glass%20Catalog.pdf, stream size 36177984, seekable 1 NPP_Write : called for instance 920c0e28, stream 913403b0, offset = 0, length = 16384, streamlength = 36177984 Trying for window attributes Trying for query tree NPP_Write : called for instance 920c0e28, stream 913403b0, offset = 16384, length = 16384, streamlength = 36177984 Trying for window attributes Trying for query tree ...... It seems this file is related to FireFox,what's exactly the problem? many thanks for your help!

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  • Unable to record sound from web browser (firefox / chromium ) using recordmydesktop

    - by thamurath
    I have to do some screencast tutorials and i am using recordmydesktop with gtk frontend to do it. I need to record also the sound and here is where i have found the problem. It took me some time, but now I can record the sound from almost every application in my desktop ... almost. I need to capture some sound from a web application using java, but when i load the page nothing appears in the playback tab of pavucontrol. I think this is the problem, because if there is no sound stream i think the recordmydesktop program thinks there is no sound to record ... the funny thing is that I can ear the sound in my speakers! I have tried with Firefox and Chromium with no success. Although I have been able to record youtube videos without problem, so it seems that java is the key here. Any suggestion or idea? P.S.: I am using Ubuntu 11.10 with this configuration. ( if more information is needed please let me know) sight i cannot post images ... so I have an audigy2 sound card using Analog Stereo Output profile. I have also an "Internal Audio" device, but i have it with the "Off" profile. In recordmydesktop-Advanced-Sound: Device = default

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  • A record not resolving

    - by user1561108
    I have a hosted domain at siteground. On this domain & host I have a subdomain with a wordpress install. I wish to move this blog to another host (hostgator), while keeping the domain with siteground. To do this I created a hosting account at hostgator, got it's ip address and set the A record in siteground's cpanel accordingly: subdomain.example.com 14400 A (ip of hostgator account) Going by this online traceroute tool the records appear to have been updated (over 4 hours ago now) as it now resolves to a theplanet.com server location which hostgator use yet the subdomain is still not resolving from a web browser. The account at hostgator has been setup and is navigable via ip address/~accountname. What's going wrong here? I should add the relevant DNS record at hostgator side looks like this: subdomain.example.com 86400 IN SOA ns483.websitewelcome.com. subdomain.example.com 86400 IN NS ns1.siteground145.com. subdomain.example.com 86400 IN NS ns2.siteground145.com. subdomain.example.com 14400 IN A 74.54.176.3 I'm not sure if the hostgator record should be classed as the SOA record but I don't know enough about it to be sure. Is this the source of the problem?

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  • The case of the phantom ADF developer (and other yarns)

    - by Chris Muir
    A few years of ADF experience means I see common mistakes made by different developers, some I regularly make myself.  This post is designed to assist beginners to Oracle JDeveloper Application Development Framework (ADF) avoid a common ADF pitfall, the case of the phantom ADF developer [add Scooby-Doo music here]. ADF Business Components - triggers, default table values and instead of views. Oracle's JDeveloper tutorials help with the A-B-Cs of ADF development, typically built on the nice 'n safe demo schema provided by with the Oracle database such as the HR demo schema. However it's not too long until ADF beginners, having built up some confidence from learning with the tutorials and vanilla demo schemas, start building ADF Business Components based upon their own existing database schema objects.  This is where unexpected problems can sneak in. The crime Developers may encounter a surprising error at runtime when editing a record they just created or updated and committed to the database, based on their own existing tables, namely the error: JBO-25014: Another user has changed the row with primary key oracle.jbo.Key[x] ...where X is the primary key value of the row at hand.  In a production environment with multiple users this error may be legit, one of the other users has updated the row since you queried it.  Yet in a development environment this error is just plain confusing.  If developers are isolated in their own database, creating and editing records they know other users can't possibly be working with, or all the other developers have gone home for the day, how is this error possible? There are no other users?  It must be the phantom ADF developer! [insert dramatic music here] The following picture is what you'll see in the Business Component Browser, and you'll receive a similar error message via an ADF Faces page: A false conclusion What can possibly cause this issue if it isn't our phantom ADF developer?  Doesn't ADF BC implement record locking, locking database records when the row is modified in the ADF middle-tier by a user?  How can our phantom ADF developer even take out a lock if this is the case?  Maybe ADF has a bug, maybe ADF isn't implementing record locking at all?  Shouldn't we see the error "JBO-26030: Failed to lock the record, another user holds the lock" as we attempt to modify the record, why do we see JBO-25014? : Let's verify that ADF is in fact issuing the correct SQL LOCK-FOR-UPDATE statement to the database. First we need to verify ADF's locking strategy.  It is determined by the Application Module's jbo.locking.mode property.  The default (as of JDev 11.1.1.4.0 if memory serves me correct) and recommended value is optimistic, and the other valid value is pessimistic. Next we need a mechanism to check that ADF is issuing the LOCK statements to the database.  We could ask DBAs to monitor locks with OEM, but optimally we'd rather not involve overworked DBAs in this process, so instead we can use the ADF runtime setting –Djbo.debugoutput=console.  At runtime this options turns on instrumentation within the ADF BC layer, which among a lot of extra detail displayed in the log window, will show the actual SQL statement issued to the database, including the LOCK statement we're looking to confirm. Setting our locking mode to pessimistic, opening the Business Components Browser of a JSF page allowing us to edit a record, say the CHARGEABLE field within a BOOKINGS record where BOOKING_NO = 1206, upon editing the record see among others the following log entries: [421] Built select: 'SELECT BOOKING_NO, EVENT_NO, RESOURCE_CODE, CHARGEABLE, MADE_BY, QUANTITY, COST, STATUS, COMMENTS FROM BOOKINGS Bookings'[422] Executing LOCK...SELECT BOOKING_NO, EVENT_NO, RESOURCE_CODE, CHARGEABLE, MADE_BY, QUANTITY, COST, STATUS, COMMENTS FROM BOOKINGS Bookings WHERE BOOKING_NO=:1 FOR UPDATE NOWAIT[423] Where binding param 1: 1206  As can be seen on line 422, in fact a LOCK-FOR-UPDATE is indeed issued to the database.  Later when we commit the record we see: [441] OracleSQLBuilder: SAVEPOINT 'BO_SP'[442] OracleSQLBuilder Executing, Lock 1 DML on: BOOKINGS (Update)[443] UPDATE buf Bookings>#u SQLStmtBufLen: 210, actual=62[444] UPDATE BOOKINGS Bookings SET CHARGEABLE=:1 WHERE BOOKING_NO=:2[445] Update binding param 1: N[446] Where binding param 2: 1206[447] BookingsView1 notify COMMIT ... [448] _LOCAL_VIEW_USAGE_model_Bookings_ResourceTypesView1 notify COMMIT ... [449] EntityCache close prepared statement ....and as a result the changes are saved to the database, and the lock is released. Let's see what happens when we use the optimistic locking mode, this time to change the same BOOKINGS record CHARGEABLE column again.  As soon as we edit the record we see little activity in the logs, nothing to indicate any SQL statement, let alone a LOCK has been taken out on the row. However when we save our records by issuing a commit, the following is recorded in the logs: [509] OracleSQLBuilder: SAVEPOINT 'BO_SP'[510] OracleSQLBuilder Executing doEntitySelect on: BOOKINGS (true)[511] Built select: 'SELECT BOOKING_NO, EVENT_NO, RESOURCE_CODE, CHARGEABLE, MADE_BY, QUANTITY, COST, STATUS, COMMENTS FROM BOOKINGS Bookings'[512] Executing LOCK...SELECT BOOKING_NO, EVENT_NO, RESOURCE_CODE, CHARGEABLE, MADE_BY, QUANTITY, COST, STATUS, COMMENTS FROM BOOKINGS Bookings WHERE BOOKING_NO=:1 FOR UPDATE NOWAIT[513] Where binding param 1: 1205[514] OracleSQLBuilder Executing, Lock 2 DML on: BOOKINGS (Update)[515] UPDATE buf Bookings>#u SQLStmtBufLen: 210, actual=62[516] UPDATE BOOKINGS Bookings SET CHARGEABLE=:1 WHERE BOOKING_NO=:2[517] Update binding param 1: Y[518] Where binding param 2: 1205[519] BookingsView1 notify COMMIT ... [520] _LOCAL_VIEW_USAGE_model_Bookings_ResourceTypesView1 notify COMMIT ... [521] EntityCache close prepared statement Again even though we're seeing the midtier delay the LOCK statement until commit time, it is in fact occurring on line 412, and released as part of the commit issued on line 419.  Therefore with either optimistic or pessimistic locking a lock is indeed issued. Our conclusion at this point must be, unless there's the unlikely cause the LOCK statement is never really hitting the database, or the even less likely cause the database has a bug, then ADF does in fact take out a lock on the record before allowing the current user to update it.  So there's no way our phantom ADF developer could even modify the record if he tried without at least someone receiving a lock error. Hmm, we can only conclude the locking mode is a red herring and not the true cause of our problem.  Who is the phantom? At this point we'll need to conclude that the error message "JBO-25014: Another user has changed" is somehow legit, even though we don't understand yet what's causing it. This leads onto two further questions, how does ADF know another user has changed the row, and what's been changed anyway? To answer the first question, how does ADF know another user has changed the row, the Fusion Guide's section 4.10.11 How to Protect Against Losing Simultaneous Updated Data , that details the Entity Object Change-Indicator property, gives us the answer: At runtime the framework provides automatic "lost update" detection for entity objects to ensure that a user cannot unknowingly modify data that another user has updated and committed in the meantime. Typically, this check is performed by comparing the original values of each persistent entity attribute against the corresponding current column values in the database at the time the underlying row is locked. Before updating a row, the entity object verifies that the row to be updated is still consistent with the current state of the database.  The guide further suggests to make this solution more efficient: You can make the lost update detection more efficient by identifying any attributes of your entity whose values you know will be updated whenever the entity is modified. Typical candidates include a version number column or an updated date column in the row.....To detect whether the row has been modified since the user queried it in the most efficient way, select the Change Indicator option to compare only the change-indicator attribute values. We now know that ADF BC doesn't use the locking mechanism at all to protect the current user against updates, but rather it keeps a copy of the original record fetched, separate to the user changed version of the record, and it compares the original record against the one in the database when the lock is taken out.  If values don't match, be it the default compare-all-columns behaviour, or the more efficient Change Indicator mechanism, ADF BC will throw the JBO-25014 error. This leaves one last question.  Now we know the mechanism under which ADF identifies a changed row, what we don't know is what's changed and who changed it? The real culprit What's changed?  We know the record in the mid-tier has been changed by the user, however ADF doesn't use the changed record in the mid-tier to compare to the database record, but rather a copy of the original record before it was changed.  This leaves us to conclude the database record has changed, but how and by who? There are three potential causes: Database triggers The database trigger among other uses, can be configured to fire PLSQL code on a database table insert, update or delete.  In particular in an insert or update the trigger can override the value assigned to a particular column.  The trigger execution is actioned by the database on behalf of the user initiating the insert or update action. Why this causes the issue specific to our ADF use, is when we insert or update a record in the database via ADF, ADF keeps a copy of the record written to the database.  However the cached record is instantly out of date as the database triggers have modified the record that was actually written to the database.  Thus when we update the record we just inserted or updated for a second time to the database, ADF compares its original copy of the record to that in the database, and it detects the record has been changed – giving us JBO-25014. This is probably the most common cause of this problem. Default values A second reason this issue can occur is another database feature, default column values.  When creating a database table the schema designer can define default values for specific columns.  For example a CREATED_BY column could be set to SYSDATE, or a flag column to Y or N.  Default values are only used by the database when a user inserts a new record and the specific column is assigned NULL.  The database in this case will overwrite the column with the default value. As per the database trigger section, it then becomes apparent why ADF chokes on this feature, though it can only specifically occur in an insert-commit-update-commit scenario, not the update-commit-update-commit scenario. Instead of trigger views I must admit I haven't double checked this scenario but it seems plausible, that of the Oracle database's instead of trigger view (sometimes referred to as instead of views).  A view in the database is based on a query, and dependent on the queries complexity, may support insert, update and delete functionality to a limited degree.  In order to support fully insertable, updateable and deletable views, Oracle introduced the instead of view, that gives the view designer the ability to not only define the view query, but a set of programmatic PLSQL triggers where the developer can define their own logic for inserts, updates and deletes. While this provides the database programmer a very powerful feature, it can cause issues for our ADF application.  On inserting or updating a record in the instead of view, the record and it's data that goes in is not necessarily the data that comes out when ADF compares the records, as the view developer has the option to practically do anything with the incoming data, including throwing it away or pushing it to tables which aren't used by the view underlying query for fetching the data. Readers are at this point reminded that this article is specifically about how the JBO-25014 error occurs in the context of 1 developer on an isolated database.  The article is not considering how the error occurs in a production environment where there are multiple users who can cause this error in a legitimate fashion.  Assuming none of the above features are the cause of the problem, and optimistic locking is turned on (this error is not possible if pessimistic locking is the default mode *and* none of the previous causes are possible), JBO-25014 is quite feasible in a production ADF application if 2 users modify the same record. At this point under project timelines pressure, the obvious fix for developers is to drop both database triggers and default values from the underlying tables.  However we must be careful that these legacy constructs aren't used and assumed to be in place by other legacy systems.  Dropping the database triggers or default value that the existing Oracle Forms  applications assumes and requires to be in place could cause unexpected behaviour and bugs in the Forms application.  Proficient software engineers would recognize such a change may require a partial or full regression test of the existing legacy system, a potentially costly and timely exercise, not ideal. Solving the mystery once and for all Luckily ADF has built in functionality to deal with this issue, though it's not a surprise, as Oracle as the author of ADF also built the database, and are fully aware of the Oracle database's feature set.  At the Entity Object attribute level, the Refresh After Insert and Refresh After Update properties.  Simply selecting these instructs ADF BC after inserting or updating a record to the database, to expect the database to modify the said attributes, and read a copy of the changed attributes back into its cached mid-tier record.  Thus next time the developer modifies the current record, the comparison between the mid-tier record and the database record match, and JBO-25014: Another user has changed" is no longer an issue. [Post edit - as per the comment from Oracle's Steven Davelaar below, as he correctly points out the above solution will not work for instead-of-triggers views as it relies on SQL RETURNING clause which is incompatible with this type of view] Alternatively you can set the Change Indicator on one of the attributes.  This will work as long as the relating column for the attribute in the database itself isn't inadvertently updated.  In turn you're possibly just masking the issue rather than solving it, because if another developer turns the Change Indicator back on the original issue will return.

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  • Google-Bot fell in love with my 404-page

    - by 32bitfloat
    Every day my access-log looks kind of this: 66.249.78.140 - - [21/Oct/2013:14:37:00 +0200] "GET /robots.txt HTTP/1.1" 200 112 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.78.140 - - [21/Oct/2013:14:37:01 +0200] "GET /robots.txt HTTP/1.1" 200 112 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.78.140 - - [21/Oct/2013:14:37:01 +0200] "GET /vuqffxiyupdh.html HTTP/1.1" 404 1189 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" or this 66.249.78.140 - - [20/Oct/2013:09:25:29 +0200] "GET /robots.txt HTTP/1.1" 200 112 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.75.62 - - [20/Oct/2013:09:25:30 +0200] "GET /robots.txt HTTP/1.1" 200 112 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.78.140 - - [20/Oct/2013:09:25:30 +0200] "GET /zjtrtxnsh.html HTTP/1.1" 404 1186 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" The bot calls the robots.txt twice and after that tries to access a file (zjtrtxnsh.html, vuqffxiyupdh.html, ...) which cannot exist and must return a 404 error. The same procedure every day, just the unexisting html-filename changes. The content of my robots.txt: User-agent: * Disallow: /backend Sitemap: http://mysitesname.de/sitemap.xml The sitemap.xml is readable and valid, so there seems to be no reason why the bot should want to force a 404-error. How should I interpret this behaviour? Does it point to a mistake I've done or should I ignore it?

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  • how to add a REverse PTR Record on Amazon Route 53?

    - by Oscar Cabrero
    if i have the below ip 168.144.254.X and i would like to add a ptr record in amazon in the form of X.254.144.168.in-addr.arpa what should be in the name field and what should be in the value field i have a zone created with a name like mydomain.com which host the DNS records for my ip. amazon wont let me add a value of X.254.144.168.in-addr.arpa in the name field do i need to create a new zone for the ip in order to allow this?

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  • To disallow indexing the category and tag listings in a blog

    - by Mert Nuhoglu
    Mark Wilson says that category and tag listings in a blog should be disallowed in order to prevent duplicate content. I understand this. However, I want to put internal links on keywords in the blog posts to the tag and category pages in order for the readers to find more relevant content. I wonder whether putting those internal links to the category/tag pages which are disallowed in robots.txt is counted as useful from the perspective of SEO internal linking?

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  • Hiding a particulat page from search engines not to index

    - by user702325
    I have a page which i don't want search engines to index or crawl. I am not sure hat should i put in my robots.txt file to tell search engines not to crawl/index that page. The page it itself is getting generated dynamically and do not have a predefined template for it all i know about its URL which is pre-defined and will remain unchanged. I have this page say at www.mysite.com/my-nonindexable-page/ Please suggest what i should do to achieve this.I am using WordPress for my website

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