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• Remote Linux system via Windows 7

  - by kaila

  I have a dual boot with Windows 7 and Fedora. Though I can long into both without any problems, I am trying to log in to the linux account via the Windows account. Is that possible? Or, is it possible to access my university's linux server via telnet from home? I did so and got an error, with cold not connect to port 23 message. Also, since most of my mail accounts are on Windows, the passwords to which I have forgotten, I would prefer working on a ;remote' connection.

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• How many site visitors can my server handle? [closed]

  - by coolboycsaba

  I have a website, and I want to host it on my own computer, but I'm wondering if it's good enough. The website checks if the user is logged in and then displays 15 items (title, description) from a mysql database and the rating (stored in another database) and the comments (another database) for each item. It also displays some stats (number of items, comments). I also have an image for each item. My specs are: AMD Athlon 64 X2 Dual Core Processor 5600+ 2.90 GHz RAM: 4.00GB Windows 7 64bit So what do you think, how much visitors and items could it handle (at once or daily) ? My internet connection is good, around 7-10 mb upload and same download speed

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• Windows update not working (2008 R2)

  - by Le_Quack

  long story short, one of our domain controllers is won't update. when an update is attempted it says the service is not running (checked and restarted yes it is) and event viewer says its error 0x80072ee2 but this apparently means there is a connection issue but as far as I can work out there isn't. this isn't a short term issue either seems to have been going on since at least feburary. any ideas? Note: Server updates fall to another (more senior) member of the team please do not ask me why they have been so neglected. He doesn't know what the issue is so I'm just trying to get to the bottom of this. many thanks

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• How to access network shares, printers, etc.through Windows 7 Built-In VPN?

  - by mbrion

  After I have successfully connected to a Windows 7 box via the built-in VPN: how do I access shares, shared printers, network appliances, etc.? So, call me bad at googling, but: I can find dozens of articles on "How to Set up a VPN Connection" and "How to connect to a VPN" for Windows 7... but I can't find a single article on how to access resources after connecting. I have a home VPN set up in Windows 7; I was able to connect to it from my friend's Windows 7 machine last night. I expected to be able to UNC into my shares; I also expected to be able to go to "Start Computer" and Click "Network" on the left side, and then see all of the devices on my home network (while the VPN was connected). Am I missing something obvious? How do I make this happen?

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• remoting to pc's already setup with pocketcloud

  - by KiloJKilo

  I use pocketcloud to remote desktop into my PCs on my home network. I would like to remote desktop with windows on my laptop via windows 7, but I'm not really sure how to, without breaking pocketcloud's connection. Does pocketcloud change my router's port forward to each machine as needed? Is there a way I can piggyback on the pocketcloud app? It appears to use 3389 but nothing is routed on that port in my router. Any ideas on how to accomplish this?

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• Multiple desktops in Windows

  - by John Straka

  I'm running a program that uses WatiN to automate file uploads to different websites. I currently run it on a machine that I remote into via the standard Remote Desktop Connection in Windows - once I start an upload, I go ahead and continue using my local machine. Soon, I'll be needing to run it locally. The problem is that it requires focus (which is unavoidable due to WatiN utilizing SendKeys) and I of course don't want to render my machine useless while it runs. So, my question: Is there any way to emulate the multiple desktops/workspaces that have been in many Linux distros for some time? I tried VirtuaWin to no avail. Alternatively, is there a way to remote into a machine from itself? Or is there some other means of creating a separate session on the same machine that does not steal focus? Running Linux is not an option, and a VM would be overkill.

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• Windows Server 2003 seems to pick the 'outgoing' IP address at random from all the ones configured in IIS, how can I make it just use one?

  - by ioSamurai

  We have multiple sites in IIS with different IP addresses. This is cool, want different IPs to all go to this server and use the proper site. However I discovered an issue that when the server makes an outgoing connection, I cannot predict which IP it will use. I had to have one client add ALL the IPs to their firewall so that a certain service could communicate with their server. Well now the time has come to add another IP/site to IIS but I had told them they would not need to add any more IPs. So the question is, how can I make Windows Server 2003 use only ONE specific IP for outgoing calls instead of it being unpredictable? If this is not a good enough description, when I was RDPed into the server and I opened IE and went to 'what is my IP' it was sometimes different which is how I discovered why the one client's firewall was suddenly refusing the connections. How can I just make outgoing calls originate from a static IP yet still allow multiple IPs pointing to different sites in IIS?

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• ssh login with multi-keys (several users) from the same workstation

  - by user1463152

  Basically, as it comes from the title, I'd like to login from my workstation to a SSH server by using different account in different shells. What I'd like to do is to backup all my account from this server to my hard drive by using rsync, but as you know rsync can get a connection if the keys have been generated. I have already an account set with key for login without pass. What I did was to generate a key on the server and then download it on my ~/.ssh folder. I tried it with another account and I chanced the name of the key. Then I download it in my ~/.ssh...but no way to get it work. I am not an expert of this stuff. If you would provide any tips or way to set it up I would really appreciate your help. Cheers

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• Will a `wireless n` network adapter work `wireless g` router?

  - by ShoeLace1291

  I have verizon fios internet service. I believe they use a Wireless G router, but I just have one question. I currently am using a 54mbps wireless pci adapter in my Windows 7 custom build. It drops the internet connection all the time and is starting to get very irritating. I'm thinking about buying a new one, but all the 300mbps cards on newegg are wireless n. So my question is, will a wireless n network adapter make a difference with a wireless g router?

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• Site faster on 1 core/1GB ram than on 8 core/32GB ram wth?

  - by xtra

  Both sites are US based. I'm located in Europe. http://198.105.209.13/ <==== site that loads tons faster on 1 core and 1gb ram ONLY (Cent OS VPS) http://108.61.35.219/ <== site is located on my dedicated server with i7-3770 cpu and 32 gb ram (Windows) and is slow as hell Even if faster site is on linux it shouldn't make such a big difference in page load seriously. Does anyone know what could be a hiccup on the dedicated server? It's just unbelievable to me that site loads faster on 1 core cpu than on dedicated server. Note that site is pretty much only thing running on dedicated server. It has 1gbps connection.

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• Can't connect to Wireless

  - by SimplyRed37

  Good day all! I hope you are doing good. I have performed a WUBI installation of 12.04 on my HP G62 laptop, which has an Atheros AR9285 wireless chipset. Everything works fine with my wired network connection. However, wireless is unable to connect to my wifi network. I enter the WPA2 key and then it attemps to connect, but eventually comes back, asking for the WPA2 key again, as if it was not good. All of the other laptops in the household are able to connect, using the same key (I configured them all, so I am 500% sure of the WPA2 key). Any idea as to what could be causing this? I can definitely post the output of CLI commands like "rfkill list" or "sudo lshw -class network", or "ifconfig". I have installed Ubuntu a few time but I am definitely still a newbie, but I am definitely computer savyy. Looking forward to suggestions . Thanks in advance !!! Dan...

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• Run SSH trough a proxy

  - by Row Minds

  I have a question. How can i run SSH trough a proxy or a SSH Tunneling Protocol? For example i have a computer(Ubuntu) with ip eg. 123.123.123.123 and i want to connect to my server trough a proxy eg. 111.111.111.111 so i can see in lastlog that the last authentication was made from 123.123.123.123 . I need this because i cannot access a certain server at work only with an specified range IP. What i tried so far was http://daniel.haxx.se/docs/sshproxy.html where i used ssh -D 1 [email protected] -p 443 where i had 127.0.0.1 forwarded to a SSH Tunneling Protocol http://www.nixtutor.com/linux/installing-and-configuring-an-ssh-server/ (i configurated listening on port 443 but no result, still no connection (denied) ...) This question may sound simple, but i can't figure it out, can you please help me? Thanks.

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• Parallelize code using CUDA [migrated]

  - by user878944

  If I have a code which takes struct variable as input and manipulate it's elements, how can I parallelize this using CUDA? void BackpropagateLayer(NET* Net, LAYER* Upper, LAYER* Lower) { INT i,j; REAL Out, Err; for (i=1; i<=Lower->Units; i++) { Out = Lower->Output[i]; Err = 0; for (j=1; j<=Upper->Units; j++) { Err += Upper->Weight[j][i] * Upper->Error[j]; } Lower->Error[i] = Net->Gain * Out * (1-Out) * Err; } } Where NET and LAYER are structs defined as: typedef struct { /* A LAYER OF A NET: */ INT Units; /* - number of units in this layer */ REAL* Output; /* - output of ith unit */ REAL* Error; /* - error term of ith unit */ REAL** Weight; /* - connection weights to ith unit */ REAL** WeightSave; /* - saved weights for stopped training */ REAL** dWeight; /* - last weight deltas for momentum */ } LAYER; typedef struct { /* A NET: */ LAYER** Layer; /* - layers of this net */ LAYER* InputLayer; /* - input layer */ LAYER* OutputLayer; /* - output layer */ REAL Alpha; /* - momentum factor */ REAL Eta; /* - learning rate */ REAL Gain; /* - gain of sigmoid function */ REAL Error; /* - total net error */ } NET; What I could think of is to first convert the 2d Weight into 1d. And then send it to kernel to take the product or just use the CUBLAS library. Any suggestions?

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• Server seems up, but accepts no connections whatsoever

  - by Rnatau

  Hi, I have a problem with a Debian based Server, unfortunately housed in a remote location. Two days ago, it was suddenly down and completely unreachable. After having someone reboot it, it worked for about a day, then seemed to be down again. This time, however, it was different: -The server reacts to pings -It is scannable, and all the relevant ports are open But: -Open shells were immediately blocked, and no warning had been shown -It's not possible to open any connection - the TCP/IP handshake seems to have some problems: SSH handshake As this is a private server of a small community, we don't have the resources to pay a technician to fix the problem for us, so any hints how to fix the problem after the next reboot would be highly appreciated... Thanks a lot!

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• What are my options for a secure External File Share in Server 2008 R2?

  - by Nitax

  Hi, I have a Windows Server 2008 R2 machine installed on a home network with a number of files that need to be shared in a few different scenarios. I would like for all three scenarios to have a solution with some sort of encyption to protect the data during transfer. Scenario 1: I need to access files from my laptop (Mac OSX) or another computer outside of the network. This option seems like the easy one to answer in that I could use LogMeIn, the windows VPN, etc. to create such a connection. Scenario 2: I need to provide access to another user with minimal installation / configuration on his or her end. This makes me think of the new FTP 7.5 provided with Server 2008 R2 but i'm not sure of the details: Does it support SSH or some other form of encryption?, can an OSX user connect?, etc. My question here is what are my options? I really just don't know where to get started...

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• Xubuntu 12.04: Slow Login

  - by naxchange

  I'm running Xubuntu 12.04, and after I ran the update, my login started slowing down big time. I've dabbled a little bit with the programs in Settings - Settings Manager - Session and Startup, and tried closing and opening these programs, and then rebooting. Anyways, I narrowed it down to a combination of 2 processes, "Network" (the connection manager) and "Xfce Volume Daemon". Their corresponding terminal commands are: ~$ nm-applet ~$ xfce4-volumed If I disable them, and then run them after login is complete, everything works just fine. Is there a way for me to run these commands automatically at start up? I want to maybe write a shell script and save it somewhere, or at least edit the order things happen after login, so the desktop can load before these processes. Hope I've been clear enough, and thanks in advance! NAX

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• Sync laptop and desktop solution/ideas?

  - by user1078719

  I have a laptop and a desktop I want to keep files up-to-date on both of them. I was thinking of creating a hard drive on 'server' and then changing "my documents" to that server path. It should work all right when there are two computers but what if a laptop uses wireless access at my house and more importantly, when it's connected wirelessly on a different IP range when I'm at college? For the second case, I guess, creating a VPN/remote server connection to the desktop will work, but if I want to make it automatic (my documents mapping), is there way to do that?

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• SQL Server 2008 (64-bit)

  - by Grace09

  I have transaction log backup failures randomly. SQL Server Log says 'Memory constraints resulted reduced backup/restore buffer sizes. Proceding with 6 buffers of size 64KB.', and the SQL Server Agent Error Log has quite a few errors like 'Unable to start Job Manager thread for job xxx', '[298] SQLServer Error: 768, Client unable to establish connection [SQLSTATE 08001]', [298] SQLServer Error: 768, SSL Provider: Not enough memory is available to complete this request [SQLSTATE 08001]'. I am really low on the memory? It has total of 32 GB, but I set maximum to 20. Task manager shows it is using 99% of physical memory. Memoryclerk-sqlbufferpool has 32GB for the Virtual Memory Reserved, and 20 GB for the Virtual Memory Committed. From the perfmon, SQLServer:Memory Manager/Total ServerMemory shows 21GB of memory in use, that's what I set the maximum to. I don't where the rest of memory go. Can anyone advice? Thanks in advance.

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• What are the reasons why outlook looses configurations?

  - by jnroche

  Can't seem to establish any logic why outlook suddenly looses its profile coniguration settings intermittently. I work for an IT Contact Centre but it hurts when someone asks me why they loose their outlook profiles suddenly, and some most of the time. I know there are lots of reasons but I'm not sure which ones are the best. Could it be that the PC in a hurge corporate organization will not be connected to the network properly so the profile gets corrupted for outlook? But they don't usually shut down the PC after office hours due to the fact that its a 24 hours operations. On top of that, when users are migrated to Windows 7 / Office 2010 and then logs on to this pc, then opens outlook, then logs off then goes back to a Windows XP PC and opens outlook 2003 the profile is again lost. Again why is this? Is there anyone out there whose facing same connection/outlook profile issues getting lost for no apparent reason?

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• Playbook is starting to get mail all of a sudden [closed]

  - by 1.21 gigawatts

  After 6 months my Playbook is just now this morning starting to pull in emails from my GMail account. Why? I didn't change anything on my end. The only difference I can think of (besides something changing on RIMs services end if that has any part in this) may be that I've been on a secure university connection for a few hours. I've been on this network before but the playbook doesn't seem to stay connected to it very long. Maybe it's because I have a lot of emails in my account? Has anyone else noticed this?

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• Unable to use strong encryption

  - by user224299

  So I am exploring Apache to create a simple example: the default page and a directory "secure". I everyone to be able to access the server but, when one wants to access the "secure" directory, I the connection to use strong encryption. I am using apache2.4. However this is not working and I don't know why! I have done just like in the Apache tutorial: LoadModule ssl_module /usr/lib/apache2/modules/mod_ssl.so <VirtualHost *:443> SSLEngine on SSLCertificateFile /home/vitorpereira/Desktop/cert.cer SSLCertificateKeyFile /home/vitorpereira/Desktop/key.key </VirtualHost> SSLCipherSuite ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL <Location /var/www/html/secure> SSLCipherSuite HIGH:!aNULL:!MD5 </Location> But this does not work :/ And, I can access the secure folder with http but when I write https, it says not found!

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• Curl, twitter oauth problem

  - by Darxval

  Does anyone see a problem with the following Curl call / how the Oauth request is built? (i am trying to get a correctly setup request so i can finish my app) So i am calling the following CURL call: C:\>curl -v -k --data-urlencode "status=Testing2" -H "Authorization: OAuth realm='', oauth_nonce=1276107867blah, oauth_timestamp=1276107867, oauth_consumer_key=yJDLH7BDdVi1OKIINSV7Q, oauth_signature_method=HMAC-SHA1, oauth_version=1.0, oauth_signature=NWU4MDdlNjk0OGIxYWQ1YTkyNmU5YjU1NGYyOTczMmU5ZDg5 YWNkNA==, staus=Testing2 " http://twitter.com/statuses/update.xml?status=Testing2 and i recieve this: * About to connect() to twitter.com port 80 (#0) * Trying 168.143.162.68... connected * Connected to twitter.com (168.143.162.68) port 80 (#0) > POST /statuses/update.xml?status=Testing2 HTTP/1.1 > User-Agent: curl/7.20.1 (i386-pc-win32) libcurl/7.20.1 OpenSSL/0.9.8n zlib/1.2.5 libidn/1.18 libssh2/1.2.5 > Host: twitter.com > Accept: */* > Authorization: OAuth realm='', oauth_nonce=1276106370blah, oauth_timestamp=1276106370, oauth_consumer_key=yJDLH7BDdVi1OKIINSV7Q, oauth_signature_method=HMAC-SHA1, oauth_version=1.0, oauth_signature=MjQzNDA1MGU4NGRmMWVjMzUwZmQ4YzE5NzMzY2I1ZDJlOTRkNmQ2Zg==, staus=Testing2 > Content-Length: 15 > Content-Type: application/x-www-form-urlencoded > < HTTP/1.1 401 Unauthorized < Date: Wed, 09 Jun 2010 18:00:22 GMT < Server: hi < Status: 401 Unauthorized < WWW-Authenticate: Basic realm="Twitter API" < X-Runtime: 0.00548 < Content-Type: application/xml; charset=utf-8 < Content-Length: 164 < Cache-Control: no-cache, max-age=1800 < Set-Cookie: k=209.234.229.21.1276106420885412; path=/; expires=Wed, 16-Jun-10 18:00:20 GMT; domain=.twitter.com < Set-Cookie: guest_id=127610642214871948; path=/; expires=Fri, 09 Jul 2010 18:00:22 GMT < Set-Cookie: _twitter_sess=BAh7CDoPY3JlYXRlZF9hdGwrCIm33h0pAToHaWQiJTkyMjllODE0NTdiYWE1%250AMWU1MzBmNjgwMTFiMDhkYjdlIgpmbGFzaElDOidBY3Rpb25Db250cm9sbGVy%250AOjpGbGFzaDo6Rmxhc2hIYXNoewAGOgpAdXNlZHsA--8ebb3c62d461d28f8fda7b8adab642af66969f7e; domain=.twitter.com; path=/ < Expires: Wed, 09 Jun 2010 18:30:20 GMT < Vary: Accept-Encoding < Connection: close < <?xml version="1.0" encoding="UTF-8"?> <hash> <request>/statuses/update.xml?status=Testing2</request> <error>Could not authenticate with OAuth.</error> </hash> * Closing connection #0 my Parameters are setup like so: var parameters = [encodeURIComponent("status="+status),encodeURIComponent("oauth_token="+ac_token),encodeURIComponent("oauth_consumer_key="+"yJDLH7BDdVi1OKIINSV7Q"),encodeURIComponent("oauth_nonce="+nonce,"oauth_signature_method=HMAC-SHA1"),encodeURIComponent("oauth_timestamp="+timestamp),encodeURIComponent("oauth_version=1.0")] var join = parameters.join("&"); var eparamjoin =encodeURIComponent(join); The key is like so: var key=con_secret+"&"+ac_secret; Signature base string is: var signaturebs = "POST&"+encodeURIComponent(url)+"&"+eparamjoin; giving this: POST&http%3A%2F%2Ftwitter.com%2Fstatuses%2Fupdate.xml&status%253DTesting2%26oauth_token%253D142715285-yi2ch324S3zfyKyJby6WDUZOhCsiQuKNUtc3nAGe%26oauth_consumer_key%253DyJDLH7BDdVi1OKIINSV7Q%26oauth_nonce%253D1276107867blah%26oauth_timestamp%253D1276107867%26oauth_version%253D1.0 and signature built like so: var hmac = Crypto.HMAC(Crypto.SHA1, signaturebs,key ); var signature=Base64.encode(hmac); making the signature: NWU4MDdlNjk0OGIxYWQ1YTkyNmU5YjU1NGYyOTczMmU5ZDg5YWNkNA== Any help would be appreciated thank you!

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• Google App Engine - Spring Security Issue (java.security.AccessControlException)

  - by Taylor L

  I'm currently getting the AccessControlException below when I deploy to app engine (I don't see it when I run in my local environment). I'm using GAE 1.3.1, Spring 3.0.1, and Spring Security 3.0.2. Any ideas how to get around this issue? It appears to be an issue with Spring Security trying to get the system class loader, but I'm not sure how to work around this. Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.filterChainProxy': Initialization of bean failed; nested exception is java.security.AccessControlException: access denied (java.lang.RuntimePermission getClassLoader): java.security.AccessControlException: access denied (java.lang.RuntimePermission getClassLoader) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:355) at java.security.AccessController.checkPermission(AccessController.java:567) at java.lang.SecurityManager.checkPermission(Unknown Source) at com.google.apphosting.runtime.security.CustomSecurityManager.checkPermission(CustomSecurityManager.java:45) at java.lang.ClassLoader.getSystemClassLoader(Unknown Source) at org.springframework.beans.BeanUtils.findEditorByConvention(BeanUtils.java:392) at org.springframework.beans.TypeConverterDelegate.findDefaultEditor(TypeConverterDelegate.java:360) at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:213) at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:104) at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:419) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:657) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:191) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:984) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:888) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:479) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450) at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:270) at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:125) at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedMap(BeanDefinitionValueResolver.java:382) at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:161) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1308) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1067) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:871) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:272) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:196) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:530) at org.mortbay.jetty.servlet.Context.startContext(Context.java:135) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:191) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:168) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:235) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5485) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5483) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:363) at com.google.net.rpc.impl.Server$2.run(Server.java:837) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:536) at com.google.net.rpc.impl.Server.startRpc(Server.java:792) at com.google.net.rpc.impl.Server.processRequest(Server.java:367) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:448) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java:474) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:774) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:205) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:101) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:394) at java.lang.Thread.run(Unknown Source)

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• Update UI in the main activity through handler in a thread (Android)

  - by Hrk

  Hello, I try to make several connection in a class and update the multiple progressbar in the main screen. But I've got the following error trying to use thread in android : Code: 05-06 13:13:11.092: ERROR/ConnectionManager(22854): ERROR:Can't create handler inside thread that has not called Looper.prepare() Here is a small part of my code in the main Activity public class Act_Main extends ListActivity { private ConnectionManager cm; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Set up the window layout requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); setContentView(R.layout.main); getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title); } public void startConnection() { //open DB connection db = new DBAdapter(getApplicationContext()); db.open(); cm = new ConnectionManager(handler, db); showDialog(DIALOG_PROGRESS_LOGIN); } @Override public void onStart() { super.onStart(); startConnection(); } protected Dialog onCreateDialog(int id) { switch (id) { case DIALOG_PROGRESS_LOGIN: progressDialog = new ProgressDialog(Act_Main.this); progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.setMessage("Connecting.\nPlease wait..."); progressThreadLogin = new ProgressThreadLogin(); progressThreadLogin.start(); return progressDialog; case DIALOG_PROGRESS_NETWORK: [b]progressDialog = new ProgressDialog(Act_Main.this);[/b] progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.setMessage("Loading entire network.\nPlease wait..."); progressThreadNetwork = new ProgressThreadNetwork(); progressThreadNetwork.start(); return progressDialog; default: return null; } } // Define the Handler that receives messages from the thread and update the progress final Handler handler = new Handler() { public void handleMessage(Message msg) { int total = msg.getData().getInt("total"); int step = msg.getData().getInt("step"); Log.d(TAG, "handleMessage:PROCESSBAR:"+total); progressDialog.setProgress(total); if (total >= 100) { switch (step) { case UPDATE_NETWORK: dismissDialog(DIALOG_PROGRESS_LOGIN); showDialog(DIALOG_PROGRESS_NETWORK); cm.getNetwork(); break; .... default: break; } } } }; private class ProgressThreadLogin extends Thread { ProgressThreadLogin() { } public void run() { cm.login(); } } private class ProgressThreadNetwork extends Thread { ProgressThreadNetwork() { } public void run() { cm.getNetwork(); } } } And my connectionManager class: public class ConnectionManager { public ConnectionManager(Handler handler, DBAdapter db) { this.handler = handler; this.db = db; } public void updateProgressBar(int step, int value) { if (value == 0) total = total+1; else total = value ; Message msg = handler.obtainMessage(); Bundle b = new Bundle(); b.putInt("total", total); b.putInt("step", step); msg.setData(b); handler.handleMessage(msg); } public void login() { //DO MY LOGIN TASK updateProgressBar(Act_Main.UPDATE_NETWORK, 100); } } The crash errors occurs on the first line of "case DIALOG_PROGRESS_NETWORK:". My first progressbar is hidden but the second one is not displayed. I think I've done somthing wrong using the threads and handlers but I dont' know why. I was first using handler.sendMessage in place of handler.handleMessage but when I had several task in my connectionManager, the progressbar was updated only at the end of all tasks. Thank you in advance for your help

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• Fixing predicated NSFetchedResultsController/NSFetchRequest performance with SQLite backend?

  - by Jaanus

  I have a series of NSFetchedResultsControllers powering some table views, and their performance on device was abysmal, on the order of seconds. Since it all runs on main thread, it's blocking my app at startup, which is not great. I investigated and turns out the predicate is the problem: NSPredicate *somePredicate = [NSPredicate predicateWithFormat:@"ANY somethings == %@", something]; [fetchRequest setPredicate:somePredicate]; I.e the fetch entity, call it "things", has a many-to-many relation with entity "something". This predicate is a filter that limits the results to only things that have a relation with a particular "something". When I removed the predicate for testing, fetch time (the initial performFetch: call) dropped (for some extreme cases) from 4 seconds to around 100ms or less, which is acceptable. I am troubled by this, though, as it negates a lot of the benefit I was hoping to gain with Core Data and NSFRC, which otherwise seems like a powerful tool. So, my question is, how can I optimize this performance? Am I using the predicate wrong? Should I modify the model/schema somehow? And what other ways there are to fix this? Is this kind of degraded performance to be expected? (There are on the order of hundreds of <1KB objects.) EDIT WITH DETAILS: Here's the code: [fetchRequest setFetchLimit:200]; NSLog(@"before fetch"); BOOL success = [frc performFetch:&error]; if (!success) { NSLog(@"Fetch request error: %@", error); } NSLog(@"after fetch"); Updated logs (previously, I had some application inefficiencies degrading the performance here. These are the updated logs that should be as close to optimal as you can get under my current environment): 2010-02-05 12:45:22.138 Special Ppl[429:207] before fetch 2010-02-05 12:45:22.144 Special Ppl[429:207] CoreData: sql: SELECT DISTINCT 0, t0.Z_PK, t0.Z_OPT, <model fields> FROM ZTHING t0 LEFT OUTER JOIN Z_1THINGS t1 ON t0.Z_PK = t1.Z_2THINGS WHERE t1.Z_1SOMETHINGS = ? ORDER BY t0.ZID DESC LIMIT 200 2010-02-05 12:45:22.663 Special Ppl[429:207] CoreData: annotation: sql connection fetch time: 0.5094s 2010-02-05 12:45:22.668 Special Ppl[429:207] CoreData: annotation: total fetch execution time: 0.5240s for 198 rows. 2010-02-05 12:45:22.706 Special Ppl[429:207] after fetch If I do the same fetch without predicate (by commenting out the two lines in the beginning of the question): 2010-02-05 12:44:10.398 Special Ppl[414:207] before fetch 2010-02-05 12:44:10.405 Special Ppl[414:207] CoreData: sql: SELECT 0, t0.Z_PK, t0.Z_OPT, <model fields> FROM ZTHING t0 ORDER BY t0.ZID DESC LIMIT 200 2010-02-05 12:44:10.426 Special Ppl[414:207] CoreData: annotation: sql connection fetch time: 0.0125s 2010-02-05 12:44:10.431 Special Ppl[414:207] CoreData: annotation: total fetch execution time: 0.0262s for 200 rows. 2010-02-05 12:44:10.457 Special Ppl[414:207] after fetch 20-fold difference in times. 500ms is not that great, and there does not seem to be a way to do it in background thread or otherwise optimize that I can think of. (Apart from going to a binary store where this becomes a non-issue, so I might do that. Binary store performance is consistently ~100ms for the above 200-object predicated query.) (I nested another question here previously, which I now moved away).

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