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  • USB packets - receive wrong data

    - by regorianer
    i have a little python script which shows me the packets of an enocean device and does some events depending on the packet type. unfortunately it doesn't work because i'm getting wrong packets. Parts of the python script (used pySerial): Blockquote ser = serial.Serial('/dev/ttyUSB1',57600,bytesize = serial.EIGHTBITS,timeout = 1, parity = serial.PARITY_NONE , rtscts = 0) print 'clearing buffer' s = ser.read(10000) print 'start read' while 1: s = ser.read(1) for character in s: sys.stdout.write(" %s" % character.encode('hex')) print 'end' ser.close() output baudrate 57600: e0 e0 00 e0 00 e0 e0 e0 e0 e0 00 e0 e0 00 00 00 00 00 00 00 e0 e0 e0 00 00 00 00 e0 e0 e0 00 00 e0 e0 e0 e0 e0 00 e0 00 e0 e0 e0 e0 e0 00 e0 e0 00 00 00 00 00 00 e0 e0 e0 00 00 00 00 e0 e0 e0 00 00 e0 e0 e0 output baudrate 9600: a5 5a 0b 05 10 00 00 00 00 15 c4 56 20 6f a5 5a 0b 05 00 00 00 00 00 15 c4 56 20 5f linux terminal baudrate 57600: $stty -F /dev/ttyUSB1 57600 $stty < /dev/ttyUSB1 speed 57600 baud; line = 0; eof = ^A; min = 0; time = 0; -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke $while (true) do cat -A /dev/ttyUSB1 ; done myfile $hexdump -C myfile 00000000 4d 2d 60 4d 2d 60 5e 40 4d 2d 60 5e 40 4d 2d 60 |M-M-^@M-^@M-| 00000010 4d 2d 60 4d 2d 60 4d 2d 60 4d 2d 60 5e 40 4d 2d |M-M-M-M-^@M-| 00000020 60 4d 2d 60 5e 40 5e 40 5e 40 5e 40 5e 40 5e 40 |M-^@^@^@^@^@^@| 00000030 5e 40 4d 2d 60 4d 2d 60 4d 2d 60 5e 40 5e 40 5e |^@M-M-M-`^@^@^| 00000040 40 5e 40 4d 2d 60 4d 2d 60 4d 2d 60 |@^@M-M-M-`| 0000004c linux terminal baudrate 9600: $hexdump -C myfile2 00000000 5e 40 5e 55 4d 2d 44 56 30 4d 2d 3f 5e 40 5e 40 |^@^UM-DV0M-?^@^@| 00000010 5e 55 4d 2d 44 56 20 5f |^UM-DV _| 00000018 the specification says: 0x55 sync byte 1st 0xNNNN data length bytes (2 bytes) 0x07 opt length byte 0x01 type byte CRC, data, opt data und nochmal CRC but I'm not getting this packet structure. The output of the python script differs from the one I get via the terminal. I also wrote the python part with C, but the output is the same as with python As the USB receiver a BSC-BoR USB Receiver/Sender is used The EnOcean device is a simple button

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  • Receive the Broadcast program with XML [on hold]

    - by bitmez4
    I have a channel publishing sites and I wanna get into the channel CNN broadcast program.. CNN broadcast the program here: (you can see in source - xml File) http://tvprofil.net/xmltv/data/cnn.info/weekly_cnn.info_tvprofil.net.xml How the data according to the time of withdrawal? For example: Now program: "bitmez's table" next program: "stack's table" in 30 minute Is this possible? UPDATE 1 // -I can take the XML data but to all of XML file- <?php if(!$xml=simplexml_load_file('http://tvprofil.net/xmltv/data/cnn.info/weekly_cnn.info_tvprofil.net.xml')){ trigger_error('XML file -- read error',E_USER_ERROR); } echo 'X-'; foreach($xml as $programme){ echo 'Now: '.$programme->title.' <br/>'; } ?>

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  • bluetooth on acer travelmate laptop can send only, but don't want to receive

    - by Orosjopie
    I have a acer travelmate 5720 laptop that runs ubuntu 13.04. It has built in bluetooth. For what I can see is that Ubuntu did pick up the bluetooth and the necessary bluetooth drivers is installed. But I'm only able to send files from this laptop to bluetooth devices, but for some reason I can't do the same visa verso to the laptop, for example if I try to send a file from a blackberry 9360 it can't send, tells me failed to find service. It kicks out. I try to find more drivers to install, tried a few in ubuntu software center, but no success. I even uninstalled all bluetooth drivers and reinstalled it, but no success, it doesn't pick up any phone anymore. Please assist me.

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  • How to Send and Receive Faxes Online Without a Fax Machine or Phone Line

    - by Chris Hoffman
    Some slow-moving businesses and government agencies may not accept documents over email, forcing you to fax them in. If you are forced to send a fax, you can do it from your computer for free. We’ve previously covered ways to electronically sign documents without printing and scanning them. With this process, you can digitally sign a document and fax it to a business — all on your computer and without any printing required.    

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  • why client can not receive message from server (java) [migrated]

    - by user1745931
    I have just started learning java. I modified the client side code for a server/client communication program, by creating two threads for the client side, main thread for receiving user's input, and inputThread for receiving server's response. I am sure that server has sent the response to client, however, no response message is obtain at client. Here is my code. Can anyone help me to figure it out? Thanks package clientnio; import java.net.*; import java.nio.*; import java.io.*; import java.nio.channels.*; import java.util.Scanner; public class ClientNIO { public static int bufferLen = 50; public static SocketChannel client; public static ByteBuffer writeBuffer; public static ByteBuffer readBuffer; public static void main(String[] args) { writeBuffer = ByteBuffer.allocate(bufferLen); readBuffer = ByteBuffer.allocate(bufferLen); try { SocketAddress address = new InetSocketAddress("localhost",5505); System.out.println("Local address: "+ address); client=SocketChannel.open(address); client.configureBlocking(false); //readBuffer.flip(); new inputThread(readBuffer); /* String a="asdasdasdasddffasfas"; writeBuffer.put(a.getBytes()); writeBuffer.clear(); int d=client.write(writeBuffer); writeBuffer.flip(); */ while (true) { InputStream inStream = System.in; Scanner scan = new Scanner(inStream); if (scan.hasNext()==true) { String inputLine = scan.nextLine(); writeBuffer.put(inputLine.getBytes()); //writeBuffer.clear(); System.out.println(writeBuffer.remaining()); client.write(writeBuffer); System.out.println("Sending data: "+new String(writeBuffer.array())); writeBuffer.flip(); Thread.sleep(300); } } } catch(Exception e) { System.out.println(e); } } } class inputThread extends Thread { private ByteBuffer readBuffer; public inputThread(ByteBuffer readBuffer1) { System.out.println("Receiving thread starts."); this.readBuffer = readBuffer1; start(); } @Override public void run() { try { while (true) { readBuffer.flip(); int i=ClientNIO.client.read(readBuffer); if(i>0) { byte[] b=readBuffer.array(); System.out.println("Receiving data: "+new String(b)); //client.close(); //System.out.println("Connection closed."); //break; } Thread.sleep(100); } } catch (Exception e) { System.out.println(e); } } }

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  • git post-receive hook doesn't get promised arguments

    - by Zimno
    From the post-receive file: # This script is run after receive-pack has accepted a pack and the # repository has been updated. It is passed arguments in through stdin # in the form # <oldrev> <newrev> <refname> # For example: # aa453216d1b3e49e7f6f98441fa56946ddcd6a20 68f7abf4e6f922807889f52bc043ecd31b79f814 refs/heads/master # But when I test it with echo "$1 $2 $3", I get a blank line only. Does any-one know why?

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  • Git push from post-receive

    - by meka
    I have two servers, let's call them first and second. First one is where the real development is done, and second one should be the replica. What I would like to do is put "git push" in post-receive, but there is one problem. Post-receive is executed as the user doing git push to first server, so I can't chmod 600 ssh key with no pass. What is the best practice for this? Thanx!

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  • Scala actors: receive vs react

    - by jqno
    Let me first say that I have quite a lot of Java experience, but have only recently become interested in functional languages. Recently I've started looking at Scala, which seems like a very nice language. However, I've been reading about Scala's Actor framework in Programming in Scala, and there's one thing I don't understand. In chapter 30.4 it says that using react instead of receive makes it possible to re-use threads, which is good for performance, since threads are expensive in the JVM. Does this mean that, as long as I remember to call react instead of receive, I can start as many Actors as I like? Before discovering Scala, I've been playing with Erlang, and the author of Programming Erlang boasts about spawning over 200,000 processes without breaking a sweat. I'd hate to do that with Java threads. What kind of limits am I looking at in Scala as compared to Erlang (and Java)? Also, how does this thread re-use work in Scala? Let's assume, for simplicity, that I have only one thread. Will all the actors that I start run sequentially in this thread, or will some sort of task-switching take place? For example, if I start two actors that ping-pong messages to each other, will I risk deadlock if they're started in the same thread? According to Programming in Scala, writing actors to use react is more difficult than with receive. This sounds plausible, since react doesn't return. However, the book goes on to show how you can put a react inside a loop using Actor.loop. As a result, you get loop { react { ... } } which, to me, seems pretty similar to while (true) { receive { ... } } which is used earlier in the book. Still, the book says that "in practice, programs will need at least a few receive's". So what am I missing here? What can receive do that react cannot, besides return? And why do I care? Finally, coming to the core of what I don't understand: the book keeps mentioning how using react makes it possible to discard the call stack to re-use the thread. How does that work? Why is it necessary to discard the call stack? And why can the call stack be discarded when a function terminates by throwing an exception (react), but not when it terminates by returning (receive)? I have the impression that Programming in Scala has been glossing over some of the key issues here, which is a shame, because otherwise it's a truly excellent book.

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  • Outlook certificate error and separate send/receive error

    - by Richard
    I run a laptop with Vista 32bit and MS Office 2010. Outlook has two profiles, both configured as POP3/SMTP and neither go through an exchange server. Recently, one of the mail servers (hosted with easily) was getting full, so I changed the profile setting to delete from the server if mails are older than 60 days. Suddenly, I am now experiencing a couple of glitches. The first is that I get a certificate error when outlook tries it's first send/receive under the relevant profile - "The server you are connected to is using a security certificate that cannot be verified" This continues despite apparently successfully re-importing the certificate. The second glitch is that I get a "Sending reported error (0x8004010F): 'Outlook data file cannot be accessed'" error on send receive. Strangely, it seems to be trying to send/receive twice - once to 'mail@domain', which works, and the second to 'domain' which doesn't. I've tried deleting the profile and re-creating it, pointing to the original .pst file, but still get both errors. Does anybody know how I can resolve these errors? (As a by note, and not that important, more for curiosity, does anybody know why simply changing the delete from server setting against that profile would cause these issues?)

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  • UDP Socket Client in .NET

    - by Betamoo
    I use UDP Sokckts in my client application. Here are some code snippets: SendIP = new IPEndPoint(IPAddress.Parse(IP), port); ReceiveIP = (EndPoint)(new IPEndPoint(IPAddress.Any, 0)); socket = new Socket( AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); socket.Bind(ReceiveIP); And to Receive (while(true)): byte[] data = new byte[BUFFERSIZE]; int receivedDataLength = socket.ReceiveFrom(data, ref ReceiveIP); string s= Encoding.ASCII.GetString(data, 0, receivedDataLength); I am doing an infinite while on the receive, there are other things to be done in the while, even if nothing is received.. I want to check if there are actually available data then receive else do not wait.. (Note the current receive method waits until the server sends a message)

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  • MMS2R and Multiple Images Rails

    - by Maletor
    Here's my code: require 'mms2r' class IncomingMailHandler < ActionMailer::Base ## # Receives email(s) from MMS-Email or regular email and # uploads that content the user's photos. # TODO: Use beanstalkd for background queueing and processing. def receive(email) begin mms = MMS2R::Media.new(email) ## # Ok to find user by email as long as activate upon registration. # Remember to make UI option that users can opt out of registration # and either not send emails or send them to a [email protected] # type address. ## # Remember to get SpamAssasin if (@user = User.find_by_email(email.from) && email.has_attachments?) mms.media.each do |key, value| if key.include?('image') value.each do |file| @user.photos.push Photo.create!(:uploaded_data => File.open(file), :title => email.subject.empty? ? "Untitled" : email.subject) end end end end ensure mms.purge end end end and here's my error: /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/commands/runner.rb:48: undefined method photos' for true:TrueClass (NoMethodError) from /usr/home/xxx/app/models/incoming_mail_handler.rb:23:in each' from /usr/home/xxx/app/models/incoming_mail_handler.rb:23:in receive' from /usr/home/xxx/app/models/incoming_mail_handler.rb:21:in each' from /usr/home/xxx/app/models/incoming_mail_handler.rb:21:in receive' from /usr/local/lib/ruby/gems/1.8/gems/actionmailer-2.3.4/lib/action_mailer/base.rb:419:in receive' from (eval):1 from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in eval' from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/commands/runner.rb:48 from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from /home/xxx/script/runner:3 I sent an email to the server with two image attachments. Upon receiving the email the server runs "| ruby /xxx/script/runner 'IncomingMailHandler.receive STDIN.read'" What is going on? What am I doing wrong? MMS2R docs are here: http://mms2r.rubyforge.org/mms2r/

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  • Why I can't get all UDP packets?

    - by Jack
    My program use UdpClient to try to receive 27 responses from 27 hosts. The size of the response is 10KB. My broadband incoming bandwidth is 150KB/s. The 27 responses are sent from the hosts almost at the same time and for every 10 secs. However, I can only receive 8 - 17 responses each time. The number of responses that I can receive is quite dynamic but within the range. Can anyone tell me why? why can't I receive all? I understand UDP is not reliable. but I tried receiving 5 - 10 responses at the same time, it worked. I guess the network links are not so bad. The code is very simple. ON the 27 hosts, I just use UdpClient to send 10KB to my machine. On my machine, I have one UdpClient receive datagrams. Each time I get a data, I create a thread to handle it (basically handling it means just print out "I received 10KB", but it runs in a thread). listener = new UDPListener(Port); listener.Start(); while (true) { try { UDPContext context = listener.Accept(); ThreadPool.QueueUserWorkItem(new WaitCallback(HandleMessage), context); } catch (Exception) { } } If I reduce the size of the response down to 3KB, the case gets much better that roughly 25 responses can be received. Any more idea? UDP buffer problems???

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  • Setting up Github post-receive webhook with private Jenkins and private repo

    - by Joseph S.
    I'm trying to set up a private GitHub project to send a post-receive request to a private Jenkins instance to trigger a project build on branch push. Using latest Jenkins with the GitHub plugin. I believe I set up everything correctly on the Jenkins side because when sending a request from a public server with curl like this: curl http://username:password@ipaddress:port/github-webhook/ results in: Stacktrace: net.sf.json.JSONException: null object which is fine because the JSON payload is missing. Sending the wrong username and password in the URI results in: Exception: Failed to login as username I interpret this as a correct Jenkins configuration. Both of these requests also result in entries in the Jenkins log. However, when pasting the exact same URI from above into the Github repository Post-Receive URLs Service Hook and clicking on Test Hook, absolutely nothing seems to happen on my server. Nothing in the Jenkins log and the GitHub Hook Log in the Jenkins project says Polling has not run yet. I have run out of ideas and don't know how to proceed further.

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  • Git - post-receive hook with git pull "Failed to find a valid git directory"

    - by ludicco
    It's very weird but when setting a git repository and creating a post-receive hook with: echo "--initializing hook--" cd ~/websites/testing echo "--prepare update--" git pull echo "--update completed--" the hook runs indeed, but it never manage to run git pull properly: 6bfa32c..71c3d2a master -> master --initializing hook-- --prepare update-- fatal: Not a git repository: '.' Failed to find a valid git directory. --update completed-- so I'm asking myself now, how it's possible to make the hook update the clone with post-receive? in this case the user running the processes is the same, and its everything inside the user folder so I really don't understand...because if if I go manually into cd ~/websites/testing git pull it works without any problem... any help on that would be pretty much appreciated Thanks a lot

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  • Cannot receive email outside domain with Microsoft Exchange

    - by Adi
    This morning we couldn't receive email from outside our company's domain (domain.com.au), but we can send email to outside (e.g hotmail, gmail, yahoo). When I tried to send email to my work email address using my gmail account, I received this message Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 Unable to relay for [email protected] (state 14). I tried using telnet to send email, and it works. But still I couldn't figure out why I can't receive email from outside. I'm not sure if I provided enough info. I'll try to provide as much info as needed to help me solve the problem. Thanks

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  • Synchronizing git repository with post-receive hook

    - by eliocs
    Hello, I have a redmine server and a gitolite server on the same machine. I want Redmine's GIT repository to get updated when a commit is registered. I thought of adding a post-receive script that updates the repository: post-receive: cd home/redmine/repositories/repo git pull this doesn't work because the script is run by the gitolite user instead of the redmine user owner of the repository cloned folder. How can I change the user that executes the script inside a batch script?, is there a cleaner way of updating the repository? thanks in advance.

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  • Push notification is successfully sent, but the device does not receive (occasionally)

    - by ashiina
    I have been having a problem where some devices will not receive a push notification, since yesterday. The certificate / devicetoken seem to be correct, since the device used to successfully receive push notifications until yesterday. On the server-side, there are no errors or connection refusals, and the push notification seems to be successfully sent every time. But still, there are many occasions where the device does not correctly receive the push. Some surrounding information: I am doing this on the production environment. No errors / connection refusals on the server-side I am sending the exactly same JSON everytime. 2 of our devices are not receiving the push notification AT ALL since yesterday 1 of our device receives push notifications at a lower success rate (about 70%) than yesterday 1~2 of our devices still receive push notifications successfully even now. All of the above devices were able to receive push notifications properly on the production environment until yesterday. There is no difference in the server-side result for when the push is successful, and when the device doesn't receive it... Therefore it is virtually impossible to identify the problem. This is the server-side PHP code I am using: $ctx = stream_context_create(); stream_context_set_option($ctx, 'ssl', 'local_cert', $this->apnsData[$development]['certificate']); $fp = stream_socket_client($this->apnsData[$development]['ssl'], $error, $errorString, 100, (STREAM_CLIENT_C ONNECT|STREAM_CLIENT_PERSISTENT), $ctx); if(!$fp){ $this->_pushFailed($pid); $this->_triggerError("Failed to connect to APNS: {$error} {$errorString}."); } else { $msg = chr(0).pack("n",32).pack('H*',$token).pack("n",strlen($message)).$message; $fwrite = fwrite($fp, $msg); if(!$fwrite) { error_log("[APNS] push failed..."); $this->_pushFailed($pid); $this->_triggerError("Failed writing to stream.", E_USER_ERROR); } else { error_log("[APNS] push successful! ::: $token -> $message ($fwrite bytes)"); } } fclose($fp); The log tells me that the push was successful (Cutting out the token for privacy) : [Wed Dec 12 11:42:00 2012] [error] [client 10.161.6.177] [APNS] push successful! ::: aa4f******44 -> {"aps":{"alert":{"body":"\\u300casdfasdf\\u300d","action-loc-key":"OK"},"badge":4,"sound":"chime"}} (134 bytes) Is there any way I can get help on this problem? Or is there anybody who is having the same problem?? Please help! I am getting complaints from some users on this....

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  • windows 2003 under Hyper-V - can't send/receive ping

    - by glaucon
    I've installed Windows 2003 x64 R2 SP2 under Hyper-V (the Windows Pro 8 edition). I have a NIC configured but I can't move any traffic on it. In particular I can't send or receive Pings. Scoreboard There is a second VM running Ubuntu under the Windows 8 host which is able to send and receive pings from the host O/S . When I try to ping from Windows 2003 guest to Windows 8 host I get 'Request Timed Out'. When I try to ping from Windows 8 host to Windows 2003 guest I get 'Reply from 192.168.10.107 Destination Host Unreachable'. There's no problem pinging from the Ubuntu guest to the Windows 8 host and no problem pinging from the Windows 8 host to the Unbuntu guest. Environment Integration services are installed on Windows 2003. The windows 2003 needs a static IP address of 192.168.10.15. The Windows 2003 ipconfig output looks like this : While the host o/s ipconfig output looks like this : Event Logs The only things I can see in the event logs which is (a) looks signifcant and (b) is not related to the lack of networking is this : I'm not sure if that's significant or not. Hyper-V and NICs When the Windows 2003 guest was first booted it had no NIC; I subsequently added a 'Legacy Network Connector' which I couldn't get Windows 2003 to recognise; I subsequently removed that and added a 'Standard Network Connector' and at least on the surface this works ... only it doesn't. 'Virtual Network Type' is external. Although I've only mentioned ping there's no other evidence of network activity. 'Allow incoming echo request' is enabled on the Windows 2003 guest. HELP ? What else should I look at or do to resolve this problem ? EDIT 1: I should have said that I turned off the firewall on the W2003 server for a while and retested the pings; same result.

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  • Unable to receive emails from Ubuntu postfix mail server

    - by Paddington
    I am unable to receive emails on an Ubuntu 11.04 server running postfix with the Plesk control panel. I can't see the mails even on webmail. I am able to send emails and am not getting any error messages on the email client when I try to receive. Here is the output of the logs: *tail -f /usr/local/psa/var/log/maillog Aug 29 10:38:31 cp9 postfix/tlsmgr[3811]: fatal: open database /var/lib/postfix/smtpd_scache.db: Invalid argument Aug 29 10:38:32 cp9 postfix/master[27738]: warning: process /usr/lib/postfix/tlsmgr pid 3811 exit status 1 Aug 29 10:38:32 cp9 postfix/master[27738]: warning: /usr/lib/postfix/tlsmgr: bad command startup -- throttling Aug 29 10:38:36 cp9 pop3d: Connection, ip=[::ffff:196.201.7.158] Aug 29 10:38:36 cp9 pop3d: IMAP connect from @ [::ffff:196.201.7.158]INFO: LOGIN, [email protected], ip=[::ffff:196.201.7.158] Aug 29 10:38:37 cp9 pop3d: 1346229517.874008 LOGOUT, [email protected], ip=[::ffff:196.201.7.158], top=0, retr=0, time=1, rcvd=24, sent=1716, maildir=/var/qmail/mailnames/essentialhuku.co.za/earle/Maildir Aug 29 10:14:05 cp9 postfix/tlsmgr[1133]: fatal: open database /var/lib/postfix/smtpd_scache.db: Invalid argument Aug 29 10:14:06 cp9 postfix/master[27738]: warning: process /usr/lib/postfix/tlsmgr pid 1133 exit status 1 Aug 29 10:14:06 cp9 postfix/master[27738]: warning: /usr/lib/postfix/tlsmgr: bad command startup -- throttling Aug 29 10:14:08 cp9 pop3d: Connection, ip=[::ffff:196.201.7.158

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  • Cloudera Manager agent deploy failing to receive heartbeat from agent

    - by user150341
    All, I am getting the error on the console at the last phase of the installation: Installation failed. Failed to receive heartbeat from agent Server Log: 2012-12-19 00:32:12,132 INFO [NodeConfiguratorThread-4- 0:node.NodeConfiguratorProgress@503] 192.168.1.100: Setting WAIT_FOR_HEARTBEAT as failed and done state All nodes (name node and (2)client nodes) are VM's running 64bit CentOS. sshd has been enabled on all nodes, and VM's are set to Bridge. Any clue on how to fix this error?

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  • adding a name to existing LN group distribution and new individuals do not receive email

    - by jocelyn suba
    I made a recent edit to an existing group distribution to add a person. I've saved it. I see it in the detail of the group listing but plugging it into an email, the naming convention pops up, but not all people on the distribution actually receive the email. I tried deleting and re-adding the new person. I tried closing out then open up tto the detail, and all names show. How do i solve for this?

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  • Cannot send or receive files over Bluetooth

    - by denise
    I have a Lenovo ThinkPad laptop and running Windows Vista. Previously I could send and receive files between my phone and my laptop but now it won't work. Every time I select a file, right-click and select "Send to", and select "Bluetooth devices", the box appears but there's nothing there. Even if I turn my laptop's Bluetooth on, my phone can't find it and vice versa. What could be the problem and how can I fix this?

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