Database connection opened in CellRenderer?

Similar Questions

• Should I keep an open database connection?

  Hello

  I am currently working on a project where we have measuring stations various sending data to a central computer for analysis. We decided to move to SQL server as our main permanent storage.

  The question is this: measuring stations maintain a constant connection to the database or must they connect/disconnect if necessary?

  Keep the connection open saving on connection time ~ 300ms and possible multiple consecutive db access, this could become a problem. Also, if I keep the connection open I have no way of knowing when the station loses connection with the DB until I'm actually trying to interact with it.

  So to keep the connection open with the likely logic above to establish if the station is connected and reconnect if necessary or can I just simply open and close the connection, to the need, which would avoid the tests, but incur a time penalty ~ 300ms on each DB operation?

  I look forward to your advice and guidance.

  Tjoppi

  When sending data every 23 seconds I would keep the open DB connection. As you say, you may need to do the error handling when the writing task fails due to an interruption of DB connection.

• database connection status indicator

  I want to put something on the front of my program which will indicate the status of database connection. I think to ask at the tables in the list (it should be displayed), if the connection is good, it shows error. I tried and I think it works very well, but I don't know if it's the right way to do it, there may be better ways there, could someone point out he for me?

  Best regards

  You certainly don't want to open and close the connection. Maybe it will fail, but the 'real' connection is good. Maybe the real one has failed but this other works opening and closing. This could happen if the server has the maximum number of connections.

  Your connection is little go far?

  A simple method to check the connection just must have a loop that executes periodically a meaningless statement.

  

• Calling stored procedures with parameters with the database connectivity Toolkit

  Hi all

  I'm new to the forum and struggling to find a solution to a particular problem I have in this respect, using the LabVIEW Database Connectivity Toolkit on a project, I am currently working on my work.  I have a database in which I tables and stored procedures with parameters.  Some of these stored procedures have input, output and return parameters.

  I tried to follow this example, but to no avail: http://digital.ni.com/public.nsf/allkb/07FD130746083E0686257300006326C4?OpenDocument

  Such a stored procedure I am working on the implementation is named "dbo.getAllowablePNs", running "SELECT * from DeviceType" (DeviceType is the table).  In this case, it requires no input parameter, it has an output parameter that generates the table [cluster] and has a return parameter that returns an integer value (status code for execution) to show if an error occurred.  The DeviceType table has 3 columns; ID (PK, int not null), PN (nvarchar ((15), null) and NumMACAddresses (int, null).)  I have surpassed many examples and I talk to the support OR try to implement this and similar procedures stored in LabVIEW but have not been successful.  I am able to connect to the database with the VI of open connection without error, but spin in some confusion as a result of this step.  I then try to use the VI of parameter query create to call the stored procedure and set the parameters.  I guess I would then use the Set parameter value for each parameter that is connected to the entry of parameters on the previous query with parameters VI VI?  I am also having some confusion during and after these steps as well.  I would greatly appreciate advice or suggestions that anyone could have in this situation because I am not a SQL expert.  Also, I would be happy to provide more information that might be useful.

  Kind regards

  Jon

  Here's what I use to do this.  I think I had to change him create parameterized query VI for him to work.  There is a post on the forum about this somewhere.

  

• How to question dignosis between P6 web and database connection problem.

  Hi all

  Initially we have access to P6 via a URl server http://ip: 7001 / p6

  We have migrated our server to the new support. now above the URL does not work.

  but instead of the IP if I get p6 URL, server name opens http://servername:7001 / p6

  But I am not able to connect. (I'm not able to extend the button Advanced also to see the name of the database).

  I think that P6 does not connect to the database. (Our database is available on another machine and I can ping this machine server request P6).

  Please let me know, how can I diagnose this problem of connectivity.

  
  

  On the server where P6 is installed, run the dbconfigpv.sh/cmd again and reconfigure the database connection. Also, run adminpv.sh/cmd. Login with privuser and check the connection to the base there. Test to verify that it is able to connect to the database. If you change any setting then restart weblogic server for the change to take into account.

• Strange delay in database connections

  We are witnessing a strange delay when our JDBC client tries to make 4 connections to the database. The first connection takes 27 seconds (sometimes more) and 3 other connections are less than 1 second. As you can see in the ourJDBCclient log number 0 started at 09:09:11 connection request. He hit the listener at 09:09:11, and a strange gap of 27 seconds before ourJDBCclient reports a successful connect at 09:09:38 on the second line of the ourJDBCclient newspaper. In the source code, open connections are called right after the other. No idea where delay could come from?
  
  We run Oracle 11.2.3 EE server on Linux 2.6.18 - 92.el5
  
  Journal of ourJDBCclient:
  February 28, 2013 * 9:09:11 * AM paradigm.ems.dbobjects.implementations.JDBC.DBObjectConnectionHandler openConnection FINE: opening connection: jdbc:oracle:thin:@ourserver.ourdomain.com:1521:oursid, OURJDBCCLIENT
  February 28, 2013 * 9:09:38 * AM paradigm.ems.dbobjects.implementations.JDBC.DBObjectConnectionHandler openConnection FINE: successfully connected to the database (number 0 connection)
  February 28, 2013 09:09:38 paradigm.ems.dbobjects.implementations.JDBC.DBObjectConnectionHandler openConnection FINE: opening connection: jdbc:oracle:thin:@ourserver.ourdomain.com:1521:oursid, OURJDBCCLIENT
  February 28, 2013 09:09:38 paradigm.ems.dbobjects.implementations.JDBC.DBObjectConnectionHandler openConnection FINE: successfully connected to the database (connection number 1)
  February 28, 2013 09:09:38 paradigm.ems.dbobjects.implementations.JDBC.DBObjectConnectionHandler openConnection FINE: opening connection: jdbc:oracle:thin:@ourserver.ourdomain.com:1521:oursid, OURJDBCCLIENT
  February 28, 2013 09:09:38 paradigm.ems.dbobjects.implementations.JDBC.DBObjectConnectionHandler openConnection FINE: successfully connected to the database (number 2 connection)
  February 28, 2013 09:09:38 paradigm.ems.dbobjects.implementations.JDBC.DBObjectConnectionHandler openConnection FINE: opening connection: jdbc:oracle:thin:@ourserver.ourdomain.com:1521:oursid, OURJDBCCLIENT
  February 28, 2013 09:09:38 paradigm.ems.dbobjects.implementations.JDBC.DBObjectConnectionHandler openConnection FINE: successfully connected to the database (number 3)
  
  Listener.log:
  February 28, 2013 * 09:09:11 * (CONNECT_DATA = (SID = oursid) (CID = (= JDBC Thin Client PROGRAM) (HOST = __jdbc__) (USER = ourjdbcclientuser))) * (ADDRESS = (PROTOCOL = tcp (PORT = 56495))(HOST=10.0.10.1)) * establish * oursid * 0
  February 28, 2013 09:09:13 * (CONNECT_DATA = (SERVICE_NAME = othersid1.ourserver.ourdomain.com) (INSTANCE_NAME = othersid1) (CID = (PROGRAM = oracle) (HOST = qa001.ourdomain.com)(USER=oracle))) * (ADDRESS = (PROTOCOL = tcp (PORT = 47848))(HOST=10.0.10.34)) * establish * othersid1.ourserver.ourdomain.com * 0
  February 28, 2013 09:09:16 * (CONNECT_DATA = (SERVICE_NAME = othersid1.ourserver.ourdomain.com) (INSTANCE_NAME = othersid1) (CID = (PROGRAM = oracle) (HOST = ourserver.ourdomain.com)(USER=oracle))) * (ADDRESS = (PROTOCOL = tcp (PORT = 38159))(HOST=10.0.10.35)) * establish * othersid1.ourserver.ourdomain.com * 0
  February 28, 2013 09:09:22 * service_update * othersid1 * 0
  February 28, 2013 09:09:32 * (CONNECT_DATA = (SERVICE_NAME = othersid1.ourserver.ourdomain.com) (INSTANCE_NAME = othersid1) (CID = (PROGRAM = oracle) (HOST = ourserver.ourdomain.com)(USER=oracle))) * (ADDRESS = (PROTOCOL = tcp (PORT = 38165))(HOST=10.0.10.35)) * establish * othersid1.ourserver.ourdomain.com * 0
  February 28, 2013 09:09:37 * (CONNECT_DATA = (SERVICE_NAME = othersid1.ourserver.ourdomain.com) (INSTANCE_NAME = othersid1) (CID = (PROGRAM = oracle) (HOST = ourserver.ourdomain.com)(USER=oracle))) * (ADDRESS = (PROTOCOL = tcp (PORT = 38166))(HOST=10.0.10.35)) * establish * othersid1.ourserver.ourdomain.com * 0
  February 28, 2013 * 09:09:38 * (CONNECT_DATA = (SID = oursid) (CID = (= JDBC Thin Client PROGRAM) (HOST = __jdbc__) (USER = ourjdbcclientuser))) * (ADDRESS = (PROTOCOL = tcp (PORT = 56496))(HOST=10.0.10.1)) * establish * oursid * 0
  February 28, 2013 * 09:09:38 * (CONNECT_DATA = (SID = oursid) (CID = (= JDBC Thin Client PROGRAM) (HOST = __jdbc__) (USER = ourjdbcclientuser))) * (ADDRESS = (PROTOCOL = tcp (PORT = 56497))(HOST=10.0.10.1)) * establish * oursid * 0
  February 28, 2013 * 09:09:38 * (CONNECT_DATA = (SID = oursid) (CID = (= JDBC Thin Client PROGRAM) (HOST = __jdbc__) (USER = ourjdbcclientuser))) * (ADDRESS = (PROTOCOL = tcp (PORT = 56498))(HOST=10.0.10.1)) * establish * oursid * 0
  February 28, 2013 09:09:40 * service_update * othersid1 * 0
  February 28, 2013 09:09:40 * service_update * othersid1 * 0
  February 28, 2013 09:09:42 * (CONNECT_DATA = (SERVICE_NAME = othersid1.ourserver.ourdomain.com) (INSTANCE_NAME = othersid1) (CID = (PROGRAM = oracle) (HOST = ourserver.ourdomain.com)(USER=oracle))) * (ADDRESS = (PROTOCOL = tcp (PORT = 38169))(HOST=10.0.10.35)) * establish * othersid1.ourserver.ourdomain.com * 0
  February 28, 2013 09:09:47 * (CONNECT_DATA = (SERVICE_NAME = othersid1.ourserver.ourdomain.com) (INSTANCE_NAME = othersid1) (CID = (PROGRAM = oracle) (HOST = ourserver.ourdomain.com)(USER=oracle))) * (ADDRESS = (PROTOCOL = tcp (PORT = 38170))(HOST=10.0.10.35)) * establish * othersid1.ourserver.ourdomain.com * 0

  Note that you referred, stipulates however a fix in 11.2.0.3 - so perhaps Oracle has of a workaround in this version? Or a better way to do what to do.

  This score gave strace results where socket connect() calls are made to (DNS?) IP addresses on port tcp 53 (DNS service port). That seems to be the problem... However, the note provides more technical details.

  And seeing that 11.2 is widely used and not widely, this occurs, it means something different in your installation and/or the environment.

  It would also be that this note has nothing to do with the question that you have, apart from sharing similar symptoms.

  I'd still go to isolate the error using SQL * more than the client (with debugging SQL * Net tracing on). Once the error can be triggered reliably somehow, then I turn on the SQL Server side * Net / debug tracing listener and resort to using commands like lsof and strace.

  You can also file an SR with Oracle support and let them provide you with clear instructions of what to do in order to provide useful diagnostics to solve the problem.

• Too many connections open for integration with QA Oracle WebLogic JMS

  Is there a document explaining the number of database connections required by the factories of connection and/or the queue? I configured a foreign server with destinations and connection factories to integrate with AQ JMS WebLogic. I have 16 destinations (14 lines and 2 subjects) and two plants (a XAQueueConnectionFactory and a XATopicConnectionFactory) connection configured. I have also 16 multilateral development banks, one for each destination, configured with max-beans-in free-pool value 1. Everything works fine. However, when the application server is started, I could see that there are 68 open database connections. This seems too high. When using OC4J we had max-connections set to 30 and it was working fine. Why are so many open connections?

  Battery stuck trace, the particular version of the WebLogic you use, uses the receiver of messages JMS QA for voting message and sets an ExceptionListener on JMS connection. (I think that your MDB is a non transactional MDB). The JMS AQ message sink uses a db of the query message connection and the implementation of the QA JMS ExceptionListener uses internally a db periodically ping the database connection. If your MDB uses two connections in your configuration.

• I can't get a database connection.

  Background: I have already built two sites with databases using DW CS6, PHPMySQL and the same hosting company, so I know that they allow remote connections. (I developed using the remote host, because I have never found a tutorial for how to move all local XAMPP to my host - but well, it's been working well so far.)

  I set up the database using CPanel databases, added the user and the password, no problem. Entered PHP MySQL and adding a table, connected to the back and back, the table is there, as defined.

  In DW, I checked the server tests, tested the connection, and it connected successfully.

  Then I open a page for editing and added a database connection (just as I had done on the two previous sites that work very well). I named the connection, entered the password to the user, and tried to SELECT a database. No luck. HTTP 404 error. Manually, I added the database (the only one) and clicking test. Again not luck. FPPH 404 error.

  I double checked the testing server, double checked the DB information, and nothing seems to work.

  No idea what I'm doing wrong? Thanks a lot if you can help.

  You can check with your host service.  Note you work by CPanel and so did I have some time back.  Had a similar problem, all worked locally but not on the online site.

  The connection strings MqSQL need to have the cPanel login ID by preceding the name of the database and the username

  (eg., I worked a tutorial (check_mag); DW has developed connection container file:

  $hostname_check_mag = "localhost";

  $database_check_mag = "php_test";

  $username_check_mag = "phptestuser".

  $password_check_mag = "Sue";

  $check_mag = mysql_pconnnect ($hostname_check_mag, $database_check_name, $username_check_mag, $password_check_mag) or trigger_error (mysql_error (), E_USER_ERROR);

  I was informed by the host support that $database_check_mag = "cpanelid_php_test" (for example: "zyxwvu_php_test") [where zyxwvu is formatted in the same way my cpanel id AND the variable $username.

  I don't use this host longer so don't know if they have changed things since then.  Worth a try!

  Tom

• ICP-02002, create a new database connection

  I'm multiplex a new database connection in my JDEv application.
  All right, but when I try to record (with Save password verified) I get the following error and the configuration.xml file is not updated.
  June 15, 2011 15:47:46 oracle.security.jps.internal.credstore.ssp.CsfWalletManager openWallet
  ATTENTION: Portfolio based store of credentials failed. Reason for java.io.IOException: ICP-02002: could not open the wallet. Check the password.
  June 15, 2011 15:47:46 oracle.jdevimpl.db.DefaultEditor launchEditor
  WARNING: Could not save connection: cannot save the database connections: oracle.security.jps.service.credstore.CredStoreException: JPS-01050: portfolio based store of credentials failed. Reason for java.io.IOException: ICP-02002: could not open the wallet. Check the password.
  
  What is the problem?
  TKS
  Tullio

  tullio0106 wrote:
  ... fsrc/META-INF directory is in the same directory of the workspace and not in any project.

  That's right, in the workspace to the src/META-INF (not fsrc/META-INF).

  The file is binary and should not be opened/saved with any editor. Try to remove and reconfigure the connection in JDeveloper. Save the password so that it is recreated.

  Hope it works.

• Several connections open db in a weblogic cluster

  We have created a weblogic with oracle database cluster.
  Whenever we start the cluster (managed server), there are a lot of connections open in the database (about 150 in the database). Although we have a maximum capacity of cgDataSource, cgDataSourcenoXA and wlsjmsreportDS 20. So ideally should be not more than 60 connections open at any time.
  We use 10gR 3 OSB in 64-bit Linux platform.

  The maximum capacity for a data source is by node in the cluster (if it is targeted on the cluster).

  So if you have 3 sources of data, with a maximum capacity of 20 nodes of each and two in your cluster you should have about 3 * 20 * 2 = 120 connections.

  Of course to start WebLogic creates only the number of connections specified in the initial capacity.

• 63 error to TCP connection open in Simple data Client.vi when connecting to the network storage device.

  Hello

  I tried the simple data client and simple example of data server. I tried this example to connect to a NAS device. My laptop properly communicates with the device since I ping the address of the NAS device and discovered it works perfectly fine. Also, I put the static IP of my pc even as the NAS. So everything I've done. But when I run the program giving the ip address of a NAS device, it shows an error 63.

  Error 63 to TCP connection open in Simple data Client.vi

  Possible reasons: LabVIEW: serial port receive buffer overflow. = LabVIEW: the network connection was refused by the server.

  Why is happening. What can be done to solve this problem. Thanking you.

  vindsan wrote:

  What is the firewall of the SIN.

  Yes, it is very likely. Try disabling the firewall and try again. If the code works when you run the Server & client on your machine, but not when you run the server on your NAS and client on your machine (assuming you have entered the correct port for the NAS server), then it is very likely to be a firewall problem.

  vindsan wrote:

  Server that is listening is no longer VI also means what.

  Your VI server listens only once for a connection after receiving an incoming connection (or it expires after 60 years), he stops listening and the port will be more open for incoming connections - you must re - run the VI for another connection. With your code, you must run the VI server and then run the VI client in the 1960s, so it's not expire.

• Database connectivity Kit

  Hello

  I use the database connectivity toolkit to create a Microsoft access database.  I'm new to the Toolbox.  I've read the tutorials online and following the instructions.  I created an empty Microsoft Access file with an .mdb extension.  I also created a link to data .udl with tools > create data... in LabView and linked to the mdb file.  My code VI is attached.  I get the following error when I run the program (also attached).  I don't know what causes this error.  I appreciate your help.

  Thank you

  You can not create a table with the name "table".  It is a key word.

• Reading large data using the database connectivity

  Hello

  I use the Labview database connectivity toolkit to connect to my database sqlitev3 (I'm using ODBC). I just have to connect to the database (using the block of open_connection) and read all the values inside (using the select_data block). The problem is that my database is huge (about 2 GB), and I get this error:

  . VI NI_Database_API.lvlib:Rec FETCH Recordset Data (R)-> NI_Database_API.lvlibB Tools Select Data.vi-> real_web.vi-> real_web.vi.ProxyCallerADO error: 0x8007000E Exception occurred in provider: not enough memory is available to complete this operation. in .vi NI_Database_API.lvlib:Rec Fetch Recordset Data (R)-> NI_Database_API.lvlibB Tools Select Data.vi-> real_web.vi-> real_web.vi.ProxyCaller

  What should I do? It seems that he reads the data in the memory and it doesn't have enough space for it. When I read the data I want to write to a file.

  

  Read it in pieces. Write each piece to the file, and then repeat with the next segment. Try to read and process all data in one shot is not very practical and you found out will not work.

• problem to generate an installation program for a project of database connectivity

  Hello

  I create a project using labview 2011, this project all simply select, edit and insert a file of access database by using the database connectivity Toolkit.

  There is no problem when I run this labview project, everything is perfect, but when I create a Setup program to run this project from another computer, I found something strange...

  the project do not insert or update the database, but it may choose the form, so I can say that the connection is good, so can any body tell me what is the problem.

  Help, please

  Thank you

  
  

• How to send the SQL for SQL Server statement and return data without using database connectivity Kit?

  Hi, I tried to figure out how to extract data from my SQL Server databases and reading messages and to do some tests with examples, I can get data connection type in my SQL server, but so far nothing helps.  Is it possible to get data from a SQL Server database without using the database connectivity Toolkit?  and if so, how?  are there whitepapers and/or examples of this?  So far, I can't find something that works.  Thank you.

  Jesse - what is your reason for not using the database connectivity Toolkit? It is by far the best way to recover the data.