Jdeveloper connection with database error

Similar Questions

• Hi, I'm developing a simple mobile app in DW CC 2015 using JQuery Mobile. LIKE I need the list view with description of the product, functionality and image, I would like to connect with database instead of "writing" all the tables in the bearings inside

  Hi, I'm developing a simple mobile app in DW CC 2015 using JQuery Mobile. LIKE I need the list view with description of the product, functionality and image, I would like to connect with database instead of "writing" all the tables in the bearings inside the Jquery page. In the future I would also be able to add, to remove the DB records. Any help, tutorial... Thanks TG

  I would like to connect with the database instead of "writing" all the tables in the bearings inside the Jquery page

  This is usually done with a CMS (content management system). There are commercial products CMS like WordPress, Joomla and perch. You create one or several layouts and then create pages of these page layouts using the CMS. In this way, it is possible to have hundreds of pages, each with unique content, but a page layout that can be managed in a place of sharing.

  CMSs on shelf don't require programming skills. Otherwise, some of us write our own CMS with custom functions, but this requires back-end, as with PHP programming.

• Oracle Discoverer 4i (Portal db - oracle 8i) connectivity with database 11g problem

  Hi all

  We have oracle discoverer 4i with Portal db (oracle 8i).

  Connect to external databases by using links in the portal db db and reports will use the link db to retrieve data from views in external databases.

  External databases, we have been connecting is oracle 10g version and now we have improved these databases to version 11g.

  Now I have a created a new database link to this 11g database and I have created a new EUL in the portal to connect to this database 11g.

  But when I try to create a report using the discoverer of this new EUL after login for the discoverer we get an "Unable to connect to the database" error.

  We all have the privilege of necesscary to the user and the new database link works perfectly well. (when we try to query directly using SQL as database portal using this db link the query works perfectly).

  I'm not sure if it is a compatibility issue in accessing an 11g database since oracle disk 4i.

  Can any advise if this is the case and if there is no work around for this?

  Kind regards

  REDA

  You say that you are having problems with a link of database from 8i to 11 g (pl exact position of 4-digit versions)? If so, expect as database of links between these two versions are not supported. Is there a reason you can't pass the portal of databases of at least 10 g 2?

  See MOS Doc 207303.1

  HTH
  Srini

• Is it possible to connect with database/OOD indesign...

  Hello fellow Indesign user,.

  Don't know if this question belongs here or in scripts.

  I'm just a moderate user in ID CS4 and I got this arduous task to invest/find a way to use Indesign (our existing page layout software) to create ' brochures/manuals"using databases or OOD. Meaning, use a template, add code that is similar to the data entity code predefined in a database/OOD and automatically add the text/images from the database/OOD.

  We're not talking addresses or simple things like that, but brochures and manuals in different languages with different or similar operation for each machine. Some instructions are the same, and some are not. Get my drift?

  We use the ID Cs4 in the business right now, not the smartest tool to use during the production of 25 manuals various brochures/technical with different languages. Edit content in a manual, which means that we must change all 25 brochures and manuals... manually...

  Many of you may think-"why did you start ID first place". The answer: I don't know, I wasn't there then... It is not so far they have discovered-«Oh, we need a new system...» "and guess who had the task to evaluate...

  I need to know if it is possible and how we can use with database ID or OOD-system to retrieve data (for most custom with bulletin data, font, size, photos, etc.).

  Articles, links and other information would be very useful...

  Thank you!

  Vincent

  There are also InData from em software

  http://www.emsoftware.com/products/inData/

• Cannot create a repository master/connection - connection to database error

  Hello peers - I installed Oracle Data Integrator 12cR1 (12.1.3.0.0) using FWM 12 c (WLS 12.1.3) and 12.1.0.2.0 Oracle database. Once finished, I used the RCU to create patterns of master repository and knit as you can see below the image using Service name plug-in (PDBORCL) rather than Service PEH (ORCL) unlike 11 g name.

  
  

  Therefore, the major problem I faced is that when creating a master in ODI repository, is not to find the pattern mentioned in the database and it is not as PDBORCL as the SID in the settings. See images below:

  My pictures installation and Configuration. As you can see, UCR has PDBORCL as the name of Service (pluggable database).

  

  So, using the same settings from the images above, I tried to create a master repository or a connection, but it does not create one. It throws the error repository is not available . Any help is appreciated.

  Thank you!

  Hello 2632950,

  You try to use a forward slash instead of the column at the end of the jdbc url:

  JDBC:Oracle:thin:@odiobia:1521/pdbord

  Instead of

  JDBC:Oracle:thin:@odiobia:1521:pdbord

  Kind regards

  JeromeFr

• Connection with ODI error - cannot find the JDE. INI

  Hi all

  I'm ODI configuration to connect to JDE E1.

  I'm consultant JDE but not configured the DEMO for JDE environment. In this environment, JDE. INI is located in C:\Windows.

  I copied the jas.ini, jdbj.ini and jdelog.properties on the server of the ODI.

  What library path I should add the path for jde.ini?

  If it's in ODI, then, would I need to copy JDE.ini on the server of the ODI as well?

  Thanks for any input.

  May 27, 2014 06:22:31, 210 [DEBUG] - [JDBJ] connection represented by poolKey E1Local_JDE archived in pool - com.jdedwards.database.impl.physical.JDBPooledConnection@737398f

  May 27, 2014 06:22:31, 211 [DEBUG] - [JDBJ] JDBj service [main source database table] found [object librarian Local] key in the database, returned 1 entries.

  May 27, 2014 06:22:31, 215 [SERIOUS] - [JDBJ] could not find JDE. INI. java.lang.IllegalStateException: failed to locate the jde.ini file.  Must be able to locate this file in a Mobile configuration.  The path of the jde.ini must in the java.lang.System property "java.library.path".

  May 27, 2014 06:22:31, 215 [SERIOUS] - [JDBJ] Impossible to generate the password of local database WIN32 client.

  May 27, 2014 06:22:31, 224 [SERIOUS] - [BASE] com.jdedwards.database.base.JDBException: [INVALID_CONNECTION_PARAMETERS] no valid database user or password sent in.

  May 27, 2014 06:22:31, 224 [SERIOUS] - [BASE] com.jdedwards.database.base.JDBException: [INVALID_CONNECTION_PARAMETERS] no valid database user or transmitted in. com.jdedwards.database.base.JDBException password: [INVALID_CONNECTION_PARAMETERS] no valid database user or password sent in.

  May 27, 2014 06:22:31, 228 [SERIOUS] - [JDBJ] JDBConnectorImpl.connect (): search retry with the "bootstrap" F0010 record company.

  JD Edwards EnterpriseOne forum is more archived and will be read-only in date 06/06/14. You can re - ask your question in the forum of JD Edwards EnterpriseOne (MOSC) in My Oracle Support community to get a response from the support team. Please note that there is a community of premium clients only. If you want to learn more about access to MOSC, go here. Otherwise, please browse or search our community of Oracle product spaces to find another forum to post your question. Thank you!

• Cannot access the Wi - Fi connection with the error: "DNS server is not responding" on Windows 7

  So, recently, I installed a new router. After restarting my modem as indicated in after connecting the router to the modem, I was surprised to see that the wireless network has been renamed to (name) 2. I continued with the installation and soon found that it happened too much to the network from the router, and none of them does not seem to work. They tell me that the DNS server is not responding. for the last ive tried day every last problem I can be downloaded on the internet and nothing seems to work. pls help

  Original title: renamed networks and will not work

  Check if your modem has a built-in router.  If so, it should be disabled until your router works.  If this is a new router, contact the manufacturer of the router.  They will help you.

  It is not likely a problem on your computer.

• From JDeveloper fails with an error "cannot find a J2SE SDK installed to the path... »

  I just downloaded 11.1.1.7 Setup for JDev. After installation, I try to configure the JAVA_HOME path.

  However, when I start JDev I wonder "Please specify the path to the JDK Java House... »

  If I (C:\Program Files (x86)\Java\jre7\bin\java.exe - Java 7, version 51) I get an error message "could not find a J2SE SDK installed in the path c:\Program Files (x 86) \Java\jre7." and JDev ends.)

  What can I do to fix this? Thank you.

  The specified path seems to be a path of a Java JRE but not a path to a Java SDK. JDeveloper needs a complete Java SDK (e.g. JDK) but not only a JRE.

  Dimitar

• Connection with IE error

  I want to know why because when I open internet explore it allways tells me that there is an error on the page and it allways unresponsive on me how can I solve this problem

  Internet Explorer Forum
  http://social.answers.Microsoft.com/forums/en-us/InternetExplorer/threads Bruce Hagen ~ MS - MVP [Mail]

• Listener refused the connection with the following error: 12505

  Hello experts,
  
  I am facing the problem for the last two days, when I'm trying to connect to the oracle with sql developer and Jdeveloper database. Previously, it was running fing.
  
  The description of the detal problem is
  
  To perform the requested operation, an error has occurred:
  
  Listener refused the connection with the following error:
  ORA-12505, TNS:listener is not currently of SID given in connect descriptor
  
  
  Code provider 12505
  
  I tested the following text, and every thing seems fine
  ==============================================================
  
  E:\Users\Anutosh > lsnrctl services
  
  LSNRCTL for 32-bit Windows: Version 11.2.0.1.0 - Production on August 25, 2012 20:25:34
  
  Copyright (c) 1991, 2010, Oracle. All rights reserved.
  
  Connection to (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC) (KEY = EXTPROC1521)))
  Summary of services...
  Service 'CLRExtProc' has 1 instance (s).
  Instance of 'CLRExtProc', status UNKNOWN, has 1 operation for this service...
  Managers:
  "DEDICATED" set up: 0 denied: 0
  LOCAL SERVER
  The command completed successfully
  
  E:\Users\Anutosh > lsnrctl status
  
  LSNRCTL for 32-bit Windows: Version 11.2.0.1.0 - Production on August 25, 2012 20:26:13
  
  Copyright (c) 1991, 2010, Oracle. All rights reserved.
  
  Connection to (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC) (KEY = EXTPROC1521)))
  STATUS of the LISTENER
  ------------------------
  Alias LISTENER
  Version TNSLSNR for 32-bit Windows: Version 11.2.0.1.0 - Production
  Start date August 25, 2012 19:04:12
  Uptime 0 days 1 hour 22 min 1 s
  Draw level off
  Security ON: OS Local Authentication
  SNMP OFF
  D:\app\Anutosh\product\11.2.0\dbhome_1\network\admin\listener.ora Listener parameter file
  D:\app\anutosh\diag\tnslsnr\MTECH\listener\alert\log.XML log listener
  Summary of endpoints listening...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
  (DESCRIPTION = (ADDRESS = (PROTOCOL = tcp)(HOST=127.0.0.1) (PORT = 1521)))
  Summary of services...
  Service 'CLRExtProc' has 1 instance (s).
  Instance of 'CLRExtProc', status UNKNOWN, has 1 operation for this service...
  The command completed successfully
  
  E:\Users\Anutosh > tnsping orcl
  
  AMT Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on August 25, 2012 21:35:44
  
  Copyright (c) 1997, 2010, Oracle. All rights reserved.
  
  Use settings files:
  d:\app\Anutosh\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
  
  
  TNSNAMES adapter used to resolve the alias
  Try to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost) (PORT = 1521)) (CONNECT_DATA = (SERVER =
  
  DED
  (ED) (SERVICE_NAME = orcl)))
  OK (20 ms)
  
  Content of tnsnames.ora
  ---------------------------------------
  
  tnsnames.ora # Network Configuration file: d:\app\Anutosh\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
  # Generated by Oracle configuration tools.
  
  ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = CIP)(KEY = EXTPROC1521))
  )
  (CONNECT_DATA =
  (SID = CLRExtProc)
  (PRESENTATION = RO)
  )
  )
  
  ORCL =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost) (PORT = 1521))
  (CONNECT_DATA =
  (SERVER = DEDICATED)
  (SERVICE_NAME = orcl)
  )
  )
  
  Listener.ora
  -------------------
  
  listener.ora # Network Configuration file: d:\app\Anutosh\product\11.2.0\dbhome_1\network\admin\listener.ora
  # Generated by Oracle configuration tools.
  
  SID_LIST_LISTENER =
  (SID_LIST =
  (SID_DESC =
  (SID_NAME = CLRExtProc)
  (ORACLE_HOME = d:\app\Anutosh\product\11.2.0\dbhome_1)
  (= Extproc PROGRAM)
  (ENVS = "EXTPROC_DLLS=ONLY:d:\app\Anutosh\product\11.2.0\dbhome_1\bin\oraclr11.dll")
  )
  )
  
  LISTENER =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = CIP)(KEY = EXTPROC1521))
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost) (PORT = 1521))
  )
  )
  
  ADR_BASE_LISTENER = d:\app\Anutosh
  
  Init.ora
  ------------
  
  # Change '< ORACLE_BASE >' to point to the oracle base (that you specify to)
  (# install times)
  
  db_name = "ORCL".
  memory_target = 1 G
  process = 150
  audit_file_dest =' < ORACLE_BASE > / admin/orcl/adump '
  AUDIT_TRAIL = 'db '.
  DB_BLOCK_SIZE = 8192
  db_domain = "
  db_recovery_file_dest =' < ORACLE_BASE > / flash_recovery_area'
  db_recovery_file_dest_size = 2G
  diagnostic_dest = "< ORACLE_BASE >.
  Dispatchers ='(Protocol=TCP) (SERVICE = ORCLXDB)"
  open_cursors = 300
  Remote_login_passwordfile = 'EXCLUSIVE '.
  undo_tablespace = 'UNDOTBS1.
  # You can ensure that the control files are created on the separate physical
  features of #.
  control_files = (ora_control1, ora_control2)
  ' compatible ' 11.2.0 = ".

  Rajat says:
  How can I fix the ITI.
  Could you please suggest anything.

  no listener.ora file is necessary for the LISTENER to operate.
  move, rename, delete, or remove the listener.ora file & then reboot the system.

  each Oracle DB tries once every 60 seconds to register with EARPHONE as shown below

  tail -10 /u01/app/oracle/product/11.2.0/dbhome_1/log/diag/tnslsnr/bcm-laptop/listener/alert/log.xml
   host_addr='127.0.0.1'>
   25-AUG-2012 12:58:48 * service_update * v112 * 0
   
  
  
   25-AUG-2012 12:59:18 * service_update * v112 * 0
   
  
  

• Listener to refuse the connection with the following error ORA-12505

  Hi everyone, Am really new to the oracle database, I work on my school project work and am stuck in the middle of this error (listener refused the connection with the following error ORA-12505).
  
  I started the time serveral listener and it is said that 'no service supported by the LISTENER', I can't access the database via sqldeveloper including trows on the same error (listener refused the connection with the following error ORA-12505, TNS:Listener currently know of SID given in connect descriptor.) In addition, my em show red arrow down to the listener. Here are my coordinates hard & software.
  
  
  Oracle 11.1.0
  OS: Red Hat Enterprise Linux 4 (running the operating system through Vmware workstation)
  TNSNAME. ORA
  
  LISTENER2 =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  ((ADDRESS = (PROTOCOL = TCP (PORT = 1522))(HOST=localhost.localdomain))
  )
  )
  
  AUDITEUR1 =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1523))
  )
  )
  
  LISTENER =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = IPC) (KEY = EXTPROC1521))
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1521))
  
  
  
  
  Listner, ora
  
  
  
  
  LISTNER_ORCL
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1523))
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1521))
  )
  
  IMT_ADMI =
  (= DESRIPTION
  (PORT = 1522))
  (ADDRESS = (PROTOCOL = TCP (PORT = 1522))(HOST=localhost.localdomain))
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1523))
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1521))
  
  (CONNECT_DATA =
  (SERVER = DEDICATED)
  (SERVICE_NAME = imt_admin
  )
  )
  
  LISTENER_IMTADMIN =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP (PORT = 1522))(HOST=localhost.localdomain))
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1523))
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1521))
  
  )
  
  ORCL =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1523))
  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1521))
  
  (CONNECT_DATA =
  (SERVER = DEDICATED)
  (SERVICE_NAME = orcl)
  
  I read on some forums that I need to edit somethings that am not sure cos I don't want to mess with the database, I need help on what to.
  Thanks for the help in advance.

  (ADDRESS = (PROTOCOL = TCP)(HOST=localhost.localdomain) (PORT = 1521))

  Try to edit listener.ora by:
  (ADDRESS = (PROTOCOL = TCP) (HOST = HOST_NAME_OF_YOUR_DATABASE_MACHINE/OR TRY USING THE IP ADDRESS OF THE DATABASE SERVER MACHINE)(PORT=1521))
  Just try to edit HOST = value line above. You must use HOST_NAME_OF_YOUR_DATABASE_MACHINE or IP OF the DATABASE SERVER MACHINE.

  Host name can be obtained by the hostname command on the database server.

  With localhost, no one can connect to the database remotely.

  Concerning
  Girish Sharma

  Published by: Girish Sharma January 11, 2013 18:26

  then after the output of commands below:
  lsnrctl stop
  lsnrctl start
  Wait 60 seconds...
  ORACLE_SID =
  sqlplus scott/tiger@tnsname

  Show us what is happening now.

• SP2-0640: not connected - create database link error Gateway

  While trying to connect through the gateway SQL by using 'Create database link','m ' SP2-0640: not connected "error. Here are the details.
  
  ====================================================================
  TNSNAMES.ora
  dg4msql =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost) (PORT = 1521))
  (CONNECT_DATA =
  (Service_name = dg4msql))
  (HS = OK)
  )
  ====================================================================
  LISTENER.ora
  SID_LIST_LISTENER =
  (SID_LIST =
  (SID_DESC =
  (SID_NAME = dg4msql)
  (ORACLE_HOME = C:\product\11.2.0\tg_1)
  (PROGRAM = C:\product\11.2.0\tg_1\bin\dg4msql)
  )
  )
  
  LISTENER =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost) (PORT = 1521))
  )
  )
  
  ADR_BASE_LISTENER = C:\product\11.2.0\tg_1
  ====================================================================
  SQLNET.ora
  # This file is actually generated by netca. But if customers can opt for
  # install 'Software Only', this file does not exist and without the native
  authentication #, they will not be able to connect to the database on NT.
  
  SQLNET. AUTHENTICATION_SERVICES = (NTS)
  
  NAMES. DIRECTORY_PATH = (TNSNAMES)
  
  ====================================================================
  initdg4msql.ora
  HS_FDS_CONNECT_INFO = sqlserverip, port / / PMDB
  HS_FDS_TRACE_LEVEL = OFF
  HS_FDS_RECOVERY_ACCOUNT = RECOVERY
  HS_FDS_RECOVERY_PWD = RECOVERY
  
  ====================================================================
  lsnrctl start outupt
  The State of the application "dg4msql" UNKNOWN, has 1 handler for this service...
  The command has been executed
  
  ====================================================================
  tnsping output
  
  Settings file that is used:
  C: \ Product------11.2.0------tg_1------network-admin------sqlnet.ora
  
  has been used TNSNAMES adapter to resolve the alias
  Try to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP) (HOST = localhost) (PORT = 1521)) (CONNECT_DATA = (SERVICE_NAME = dg4msql)) (HS = OK))
  OK (20 ms)
  
  ====================================================================
  
  creation of link db output
  
  SQL * more: Production release 11.2.0.2.0 on Lun Ott 8 12:03:08 2012
  
  Copyright (c) 1982, 2010, Oracle. All rights reserved.
  
  SQL > CREATE DATABASE LINK dblink PUBLIC CONNECT WITH As IDENTIFIED BY Manager1 USI
  NG 'dg4msql ';
  SP2-0640: not connected.

  most of the foreign bases are case-sensitive and default Oracle moves all uppercase. To keep the name of an object you should always be surrounded by double quotes and make sure tzhat you write the name exactly as it is defined in the foreign database, for example:
  Select 'id' from 'TEST"@ln;

• When connecting with DB name Error Getting

  Conn scott/tiger@Db1;
  I got error like:
  ERROR:
  ORA-12541: TNS:no listener.
  But if I write like
  
  Enter user_name: scott
  Enterr password: *.
  Connect with success.
  
  Why it happened what is the reason.
  Please give the reason
  Thank you

  Using the first case, you can access the remote database using the connect identifier specified n your tnsname.orafile

  Also the user through which you connect should be available in the remote database.

  Suppose I want to connect to a remote user scott database while the user must be present in the remote database, so only he can connect

• Error when connect with RMAN

  When I connect to RMAN, gatting this error
  
  RMAN-00571: ===========================================================
  RMAN-00569: = ERROR MESSAGE STACK FOLLOWS =.
  RMAN-00571: ===========================================================
  RMAN-00554: initialization of the package manager internal collection failed
  RMAN-04005: target database error:
  ORA-01031: insufficient privileges
  
  provide a solution to solve.

  You need to connect with SYSDBA privileges: http://download.oracle.com/docs/cd/E11882_01/backup.112/e10642/rcmquick.htm#BRADV89348

• Listener refused the connection with the following error: ORA-12505

  Hello
  

  Listener refused the connection with the following error: ORA-12505, TNS:listener does not currently know of SID given in connect descriptor The Connection descriptor used by the client was: 127.0.0.1:1521:XE 

  Windows XP + Oracle 10.1.0.20
  
  I checked my *.ora files and found the host 127.0.0.1 but I noticed by running the netstat command on prompt back most of my ports is captured by www.360.cn including 1521
  
  When I try to stop the following message is displayed:

  ORA-01034: ORACLE not available
  ORA-27101: shared memory realm does not exists

  Thank you and best regards

  Hello

  [oracle@myoramachine ~]$ oerr ora 12505
  12505, 00000, "TNS:listener does not currently know of SID given in connect descriptor"
  // *Cause:  The listener received a request to establish a connection to a
  // database or other service. The connect descriptor received by the listener
  // specified a SID for an instance (usually a database instance) that either
  // has not yet dynamically registered with the listener or has not been
  // statically configured for the listener. This may be a temporary condition
  // such as after the listener has started, but before the database instance
  // has registered with the listener.
  // *Action:
  //  - Wait a moment and try to connect a second time.
  //  - Check which instances are currently known by the listener by executing:
  //    lsnrctl services 
  //  - Check that the SID parameter in the connect descriptor specifies
  //    an instance known by the listener.
  //  - Check for an event in the listener.log file.
  [oracle@myoramachine ~]$
  

  1. check the lsnrctl services

  2 check the tnsping output:

  tnsping MYORACLE

  3. check the connectivity to the computer hosting your Oracle server to the port (I guess 1521):

  Telnet 1521

  4. in case you are not able to connect to the Oracle Server - I investigate it in several directions:

  -problem of network infrastructure

  -some process disturbing / virus on the server Oracle itself

  -firewall problem

  Good luck!

  ---------------------------------
  http://DBA-star.blogspot.com/