Develop Reference

Socket write error with activejdbc

I have a pretty simple commandline app that runs inside of eclipse that connects to an Oracle 12 database and issues a pretty simple query. I'm getting the following exception:
Exception in thread "main" org.javalite.activejdbc.InitException: Failed to connect to JDBC URL: jdbc:oracle:thin:#oratest2a.emspic.org:1521:workstst
at org.javalite.activejdbc.DB.open(DB.java:93)
at org.javalite.activejdbc.Base.open(Base.java:64)
at org.emspic.works.RegistrationUtil.doMain(RegistrationUtil.java:135)
at org.emspic.works.RegistrationUtil.main(RegistrationUtil.java:75)
Caused by: java.sql.SQLRecoverableException: IO Error: Connection reset by peer: socket write error
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:752)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:666)
Code throwing the exception is basically this:
// use properties to open the datasource for work
System.out.println("Opening database connection.");
logger.info("Opening database");
String dbDriver = dbProps.get("dbDriver");
String dbURL = dbProps.get("dbURL");
String username = dbProps.get("username");
String password = dbProps.get("password");
Base.open(dbDriver, dbURL, username, password);
logger.info("Database successfully opened.");
Everything I've googled indicates the problem is a "network issue"...except that on this same machine, I am currently connected to the very table I'm trying to open via TOAD...and I also am running a jboss as server connecting to that very same database...so there is no way it is a network problem.
I'm at a total loss.
Java1.8, ojdbc7.jar, all running on a Microsoft Surface Pro 3..., Oracle version is 12.0.2 running remotely.

Your exception has nothing to do with AcitveJDBC. There is a problem with your Oracle configuration. I bet you will get the same exception if you try just JDBC with the same parameters. When/if you fix your issue with JDBC, ActiveJDBC will work just fine.

How to resolve the following oracle error?

I am using weka and oracle 11g r2 as my database to store the decision trees for id3 based incremental learning.After configuring weka and oracle,with necessary edits am getting the following error.Please help me resolve it as my project deadline is coming soon.Thanks in advance!!!!!!!
in start1java.sql.SQLException: Listener refused the connection with the following error:
ORA-12514, TNS:listener does not currently know of service requested in connect descriptor
java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connectionin bothjava.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection

Could not create oracle database connection from jboss

During my development, server(jboss4.0) was restarted because of some changes in java source and server failed to restart with the below stacktrace.
[JBossManagedConnectionPool] Throwable while attempting to get a new connection: null
org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=186647552)(ERR=12514)(ERROR_STACK=(ERROR=(CODE=12514)(EMFI=4)))))
at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:179)
at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:565)
at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:250)
at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:491)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:341)
at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:301)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:396)
at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:842)
at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:88)
at org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:69)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:72)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1881)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1174)
Caused by: java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=186647552)(ERR=12514)(ERROR_STACK=(ERROR=(CODE=12514)(EMFI=4))))
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:333)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:404)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:468)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)
at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:171)
... 150 more
17:51:19,271 WARN [SettingsFactory] Could not obtain connection metadata
org.jboss.util.NestedSQLException: Could not create connection; - nested throwable: (java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=
I have even successfully tested connection with a standalone java program and with ping. Also it is connecting from my oracle sql developer. I'm using oracle 9i.
What could be the reason as its suddenly getting into this error?

Can not create a database in my computer. java.sql.SQLNonTransientConnectionException error

I can not create a database in my computer. When I tried changing the java.policy file, it denied my access. I don't know what's going on. But on netBeans I saw this error:
"An error occurred while creating your database:
java.sql.SQLNonTransientConnectionException:
java.net.connectException: Error connecting to server localhost on
port 1527 with message. Connection refused. "
What's going on. How can I fix this problem, and create a database with out my operating system denying my own access?

Listener refused the connection with the following error: ORA-12514

I am trying to connect to an Oracle Database using java and JDBC code. I can't do that because I get the error below:
java.sql.SQLException: Listener refused the connection with the
following error: ORA-12514, TNS:listener does not currently know of
service requested in connect descriptor
What is the reason for the error and how to fix it ?
PS-
Out of all the DBMS, Oracle express 11g seems to be the most complicated and difficult to use.
Is that really the case ?

Listener does not currently know of service requested in connect
descriptor
Self explainatory. You're requesting connection to a service or instance in a DB that the DB's listener does not know, so it says "I have no clue".
Check the way you installed your Oracle 11g express. Remember that the service name there is often "xe".

I resolve this issue by increasing RAM size of my Virtual machine because i installed oracle
in VM that require more memory. So this could be one reason for your problem.