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Caused by: java.net.ConnectException: Connection refused: no further information

When I run this programm it show this mistake. Dose it because i donot run the service? How to writ config files for the following code?
com.zeroc.Ice.ObjectPrx obj = communicator.stringToProxy("IceStorm/TopicManager:tcp -p 10000");
com.zeroc.IceStorm.TopicManagerPrx topicManager = com.zeroc.IceStorm.TopicManagerPrx.checkedCast(obj);

You need to run the IceStorm service to be able to connect to it, IceStorm/TopicManager is an object hosted by IceStorm service.
if you want to define the topic manager using a property you should use communicator.propertyToProxy instead of communicator.stringToProxy and define the proxy in the configuration file used to initialize the configuration.
com.zeroc.Ice.Communicator communicator = com.zeroc.Ice.Util.initialize(args, "config.sub", extraArgs);
com.zeroc.IceStorm.TopicManagerPrx manager = com.zeroc.IceStorm.TopicManagerPrx.uncheckedCast(
communicator.propertyToProxy("TopicManager.Proxy"));
You should check IceStorm clock demo.

Lotus Notes Java replication of remote database

I have a lot of Lotus Notes / Domino (version 7) database to migrate to a new software.
On my workstation (with Lotus Notes installed), I'm using a standalone Java application to connect to a local replica an extract data.
However the replication of the distant database is still a manual process. I'd like to automatise it.
My java code basically looks like this :
Session localSession = NotesFactory.createSession(); // With Notes thread initialized
Session remoteSession = NotesFactory.createSession(SERVER, USER, PASSWORD);
Database localDb = localSession.getDbDirectory(null).openDatabase("local_name", true);
Database remoteDb = remoteSession.getDbDirectory(null).openDatabaseByReplicaID(REPLICA);
// ***EDITED CALLING INSTANCE BELOW***
remoteDb.createReplica(null, "local_name"); // Error thrown here
However the last line throws an exception (from memroy, but something like)
CN=****/***** does not have the right to create database on a server
How is it possible that I don't have the right to create database on my local computer ?
Is there any other way to programmaticly create a local replica from a distant database ?
Edit: changed calling instance of create replica to match my code causing the issue

My guess is that it's just giving you the wrong error message. One thing that's definitely wrong is that he first argument for createReplica should be an empty string, not a null pointer. I.e., try this:
localDb.createReplica("", "local_name");

Ok it looks like I found the answer.
AFAIU I had to open the database on the target server, using my local session, and run the createReplica() from here. This way, the createReplica is executed on my local Lotus Notes server, and the replica is created locally.
Session localSession = NotesFactory.createSession((String)null, (String)null, PASSWORD);
DbDirectory remoteDbDirectory = localSession.getDbDirectory(remoteSession.getServerName());
Database localSessionRemoteDatabase = remoteDbDirectory.openDatabaseByReplicaID(REMOTE_REPLICA_ID);
localSessionRemoteDatabase.createReplica("", LOCAL_FILE_NAME);
#Richard Schwartz Can you confirm this is ok ?
The only weird thing, is that it opens a prompt (like when it's expecting password) but the replica is created.
The process is executed within Eclipse.

Detect invalid credentials being passed to c3p0 connection pool

I'm writing a program that does some stuff on the database. Users are allowed to configure db processes, by passing db host port, type and credentials. It all works fine when values are correct. But when user passes invalid credentials I would like to show an error. So here is the part where I create my connection pool
ComboPooledDataSource cpds = new ComboPooledDataSource();
cpds.setJdbcUrl( connectionUrl );
cpds.setUser(username);
cpds.setPassword(password);
And later to verify if all is ok with the connection I do
cpds.getConnection()
I would expect to get some SQLException with vendor specific error saying that credentials are invalid (which happens when you use typical DriverManager way of getting the connection), but instead the process waits until a connection checkout exception is thrown
java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:77)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:690)
....
Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool#20014b8 -- timeout at awaitAvailable()
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1467)
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:644)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:554)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:758)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:685)
... 66 more
How can I identify that there is a invalid credential issue with c3p0?

Your best way to validate provided credentials/JDBC params is to avoid connection pool at all.
Open dedicated connection just for this purpose and try to execute simplest SQL against new connection (eg SELECT 1 or similar).
After success, you can pass them to C3P0 otherwise propagate error back to user.

JDBC providers are free to create whatever error/exception messages they want. So you need to be ready to parse the error message of each provider in order to make sense of what is happening.
You can also try to get information from exception types if the JDBC provider segregates errors in separate types.
As a side note, giving too much information regarding why the connection failed may be considered a security breach. So one should not expect the JDBC driver to give you such information. For instance, why would any database collaborate with invasion attempts by saying "the username is correct, but the password is not."?

Creating HBaseAdmin which connects to HBaseTestingUtility

I'm writing a code which manipulates data stored in HBase. I want to write also a test for this code. I want to use HBaseTestingUtility in my test, hence, in my #BeforeClass I create new instance of HBaseTestingUtility and I start the mini cluster:
#BeforeClass
public static void setUpClass() throws Exception {
utility = new HBaseTestingUtility();
utility.startMiniCluster();
}
It works good. However, I cannot connect to this embedded cluster in my code which is being tested. In the code I have:
Configuration config = HBaseConfiguration.create();
try (HBaseAdmin admin = new HBaseAdmin(config))
{
//code which manipulates the data
}
Unfortunately when new HBaseAdmin is created I'm getting a ConnectionError exception:
2013-11-21 11:20:35,778 WARN [main-SendThread(0:0:0:0:0:0:0:1:2181)] zookeeper.ClientCnxn (ClientCnxn.java:run(1089)) - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused: no further information
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:692)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)
When I try another apporach to create HBaseAdmin:
try (HBaseAdmin admin = new HBaseAdmin(HBaseCacheTest.utility.getConfiguration()))
{
//code which manipulates the data
}
it works (note that here I'm accessing the instance of HBaseTestingUtility via HBaseCacheTest.utility).
Obviously this is not a good approach as I don't want to have a production code which depends on the testing code.
One approach I see to work here is to make it possible in my production class to set the Configuration and use this setter method in my tests.
However, I believe that there should be another way to connect to the embeded mini cluster created with HBaseTestingUtility.
Any ideas?

You should not create a new Configuration object, but use the one provided by HBaseTestingUtility:
HBaseAdmin admin = testingUtility.getHBaseAdmin();
Also, if you need configuration only you can use this one:
testingUtility.getConfiguration()
Just rechecked it in my UT. I'm using HBase 0.96-hadoop2
Hope this helps :)

Java - Check if an SqlSessionFactory is valid

I generate an SqlSessionFactory from an SqlSessionFactoryBean, and catch exceptions to determine if it successfully created for a given data-source.
However, I have found that method fails if the database exists, but has no listener. No exception is generated and an exception only occurs later when I actually try create an open session of the SqlSessionFactory.
What's the best way for me to check if I am working with a valid database, accepting normal sessions?
Edit: It doesn't actually appear to be that opening a session throws the exception ... it may only happen at my first actual update/retrieve call.

Many connection pools have a connection validation query option, which can be configured to execute something simple like SELECT 1 (depends on the database, of course) to validate the connection is valid. It's the same premise, though: attempt to execute the query and catch the exception.
If you are already using a connection pool, and it supports such an option, I wonder if this would solve your problem.