Jdbc Driver Creates New Thread For Each Statement With A Query Timeout Set
Jun 20, 2007
I am profiling a web application that is using the Microsoft JDBC driver, version 1.1 to connect to a sql server 2005 database. Each java.sql.Statement that is created, within the application, gets a query timeout value set on it ( statement.setQueryTimeout(...) ).
I have discovered that the JDBC driver creates a new thread to monitor each Statement and the query timeout value. When the application is under load these threads are getting created faster then they are being destroyed and I am concerned that this will cause a performance problem in production.
One option I have is to remove the query timeout value and the monitor threads will not be created, another is to change JDBC drivers.
I'm curious is there any way to control this behavior so that these threads are not created or are managed more efficiently. Is there a workaround that anyone is aware of? Is this considered a bug?
I have found a similar bug here for the 2000 driver:
http://support.microsoft.com/default.aspx/kb/894552
I use the Microsoft SQL Server 2005 JDBC Driver (1.0.809.102 and 1.1.1320.0) to connect to a SQL Server 2005 database. I'm currently implementing a generic data access layer that executes an arbitrary SQL statement:
public void prepareQuery(String sql) throws SQLException, ClassNotFoundException { PreparedStatement stm = getConnection().prepareStatement(sql); ParameterMetaData pmd = stm.getParameterMetaData(); int numPar = pmd.getParameterCount(); System.out.println("Number of parameters: " + numPar); // ... acquire and process 'numPar' parameters ... }
Exemplarily, I created a table named 'TEST_TABLE' with three Integer columns ('C1', 'C2' and 'C3') and a Varchar column ('C4'). Calling
This is definitely wrong because that statement has only two parameters, one of type Integer and one of type Varchar. How can I get the correct number and types of the parameters?
I have read similar posts to this, but I am still having problems.
I am trying to use connection pooling to connect to a local SQL Server 2005 database. I am running my application using MyEclipse Enterprise Workbench. I have verified that sqljdbc.jar resides in "WebRoot/WEB-INF/lib/"
Ive got a collection of view which piece together data from varying sources and assemble it ready for a stored procedure to squirt the data into a table.
This has worked fine up til yesterday when i had to amend one of the views to include a reference to another data set.
Essentially the data is for students and comes from our old db and our new one, each year group has different values so the views act to extract all data relevant for a child from both databases and accross all year data sets.
The problem im having is that i can get the final stored procedure to run. It ran fine the other day but since ive amended one of the views i get timeout errors wherever it's run. real problem when query analyser which has no timeout settings (apparently) times out as it means i cant run the query anywhere....enterprise manager will timeout after 30secs despite amending the query timeout setting to 600s.
so im a bit stuck, both views which the problem view is trying to combine run in under 30 seconds...when you try and combine them it times out- seems to run for a long long time.
note sure why this has started happening, from all ive read most peeps get this with EM and solve it using QA. but what if QA cant handle the query either?
heres the sql: (wont make much sense but hopefully shows that its not a complex query)
SELECT TOP 100 PERCENT dbo.StudentDetMaster.SetId, dbo.StudentDetMaster.StudentId, dbo.StudentDetMaster.Name, dbo.StudentDetMaster.CourseYear, dbo.StudentDetMaster.House, dbo.StudentDetMaster.Tutor, dbo.PGJSProfile.[Key Stage 1 Reading], dbo.PGJSProfile.[Key Stage 1 Writing], dbo.PGJSProfile.[Key Stage 1 Speaking & Listening], dbo.PGJSProfile.[Key Stage 1 Maths], dbo.PGJSProfile.[Key Stage 2 English], dbo.PGJSProfile.[Key Stage 2 Maths], dbo.PGJSProfile.[Key Stage 2 Science], dbo.PGJSProfile.[Verbal Reasoning Year 3], dbo.PGJSProfile.[Year 3 English Autumn], dbo.PGJSProfile.[Year 3 English Year Group Average], dbo.PGJSProfile.[Year 3 English Summer], dbo.PGJSProfile.[Year 3 English Year Group Average Score], dbo.PGJSProfile.[Year 3 Maths Autumn], dbo.PGJSProfile.[Year 3 Maths Year Group Average], dbo.PGJSProfile.[Year 3 Maths Summer], dbo.PGJSProfile.[Year 3 Maths Year Group Average Score], dbo.StudentDetMaster.[Year 3 Maths Set], dbo.PGJSProfile.[Verbal Reasoning Year 4], dbo.PGJSProfile.[Year 4 English Autumn], dbo.PGJSProfile.[Year 4 English Year Group Average], dbo.PGJSProfile.[Year 4 English Summer], dbo.PGJSProfile.[Year 4 English Year Group Average Score], dbo.PGJSProfile.[Year 4 Maths Autumn], dbo.PGJSProfile.[Year 4 Maths Year Group Average], dbo.PGJSProfile.[Year 4 Maths Summer], dbo.PGJSProfile.[Year 4 Maths Year Group Average Score], dbo.StudentDetMaster.[Year 4 Maths Set], dbo.PGJSProfile.[Verbal Reasoning Year 5], dbo.PGJSProfile.[Year 5 English Autumn], dbo.PGJSProfile.[Year 5 English Year Group Average], dbo.PGJSProfile.[Year 5 English Summer], dbo.PGJSProfile.[Year 5 English Year Group Average Score], dbo.PGJSProfile.[Year 5 Maths Autumn], dbo.PGJSProfile.[Year 5 Maths Year Group Average], dbo.PGJSProfile.[Year 5 Maths Summer], dbo.PGJSProfile.[Year 5 Maths Year Group Average Score], dbo.StudentDetMaster.[Year 5 Maths Set], dbo.PGJSProfile.[Verbal Reasoning Year 6], dbo.PGJSProfile.[Year 6 English Autumn], dbo.PGJSProfile.[Year 6 English Year Group Average], dbo.PGJSProfile.[Year 6 English Year Group Average Score], dbo.PGJSProfile.[Year 6 Maths Autumn], dbo.StudentDetMaster.[Year 6 Maths Set], dbo.StudentDetMaster.[JS Baseline], dbo.PGJSProfile.[Year 6 English Mock], dbo.PGJSProfile.[Year 6 Maths Mock], dbo.PGJSProfile.[Year 6 English Mock Year Group Average], dbo.PGJSProfile.[Year 6 Maths Mock Year Group Average] FROM dbo.PGJSProfile LEFT OUTER JOIN dbo.StudentDetMaster ON dbo.PGJSProfile.SetId = dbo.StudentDetMaster.SetId AND dbo.PGJSProfile.StudentId = dbo.StudentDetMaster.StudentId ORDER BY dbo.StudentDetMaster.Name
Hi,Could some please tell me whether Microsoft provides Type 2 and Type 4jdbc driver ? For Type 4 MS providescom.microsoft.jdbc.sqlserver.SQLServerDriver driver. What is thecofiguration required for type 2 driver and what driver class filesrequired ?Its very urgent to me please reply.Ajay
Hi I just downloaded the Microsoft JDBC Driver for SQL Server 2000. Now it tells me SQL Server 7 is not supported. :o I already checked the JDBC Driver list on suns site. Its quite long and only states MS SQL Server without any version number. Can you recommend a particular driver? Preferrably without any cost. :D Or am I better of with the jdbc/odbc bridge?
Hello all,I have a question about the SQL Server JDBC driver. I was wondering ifanyone knows what the default prefetch size is (in number of rows).Also, does anyone know if an entire packet is sent (i.e. padded withnull values) if there is not enough data to fill it?Thanks for your help!ty
what is the jdbc driver for sql express? is it "sqljdbc"? then what is its "complete" name in the class path:"com.microsoft.sqlexpress.sqljdbc"? and for the conection url is it "jdbc:microsoft:sqlexpress://localhost/sqlexpress"?
Hi at all, i'm new here, your communitiy seems too much preparated. My question is simple... i must to connect via jdbc to a ms sql server 2000 database, but i'm in doubt to select which jdbc driver to use. your suggest over microsoft'drivers? i found on the internet the open source drivers jdts...what about them?
I appear to have an issue here with WebLogic and SQL Server. The WebLogic server is set up to create a pool of connections (max 15, min 4) to the SQL server. The idea is that connections are "leased" to the application for the duration of a transaction and then returned to the pool at the end of the lease. The pool can grow to up to 15 simultaneous connections -- after that the applications must wait for the next available connection in the pool.
As activity subsides, connections are supposed to be dropped down to the minimum number of 4 connections (which are maintained open continuously).
The problem that I can see from SQL is that there are tens of connections that are open (should not be more than 15, right?) and some of these connections have been held open for several days (going back to the last time we rebooted the server 2 weeks ago). I am told that this is a relatively new phenomenon; new within the last 3 months, anyway. I have tried killing some of these processes manually and now they show up in "Current Activity" as being in a "Killed/Rollback" state.
Does anyone have any experience with JDBC/Weblogic and SQL? Any experiences similar to this?
More information: SQL Server: SQL Server 2000 (SP3) Windows NT (SP6)
I'm using Borland's ProcedureDataSet to retrieve data from a SQL 2005 database using the JDBC 1.2 Driver. My problem is with the money data type. The Borland's component translate money into BigDecimal and if the value in the database in NULL then I get a NullPointerException.
On MSDN I saw money was referred as Double which is wrong! Any Ideas?
I used SQLServerDatabaseMetaData (which requires a connection to return this data which seems unnecessary) to get:
name: Microsoft SQL Server 2005 JDBC Driver version: 1.1.1501.101 Passing a url of: jdbc:sqlserver://localhost:1433;DatabaseName=Northwind;IntegratedSecurity=true
I get the error: Oct 7, 2006 3:46:09 PM com.microsoft.sqlserver.jdbc.AuthenticationJNI <clinit> WARNING: Failed to load the sqljdbc_auth.dll Exception in thread "main" com.microsoft.sqlserver.jdbc.SQLServerException: This driver is not configured for integrated authentication.
I copied over x86sqljdbc_auth.dll and then it worked. I assume this is required with the jar file. This leads to a couple of questions:
What are the files xax86sqljdbc_xa.dll & x64 files for? Are they needed? The jar file can just travel with my java code. Should the dll do the same or does it need to be in the path and/or the default directory? Are there any other files needed or just these two?
We are deploying our application with the v1.1 JDBC driver, but are getting a little worried with some of the results of our recent stress tests. I wanted to see if anyone could offer any insight into this problem. Also, do you have any expectation for a release date for the 1.2 driver (not CTP).
Under heavy load with a number of concurrent processes loading to a few tables in our database through batched INSERT statements (called executeBatch against a prepared statement), we see these exceptions coming back from the driver:
com.vectorsgi.tw.services.exception.LoaderException: java.lang.NullPointerException at com.vectorsgi.tw.loader.X937HibernateLoader.loadToDatabase(X937HibernateLoader.java:813) at com.vectorsgi.tw.loader.X937HibernateLoader.loadToDatabase(X937HibernateLoader.java:482) at com.vectorsgi.tw.loader.X937HibernateLoader.loadToDatabase(X937HibernateLoader.java:466) at com.vectorsgi.viex.workflow.capture.LoadListener.execute(LoadListener.java:91) at com.vectorsgi.viex.workflow.capture.LoadListener.actionFired(LoadListener.java:55) at fluximpl.JavaActionImpl.execute(JavaActionImpl.java:6) at fluximpl.gl.a(gl.java:348) at fluximpl.gl.b(gl.java:417) at fluximpl.gl.a(gl.java:236) at fluximpl.dm.d(dm.java:58) at fluximpl.tlb.run(tlb.java:10) Caused by: java.lang.NullPointerException at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecuteBatchPreparedStatement(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PreparedStatementBatchExecutionRequest.executeStatement(Unknown Source) at com.microsoft.sqlserver.jdbc.CancelableRequest.execute(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeRequest(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeBatch(Unknown Source) at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723) at com.vectorsgi.tw.loader.X937HibernateLoader.loadItems(X937HibernateLoader.java:1326) at com.vectorsgi.tw.loader.X937HibernateLoader.loadToDatabase(X937HibernateLoader.java:637) ... 10 more
In a test of 20 "jobs" 2 failed with this error, so its certainly not frequent, but not fleeting either. What is also strange about this is that after the two failures (not immediately back to back but within a few minutes of each other) we got a primary key constraint error:
com.vectorsgi.tw.services.exception.LoaderException: java.sql.BatchUpdateException: com.microsoft.sqlserver.jdbc.SQLServerException: Violation of PRIMARY KEY constraint 'PK__X937_ITEM__0E7B75BC'. Cannot insert duplicate key in object 'X937_ITEM'. at com.vectorsgi.tw.loader.X937HibernateLoader.loadToDatabase(X937HibernateLoader.java:813) at com.vectorsgi.tw.loader.X937HibernateLoader.loadToDatabase(X937HibernateLoader.java:482) at com.vectorsgi.tw.loader.X937HibernateLoader.loadToDatabase(X937HibernateLoader.java:466) at com.vectorsgi.viex.workflow.capture.LoadListener.execute(LoadListener.java:91) at com.vectorsgi.viex.workflow.capture.LoadListener.actionFired(LoadListener.java:55) at fluximpl.JavaActionImpl.execute(JavaActionImpl.java:6) at fluximpl.gl.a(gl.java:348) at fluximpl.gl.b(gl.java:417) at fluximpl.gl.a(gl.java:236) at fluximpl.dm.d(dm.java:58) at fluximpl.tlb.run(tlb.java:10) Caused by: java.sql.BatchUpdateException: com.microsoft.sqlserver.jdbc.SQLServerException: Violation of PRIMARY KEY constraint 'PK__X937_ITEM__0E7B75BC'. Cannot insert duplicate key in object 'X937_ITEM'. at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeBatch(Unknown Source) at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723) at com.vectorsgi.tw.loader.X937HibernateLoader.loadItems(X937HibernateLoader.java:1333) at com.vectorsgi.tw.loader.X937HibernateLoader.loadToDatabase(X937HibernateLoader.java:637) ... 10 more
Now- I realize that this is very straight forward, but we are almost certain that our key generation code cannot generate a duplicate key. We have been running it 24x7 for three years at a number of customer sites without ever getting a duplicate (under the open-source jTDS driver). Now that we are trying to move to a better driver that is actively supported, we see these primary key violations every once in a while. Its very hard to consistently replicate, but we have received it from 5 of the past 20 stress tests.
I mainly want insight into the NullPointerException, but if there is any possibility that a driver issue could be contributing to my primary key problem--that would sure make a lot of sense. (I realize its a long shot!)
Hi; I am having problem figuring out if the JDBC Driver for MS SQL Server 2005 is faster or setting up a data source from Administrative tools/Data Sources. I have run several tests and in all tests, the odbc datasource is faster. In that case, why having the trouble of downloading a driver if I am not wrong. I have understood that the native driver is always faster than the odbc bridge. Thanks in advance
Hi all, I am building a program using Java and SQL express and I need the driver in order to connect to the database. I have downloaded I think a version for sql server 2005 but it did not work. Can somebody tell me if such driver exists?
I'm trying to debug some deadlock problems I'm having with an XA JDBC application that uses the Microsoft JDBC driver.
Problem is, I can't see much of the info in the Profiler I always get the TextData colum filled with things such as : 'sp_cursorclose 180150269' for my BatchCompleted. I've tried other event but I can't see any of the SQL code. My other application does not use XA and I see the statements fine.
I was wondering how I could get to see the TextData with the SQL sent to the server via the XA connection if it's possible. Is it another event or column I need?
hi, i am using sqljdbc.jar in a java applet and i am using Netbeans for development. i am able to connect with the SQL Server from the IDE. however, when i try to debug the SQL part of the code, i am getting an exception at :
where it says that it cannot find the class. i am also putting down the exception information.
java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.javaws.Launcher.executeApplication(Launcher.java:1273) at com.sun.javaws.Launcher.executeMainClass(Launcher.java:1219) at com.sun.javaws.Launcher.doLaunchApp(Launcher.java:1066) at com.sun.javaws.Launcher.run(Launcher.java:105) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.NoClassDefFoundError: com/microsoft/sqlserver/jdbc/SQLServerDriver at VncViewer.performSql(VncViewer.java:115) at VncViewer.readParameters(VncViewer.java:743) at VncViewer.init(VncViewer.java:152) at VncViewer.main(VncViewer.java:53) ... 9 more Caused by: java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at com.sun.jnlp.JNLPClassLoader.findClass(JNLPClassLoader.java:256) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
i am currently using java web start to debug the application. earlier, the application was running smoothly during debug (when not being run through java web start), but was failing to run when started externally say within a html file as an applet. however, when i used java web start, the exception is being pointed to the line in bold. i have added sqljdbc.jar to the list of libraries and have added it under the compile as well as the run time configuration. i would appreciate if this exception could be resolved. if i have to configure anything in the classpath, pls suggest how i can configure it under netbeans.
We are in need of a JDBC driver (version 3) to support some autonumbering in SQLServer. We've found a couple, very expensive stuff (JTurbo & DataDirect), these drivers can be more expensive than a SQLServer license. Any other ideas/sources?
Hello JoeOver the past several years, I have found your responses to jdbcusage/driver related issues to be extremely helpful. I am sure thatyou're very busy so I will make my question as brief as possible - thereason I didn't post this to a newsgroup is that I don't want to hearany more hype or links to benchmarks (since the vast majority of thebenchmarks don't test concurent/mixed-transaction environments). (I amalso posting a modified version of this message to some newsgroups, butbased on past responses - don't have too much hope that these will leadto a resolution.) If the only way to answer this question would be tohave a phone conversation, my company would be more than happy to pay aconsulting-service fee for your time.My situation:My company has a enterprise level web-app that targets SQL Server. Wedon't use J2EE - so we stick to a simple to administer web containers(JRun,Tomcat). Recently, we have been getting worse and worseperformance from our jdbc driver (we use the free MS jdbc driver) -things like strange transaction resource handling, chopy overallperformance, etc.. I have spent significant time tweaking it (followingvarious advice - many times yours - on newgroups... I can go intodetails, but I don't want to take up your time). As the project'sarchitect, I need to do something about this problem - but varioushigh-level tunnings that I have done to the way we use connections withthis driver haven't significantly improved perfomance under normaleveryday load. (Our queries often span tables with millions of records,and are relatively dynamic. We use a seperate pool of autocommit-offconnections for writes, and autocommit-on connecions for reads)So, then, my question - in your expert opinion - what is the BESTdriver from SQL Server 2000 given the following needs:Things I need it to have are solid jdbc 1.0, solid transactionhandling, decent concurrent load handling, stable implementation ofresource handling (i.e. auto closing result sets when parent statementsclose, closing of result sets & statements when connections close) andsupport for multiple open statements/result sets per connection.Things I do not have a direct need for:Connection Pooling (I keep my own pool of open connections), DataSourcesupport, distributed transactions or 2-phase commit support, RowSetvariants, jdbc 3.0 autokey generation, J2EE compliance. We do make useof updatable result sets - but I don't care if it isn't supported sinceI can still use MS driver for those, as they are mainly done it batchjobs).Things that are nice:It would also be good to have a driver that can handle prep statementcaching on a driver level (vs connection level) although this isn't anecessity, and if it is available - it would need to have aconfigurable caching strategy (or have a way to be turned off :)I very much appreciate your help in advanceThanksGary BogachkovSystem ArchitectStericycle Direct Return
Dear All,I developed an web application which use MS SQL Server 2000. Iencounter the following SQLException "[Microsoft][SQLServer 2000Driver for JDBC]Error setting up static cursor cache". Did anyoneencounter this problem before? What does this exception mean and howto solve this problem?[Remarks: The web application work properly on development machine andthis machine but encounter this exception when move to anothermachine, so is this exception related to the machine?]Thank you for your attention.Yours faithfully,Benny
We currently have a SQL 2005 database with Thai Collation (Thai_CI_AI). When we try using Microsoft's JDBC SQL Server driver to connect to the database, we get a "SQLException: Codepage 874 is not supported by the Java environment." error.
We're currently using this code to connect:
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); con = DriverManager.getConnection( "jdbc: sqlserver://x.x.x.x;databasename=xyz;" + "user=xxx;password=xxx"
I'm trying to figure out if the SQL Server 2005 JDBC driver supports SSL at all. I've downloaded the driver documentation, looked at more web pages than I care to count, and even went as far as to take a stab at guessing at different driver property names in the hopes I might discover some undocumented feature. Each time I try, I come up dry.
The following exception shows up in my JBoss log:
2007-01-03 12:13:36,812 WARN [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] Throwable while attempting to get a new connection: null org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (com.microsoft.sqlserver.jdbc.SQLServerException: The SQL Server login requires an SSL connection.)
I know I have things working properly on the SQL Server side, as both osql and Query Analyzer work fine, and packet sniffing yields no plain text information. I've also tried swapping in the open source JTDS driver, and once again, sniffing shows that the data between the two machines in encrypted.
Does anyone know if I'm just missing something completely obvious, or can someone state with absolute certainty that the driver does not support SSL? Any ideas on how to find out if there are plans to support this feature and what the timeline might be?
i just downloaded the latest version of the drver v 1.2 am using Eclipse latest version along with Microsoft SQL Server 2005 with Express Mangment Tools i installed the driver (copied the .dll to C:windowssystem32 ad included the .jar file in my project) am using mixed mode authentication
when i use the following url: "jdbcqlserver://localhost:1433;user=sa;password=;integratedSecurity=true;"; it connects to the master DB... good
whe i use the following: "jdbcqlserver://localhost:1433;user=sa;password=;database=MyHits;integratedSecurity=true;"; it gives me the follwoing:
com.microsoft.sqlserver.jdbc.SQLServerException: Cannot open database "MyHits" requested by the login. The login failed. at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(Unknown Source) at com.microsoft.sqlserver.jdbc.TDSTokenHandler.onEOF(Unknown Source) at com.microsoft.sqlserver.jdbc.TDSParser.parse(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection.sendLogon(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection.logon(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection.access$000(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection$LogonCommand.doExecute(Unknown Source) at com.microsoft.sqlserver.jdbc.TDSCommand.execute(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection.loginWithoutFailover(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(Unknown Source) at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at db_worker.<init>(db_worker.java:25) at runner.main(runner.java:10)
although am sure i didnt miss anything (enbaled tcp/ip, no special permission thing on the DB MyHits) etc..
note: the databaseName ield in the url only works when i set it = to master,else it wont work (northwind or whatever) wont work!!!
