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From Abraham Elmahrek <...@cloudera.com>
Subject Re: Connection refused while Job Submission - Sqoop Client API
Date Tue, 24 Sep 2013 08:15:21 GMT
Manish,

In a previous message, you had said that you had given the Sqoop 2 server
access to the database (remote access). It seems like you're going to have
to give remote access to the nodes hosting the TaskTrackers and JobTracker
for this to work. The error message you're seeing pops up during
initialization of the Sqoop job or execution of the MapReduce job.

Also, you might want to be sure that the Sqoop server can communicate with
your database. If I remember right, connections can be created regardless
of their ability to connect to the server. The difference is that the
status will return ACCEPTABLE versus FINE (If memory serves right).

-Abe


On Tue, Sep 24, 2013 at 12:12 AM, Manish Meshram
<manishmeshram36@gmail.com>wrote:

> Hi Abraham,
>
>    Can you tell me how to give mapreduce cluster access to database.
>    I guess I haven't given it.
>
> Thanks,
>    Manish
>
>
> On Tue, Sep 24, 2013 at 11:54 AM, Abraham Elmahrek <abe@cloudera.com>wrote:
>
>> Manish,
>>
>> Have you given your mapreduce cluster access to your database? it will be
>> using the credentials in the Connection you created to distribute the
>> process of importing into HDFS.
>>
>> -Abe
>>
>>
>> On Mon, Sep 23, 2013 at 10:52 PM, Manish Meshram <
>> manishmeshram36@gmail.com> wrote:
>>
>>> Hi Abraham,
>>>
>>> That is another problem,I cannot use the commands you said because when
>>> I start client on the same machine(centOS-remote for me) on which server is
>>> running, the server automatically stops.
>>> But when I started the server on centOS(which is remote for me and I am
>>> accessing it through putty)
>>> and I have a sqoop Client API java program in my system(windows 7).
>>> It does not stops the server and my connection established successfully.
>>> Also MySQL server is installed on my system(windows 7) and I have given
>>> remote access to ip address of CentOS system,
>>> that is why my connection get established in 1st step.
>>> I am attaching the source and the output I am getting, please have a
>>> look.
>>>
>>> *Program:*
>>> *
>>> *
>>> public class TestSqoopClient {
>>>  private static void printMessage(List<MForm> formList) {
>>>   for(MForm form : formList) {
>>>     List<MInput<?>> inputlist = form.getInputs();
>>>     if (form.getValidationMessage() != null) {
>>>       System.out.println("Form message: " +
>>> form.getValidationMessage());
>>>     }
>>>     for (MInput minput : inputlist) {
>>>       if (minput.getValidationStatus() == Status.ACCEPTABLE) {
>>>         System.out.println("Warning:" + minput.getValidationMessage());
>>>       } else if (minput.getValidationStatus() == Status.UNACCEPTABLE) {
>>>         System.out.println("Error:" + minput.getValidationMessage());
>>>       }
>>>     }
>>>   }
>>> }
>>>
>>> public static void main(String[] args) {
>>>  try
>>>  {
>>> String url = "http://192.168.3.156:12000/sqoop/";
>>>  SqoopClient client = new SqoopClient(url);
>>>   /*********Connection**********/
>>> //Dummy connection object
>>> MConnection newCon = client.newConnection(1);
>>>
>>> //Get connection and framework forms. Set name for connection
>>> MConnectionForms conForms = newCon.getConnectorPart();
>>>  MConnectionForms frameworkForms = newCon.getFrameworkPart();
>>> newCon.setName("MyConnection");
>>>   /*sample for below code
>>>  * MStringInput m =
>>> conForms.getStringInput("connection.connectionString");
>>>  m.setValue("");*/
>>>  //Set connection forms values
>>>
>>> conForms.getStringInput("connection.connectionString").setValue("jdbc:mysql://
>>> 10.10.10.103:3306/mydb");
>>>
>>> conForms.getStringInput("connection.jdbcDriver").setValue("com.mysql.jdbc.Driver");
>>> conForms.getStringInput("connection.username").setValue("********");
>>>  conForms.getStringInput("connection.password").setValue("********");
>>> //I masked it.
>>>
>>> frameworkForms.getIntegerInput("security.maxConnections").setValue(0);
>>>
>>> Status status  = client.createConnection(newCon);
>>> if(status.canProceed()) {
>>>  System.out.println("Created. New Connection ID : "
>>> +newCon.getPersistenceId());
>>>  } else {
>>>  System.out.println("Check for status and forms error ");
>>> }
>>>  //for checking the errors/warnings
>>> printMessage(newCon.getConnectorPart().getForms());
>>>  printMessage(newCon.getFrameworkPart().getForms());
>>>   /*********Job**********/
>>> //Creating dummy job object
>>> MJob newjob = client.newJob(1, org.apache.sqoop.model.MJob.Type.IMPORT);
>>>  MJobForms connectorForm = newjob.getConnectorPart();
>>> MJobForms frameworkForm = newjob.getFrameworkPart();
>>>  newjob.setName("ImportJob");
>>> //Database configuration
>>>  connectorForm.getStringInput("table.schemaName").setValue("");
>>>  //Input either table name or sql
>>>  connectorForm.getStringInput("table.tableName").setValue("student");
>>> //connectorForm.getStringInput("table.sql").setValue("select id,name
>>> from student");
>>>  connectorForm.getStringInput("table.columns").setValue("id,name");
>>> connectorForm.getStringInput("table.partitionColumn").setValue("id");
>>>  //Set boundary value only if required
>>> //connectorForm.getStringInput("table.boundaryQuery").setValue("");
>>>
>>> //Output configurations
>>> frameworkForm.getEnumInput("output.storageType").setValue("HDFS");
>>>  frameworkForm.getEnumInput("output.outputFormat").setValue("TEXT_FILE");//Other
>>> option: SEQUENCE_FILE/TEXT_FILE
>>>
>>> frameworkForm.getStringInput("output.outputDirectory").setValue("/home/hadoop/tmp/hdfs/data");
>>>
>>> //Job resources
>>> frameworkForm.getIntegerInput("throttling.extractors").setValue(1);
>>>  frameworkForm.getIntegerInput("throttling.loaders").setValue(1);
>>>
>>> Status status1 = client.createJob(newjob);
>>>  if(status1.canProceed()) {
>>>  System.out.println("New Job ID: "+ newjob.getPersistenceId());
>>>  } else {
>>>  System.out.println("Check for status and forms error ");
>>> }
>>>  printMessage(newjob.getConnectorPart().getForms());
>>> printMessage(newjob.getFrameworkPart().getForms());
>>>   /*****Job Submission******/
>>> //Job submission start
>>>  long jid = newjob.getPersistenceId();
>>> System.out.println(jid);
>>>  MSubmission submission = client.startSubmission(jid);
>>>  System.out.println("Status : " + submission.getStatus());
>>>  if(submission.getStatus().isRunning() && submission.getProgress() !=
>>> -1) {
>>>   System.out.println("Progress : " + String.format("%.2f %%",
>>> submission.getProgress() * 100));
>>>  }
>>>  System.out.println("Hadoop job id :" + submission.getExternalId());
>>>  System.out.println("Job link : " + submission.getExternalLink());
>>>  Counters counters = submission.getCounters();
>>>  if(counters != null) {
>>>   System.out.println("Counters:");
>>>   for(CounterGroup group : counters) {
>>>     System.out.print("\t");
>>>     System.out.println(group.getName());
>>>     for(Counter counter : group) {
>>>       System.out.print("\t\t");
>>>       System.out.print(counter.getName());
>>>       System.out.print(": ");
>>>       System.out.println(counter.getValue());
>>>     }
>>>   }
>>> }
>>> if(submission.getExceptionInfo() != null) {
>>>   System.out.println("Exception info : "
>>> +submission.getExceptionInfo());
>>> }
>>>
>>>
>>> //Check job status
>>> MSubmission submission1 = client.getSubmissionStatus(1);
>>> if(submission1.getStatus().isRunning() && submission1.getProgress() !=
>>> -1) {
>>>   System.out.println("Progress : " + String.format("%.2f %%",
>>> submission.getProgress() * 100));
>>> }
>>>
>>> //Stop a running job
>>> //submission1.stopSubmission(jid);
>>>
>>> }
>>>  catch(Exception e)
>>> {
>>> e.printStackTrace();
>>>  }
>>>  }
>>> }
>>>
>>>
>>>
>>> *Output:*
>>>
>>> Created. New Connection ID : 33
>>> New Job ID: 11
>>> 11
>>> org.apache.sqoop.common.SqoopException: CLIENT_0006:Server has returned
>>> exception
>>>  at
>>> org.apache.sqoop.client.request.Request$ServerExceptionFilter.handle(Request.java:102)
>>> at com.sun.jersey.api.client.WebResource.handle(WebResource.java:670)
>>>  at
>>> com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74)
>>> at
>>> com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:563)
>>>  at org.apache.sqoop.client.request.Request.post(Request.java:66)
>>> at
>>> org.apache.sqoop.client.request.SubmissionRequest.create(SubmissionRequest.java:46)
>>>  at
>>> org.apache.sqoop.client.request.SqoopRequests.createSubmission(SqoopRequests.java:134)
>>> at
>>> org.apache.sqoop.client.SqoopClient.startSubmission(SqoopClient.java:353)
>>>  at com.TestSqoopClient.main(TestSqoopClient.java:126)
>>> Caused by: java.lang.Throwable: GENERIC_JDBC_CONNECTOR_0001:Unable to
>>> get a connection
>>> at
>>> org.apache.sqoop.connector.jdbc.GenericJdbcExecutor.<init>(GenericJdbcExecutor.java:47)
>>>  at
>>> org.apache.sqoop.connector.jdbc.GenericJdbcImportInitializer.configureJdbcProperties(GenericJdbcImportInitializer.java:73)
>>> at
>>> org.apache.sqoop.connector.jdbc.GenericJdbcImportInitializer.initialize(GenericJdbcImportInitializer.java:46)
>>>  at
>>> org.apache.sqoop.connector.jdbc.GenericJdbcImportInitializer.initialize(GenericJdbcImportInitializer.java:37)
>>> at
>>> org.apache.sqoop.framework.FrameworkManager.submit(FrameworkManager.java:434)
>>>  at
>>> org.apache.sqoop.handler.SubmissionRequestHandler.submissionSubmit(SubmissionRequestHandler.java:112)
>>> at
>>> org.apache.sqoop.handler.SubmissionRequestHandler.handleActionEvent(SubmissionRequestHandler.java:98)
>>>  at
>>> org.apache.sqoop.handler.SubmissionRequestHandler.handleEvent(SubmissionRequestHandler.java:68)
>>> at
>>> org.apache.sqoop.server.v1.SubmissionServlet.handlePostRequest(SubmissionServlet.java:44)
>>>  at
>>> org.apache.sqoop.server.SqoopProtocolServlet.doPost(SqoopProtocolServlet.java:63)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>>>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>>>  at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>>> at
>>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>>>  at
>>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>>> at
>>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>>>  at
>>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
>>> at
>>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>>>  at
>>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
>>> at
>>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
>>>  at
>>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
>>> at
>>> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
>>>  at java.lang.Thread.run(Thread.java:724)
>>> Caused by: java.lang.Throwable: Communications link failure
>>>
>>> The last packet sent successfully to the server was 0 milliseconds ago.
>>> The driver has not received any packets from the server.
>>>  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>>> Method)
>>> at
>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
>>>  at
>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>>> at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
>>>  at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
>>> at
>>> com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
>>>  at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:355)
>>> at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2479)
>>>  at
>>> com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2516)
>>> at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2301)
>>>  at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834)
>>> at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
>>>  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>>> Method)
>>> at
>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
>>>  at
>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>>> at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
>>>  at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
>>> at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416)
>>>  at
>>> com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:317)
>>> at java.sql.DriverManager.getConnection(DriverManager.java:571)
>>>  at java.sql.DriverManager.getConnection(DriverManager.java:215)
>>> at
>>> org.apache.sqoop.connector.jdbc.GenericJdbcExecutor.<init>(GenericJdbcExecutor.java:40)
>>>  ... 23 more
>>> Caused by: java.net.ConnectException: Connection refused
>>> at java.net.PlainSocketImpl.socketConnect(Native Method)
>>>  at
>>> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
>>> at
>>> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
>>>  at
>>> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
>>> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
>>>  at java.net.Socket.connect(Socket.java:579)
>>> at java.net.Socket.connect(Socket.java:528)
>>> at java.net.Socket.<init>(Socket.java:425)
>>>  at java.net.Socket.<init>(Socket.java:241)
>>> at
>>> com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259)
>>>  at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:305)
>>> ... 38 more
>>>
>>>
>>>  Thanks,
>>>
>>>        Manish
>>>
>>>
>>> On Mon, Sep 23, 2013 at 11:11 PM, Abraham Elmahrek <abe@cloudera.com>wrote:
>>>
>>>> Hey Manish,
>>>>
>>>> It looks like your job is using a connection that is pointing to a
>>>> database server that is down or doesn't exist. Could you validate your
>>>> connection parameters and verify you're using the correct connection in the
>>>> job? Please provide the job and connection details via the "show
>>>> connection" and "show job" commands. That will definitely assist us in
>>>> figuring out what went wrong in your setup.
>>>>
>>>> -Abe
>>>>
>>>>
>>>> On Mon, Sep 23, 2013 at 3:45 AM, Manish Meshram <
>>>> manishmeshram36@gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I am using sqoop Client API for importing rdbms data to hdfs.
>>>>> I am using Hadoop 1.2.1(single node)
>>>>> and sqoop 1.99.2
>>>>> Hadoop is remote for me installed on CentOS and I am accessing it
>>>>> through putty.
>>>>>
>>>>> I have gone through Sqoop client API guide -
>>>>> http://sqoop.apache.org/docs/1.99.2/ClientAPI.html
>>>>>
>>>>> As there are 3 steps in total:
>>>>> 1. Create connection.....(done)
>>>>> 2. Create Job..........(done)
>>>>> 3. Submit Job.........(GETTING ERROR)
>>>>>
>>>>> Steps 1 and 2 are working fine for me.
>>>>> But during Step 3 i.e. while submitting the job I am getting the
>>>>> following exception
>>>>> in my eclipse IDE:
>>>>>
>>>>>
>>>>>  org.apache.sqoop.common.SqoopException: CLIENT_0006:Server has
>>>>> returned exception
>>>>> at
>>>>> org.apache.sqoop.client.request.Request$ServerExceptionFilter.handle(Request.java:102)
>>>>>  at com.sun.jersey.api.client.WebResource.handle(WebResource.java:670)
>>>>> at
>>>>> com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74)
>>>>>  at
>>>>> com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:563)
>>>>> at org.apache.sqoop.client.request.Request.post(Request.java:66)
>>>>>  at
>>>>> org.apache.sqoop.client.request.SubmissionRequest.create(SubmissionRequest.java:46)
>>>>> at
>>>>> org.apache.sqoop.client.request.SqoopRequests.createSubmission(SqoopRequests.java:134)
>>>>>  at
>>>>> org.apache.sqoop.client.SqoopClient.startSubmission(SqoopClient.java:353)
>>>>> at com.TestSqoopClient.main(TestSqoopClient.java:126)
>>>>> Caused by: java.lang.Throwable: GENERIC_JDBC_CONNECTOR_0001:Unable to
>>>>> get a connection
>>>>> at
>>>>> org.apache.sqoop.connector.jdbc.GenericJdbcExecutor.<init>(GenericJdbcExecutor.java:47)
>>>>>  at
>>>>> org.apache.sqoop.connector.jdbc.GenericJdbcImportInitializer.configureJdbcProperties(GenericJdbcImportInitializer.java:73)
>>>>> at
>>>>> org.apache.sqoop.connector.jdbc.GenericJdbcImportInitializer.initialize(GenericJdbcImportInitializer.java:46)
>>>>>  at
>>>>> org.apache.sqoop.connector.jdbc.GenericJdbcImportInitializer.initialize(GenericJdbcImportInitializer.java:37)
>>>>> at
>>>>> org.apache.sqoop.framework.FrameworkManager.submit(FrameworkManager.java:434)
>>>>>  at
>>>>> org.apache.sqoop.handler.SubmissionRequestHandler.submissionSubmit(SubmissionRequestHandler.java:112)
>>>>> at
>>>>> org.apache.sqoop.handler.SubmissionRequestHandler.handleActionEvent(SubmissionRequestHandler.java:98)
>>>>>  at
>>>>> org.apache.sqoop.handler.SubmissionRequestHandler.handleEvent(SubmissionRequestHandler.java:68)
>>>>> at
>>>>> org.apache.sqoop.server.v1.SubmissionServlet.handlePostRequest(SubmissionServlet.java:44)
>>>>>  at
>>>>> org.apache.sqoop.server.SqoopProtocolServlet.doPost(SqoopProtocolServlet.java:63)
>>>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>>>>>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>>>>> at
>>>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>>>>>  at
>>>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>>>>> at
>>>>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>>>>>  at
>>>>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>>>>> at
>>>>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>>>>>  at
>>>>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
>>>>> at
>>>>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>>>>>  at
>>>>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
>>>>> at
>>>>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
>>>>>  at
>>>>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
>>>>> at
>>>>> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
>>>>>  at java.lang.Thread.run(Thread.java:724)
>>>>> Caused by: java.lang.Throwable: Communications link failure
>>>>>
>>>>> The last packet sent successfully to the server was 0 milliseconds
>>>>> ago. The driver has not received any packets from the server.
>>>>>  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>>>>> Method)
>>>>> at
>>>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
>>>>>  at
>>>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>>>>> at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
>>>>>  at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
>>>>> at
>>>>> com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
>>>>>  at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:355)
>>>>> at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2479)
>>>>>  at
>>>>> com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2516)
>>>>> at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2301)
>>>>>  at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834)
>>>>> at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
>>>>>  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>>>>> Method)
>>>>> at
>>>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
>>>>>  at
>>>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>>>>> at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
>>>>>  at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
>>>>> at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416)
>>>>>  at
>>>>> com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:317)
>>>>> at java.sql.DriverManager.getConnection(DriverManager.java:571)
>>>>>  at java.sql.DriverManager.getConnection(DriverManager.java:215)
>>>>> at
>>>>> org.apache.sqoop.connector.jdbc.GenericJdbcExecutor.<init>(GenericJdbcExecutor.java:40)
>>>>>  ... 23 more
>>>>> Caused by: java.net.ConnectException: Connection refused
>>>>> at java.net.PlainSocketImpl.socketConnect(Native Method)
>>>>>  at
>>>>> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
>>>>> at
>>>>> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
>>>>>  at
>>>>> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
>>>>> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
>>>>>  at java.net.Socket.connect(Socket.java:579)
>>>>> at java.net.Socket.connect(Socket.java:528)
>>>>> at java.net.Socket.<init>(Socket.java:425)
>>>>>  at java.net.Socket.<init>(Socket.java:241)
>>>>> at
>>>>> com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259)
>>>>>  at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:305)
>>>>> ... 38 more
>>>>>
>>>>
>>>>
>>>
>>
>

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