Unable to read field value from main table - unexpected socket read error

Question

Hi Friends,
While executing the below code, I am able to get the value of the field 'id' but i am unable to get the value for the 'materialnumber' field. i am getting the below exception
+com.sap.mdm.commands.CommandException: com.sap.mdm.internal.protocol.manual.ProtocolException: java.io.IOException: Unexpected socket read.  Result is -1.
     at com.sap.mdm.data.commands.AbstractRetrieveLimitedRecordsCommand.execute(AbstractRetrieveLimitedRecordsCommand.java:158)
     at com.sap.mdm.data.commands.RetrieveLimitedRecordsCommand.execute(RetrieveLimitedRecordsCommand.java:157)
     at updaterecords.main(updaterecords.java:126)
Caused by: com.sap.mdm.internal.protocol.manual.ProtocolException: java.io.IOException: Unexpected socket read.  Result is -1.
     at com.sap.mdm.internal.protocol.manual.AbstractProtocolCommand.execute(AbstractProtocolCommand.java:100)
     at com.sap.mdm.data.commands.AbstractRetrieveLimitedRecordsCommand.execute(AbstractRetrieveLimitedRecordsCommand.java:146)
     ... 2 more
Caused by: java.io.IOException: Unexpected socket read.  Result is -1.
     at com.sap.mdm.internal.net.DataSocket.receiveData(DataSocket.java:59)
     at com.sap.mdm.internal.net.ConnectionImpl.readInt(ConnectionImpl.java:417)
     at com.sap.mdm.internal.net.ConnectionImpl.nextMessage(ConnectionImpl.java:501)
     at com.sap.mdm.internal.net.ConnectionImpl.receiveMessage(ConnectionImpl.java:472)
     at com.sap.mdm.internal.net.ConnectionImpl.send(ConnectionImpl.java:209)
     at com.sap.mdm.internal.net.ReservedConnection.send(ReservedConnection.java:105)
     at com.sap.mdm.internal.protocol.manual.AbstractProtocolCommand.execute(AbstractProtocolCommand.java:97)
     ... 3 more+
import com.sap.mdm.commands.AuthenticateUserSessionCommand;
import com.sap.mdm.commands.CommandException;
import com.sap.mdm.commands.CreateUserSessionCommand;
import com.sap.mdm.commands.DestroySessionCommand;
import com.sap.mdm.commands.GetRepositoryRegionListCommand;
import com.sap.mdm.data.Record;
import com.sap.mdm.data.RegionProperties;
import com.sap.mdm.data.ResultDefinition;
import com.sap.mdm.data.commands.RetrieveLimitedRecordsCommand;
import com.sap.mdm.ids.TableId;
import com.sap.mdm.net.ConnectionException;
import com.sap.mdm.net.ConnectionPool;
import com.sap.mdm.net.ConnectionPoolFactory;
import com.sap.mdm.schema.FieldProperties;
import com.sap.mdm.schema.RepositorySchema;
import com.sap.mdm.schema.commands.GetFieldListCommand;
import com.sap.mdm.schema.commands.GetRepositorySchemaCommand;
import com.sap.mdm.search.Search;
import com.sap.mdm.server.DBMSType;
import com.sap.mdm.server.RepositoryIdentifier;
public class updaterecords {
     public static void main(String[] args) {
          try {               
                String serverName = "159.112.6.26";
                ConnectionPool connections = null;
                try {
                     connections = ConnectionPoolFactory.getInstance(serverName);
                } catch (ConnectionException e) {
                     e.printStackTrace();
                     return;
               // specify the repository to use
               // alternatively, a repository identifier can be obtain from the GetMountedRepositoryListCommand
               String repositoryName = "DEMO";
               String dbmsName = "MDMD";
               RepositoryIdentifier reposId = new RepositoryIdentifier(repositoryName, dbmsName, DBMSType.ORACLE);
               // get list of available regions for the repository
               GetRepositoryRegionListCommand regionListCommand = new GetRepositoryRegionListCommand(connections);
               regionListCommand.setRepositoryIdentifier(reposId);
               try {
                    regionListCommand.execute();
               } catch (CommandException e) {
                    e.printStackTrace();
                    return;
               RegionProperties[] regions = regionListCommand.getRegions();
               // create a user session
               CreateUserSessionCommand sessionCommand = new CreateUserSessionCommand(connections);
               sessionCommand.setRepositoryIdentifier(reposId);
               sessionCommand.setDataRegion(regions[0]); // use the first region
               try {
                    sessionCommand.execute();
               } catch (CommandException e) {
                    e.printStackTrace();
                    return;
               String sessionId = sessionCommand.getUserSession();
               // authenticate the user session
               String userName = "meter1";
               String userPassword = "meter1";
               AuthenticateUserSessionCommand authCommand = new AuthenticateUserSessionCommand(connections);
               authCommand.setSession(sessionId);
               authCommand.setUserName(userName);
               authCommand.setUserPassword(userPassword);
               try {
                    authCommand.execute();
               } catch (CommandException e) {
                    e.printStackTrace();
                    return;
               GetRepositorySchemaCommand cmd=new GetRepositorySchemaCommand(connections);
               cmd.setSession(sessionId);
               try{
                    cmd.execute();               
               }catch(CommandException e){
                    System.out.println(e.getLocalizedMessage());
               RepositorySchema repsch=cmd.getRepositorySchema();
               // the main table, hard-coded
               TableId mainTableId = new TableId(1);     
               // specify the result definition (what to retrieve); in this example, nothing
               ResultDefinition rd = new ResultDefinition(mainTableId);
               // select all records
               Search search = new com.sap.mdm.search.Search(mainTableId);
               //get fields
               GetFieldListCommand getFieldListCommand = new GetFieldListCommand(connections);
               getFieldListCommand.setSession(sessionCommand.getUserSession());
               getFieldListCommand.setTableId(mainTableId);
               try {
                    getFieldListCommand.execute();
               } catch (CommandException e) {
                    System.out.println(e);
               FieldProperties[] lookupFields = getFieldListCommand.getFields();
               // add fields to records to retrieve
               rd.addSelectField(repsch.getFieldId("Products","Id"));
               rd.addSelectField(repsch.getFieldId("Products","MaterialNumber"));                              
               // retrieve the records
               RetrieveLimitedRecordsCommand limitingCommand = new RetrieveLimitedRecordsCommand(connections);
               limitingCommand.setSession(sessionId);
               limitingCommand.setResultDefinition(rd);
               limitingCommand.setSearch(search);
               //limitingCommand.setPageSize(2000);
               try {
                    limitingCommand.execute();
               } catch (CommandException e) {
                    e.printStackTrace();
                    return;
               System.out.println("Record count is " + limitingCommand.getRecords().getCount()+"\n");
               Record[] records=limitingCommand.getRecords().getRecords();
System.out.println(records[0].getFieldValue(repsch.getFieldId("Products","Id"))+ " \n");
System.out.println(records[0].getFieldValue(repsch.getFieldId("Products","MaterialNumber"))+ " \n");
               // finally destroy the session
               DestroySessionCommand destroySessionCommand = new DestroySessionCommand(connections);
               destroySessionCommand.setSession(sessionId);
               try {
                    destroySessionCommand.execute();
               } catch (CommandException e) {
                    e.printStackTrace();
                    return;
          } catch (Exception e) {
               System.out.println(e.getLocalizedMessage());
               e.printStackTrace();
Kindly let me know where i am going wrong. MaterialNumber field is a TEXT not a lookup table field.  Above fields are from the main table.
Thanks,
Raags

Answer 1

Hi Friends,
I got the solution. It was the error because of not having a the below statement.
limitingCommand.setPageSize(1);
As i havent used that statement, it was trying to get 1000 records, and i dont know exactly what makes this to get that error. Anyhow., As i want to use for updation, i cn live with one record.
Thanks,
Raags