SQL Exception blocks everyone .... why

Hello to all,
I have an some question towards SQL exception in JDBC, when there is an error trying to recieve infomation from a database it stops all access for everyone log on at the same time.
For example, if I try to insert a string in a field that doesn't exist or insert a string where an I should use an int, an sql excption will be throw, and it blocks there (for everyone), meaning another users would like to search the datbase for information, but recieves nothing. I'm using a connection pool for the connection to my database in each one of my servlets that also
"implements SingleThreadModel" .
Could it be because of the SingleThreadModel, or has it to do with the connection pool ???
All help is welcomed
Thanks ..... Wally

U can set the Connection with proper concurrency like CONCUR_UPDATABLE ....that helps in working with Concurrent users accesing the same table or DB..
Note: this depends on the Driver that u r using its not supported by many drivers.
sriram

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Why is User defined exception block not reaching

I want to catch exception if wrong column name is there in a select statement.
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what is that i am missing here?
declare
vcTypeID varchar2(10);
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Hi,
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2 e EXCEPTION;
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Is this the complete code you have, or this is just part of the whole code?
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SQL> set serverout on size 100000
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2 salary_too_high EXCEPTION;
3 current_salary NUMBER := 20000;
4 max_salary NUMBER := 10000;
5 erroneous_salary NUMBER;
5 BEGIN
6     begin
7
8    if current_salary > max_salary then
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10    END IF;
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16 end;
17 end;
18 /
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PL/SQL procedure successfully completed.

Pl/sql exception not caught.

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sqlplus -s << EOF
abc/[email protected]
set pages 0
SET SERVEROUTPUT ON BUFFER 100000000
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dbms_output.ENABLE(1000000);
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TRUNC(SYSDATE)
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EXCEPTION
WHEN OTHERS THEN
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=============
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=========
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Hi,
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select 'debalina' INTO cnt from dual;
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EXCEPTION
WHEN invalid_number THEN
DBMS_OUTPUT.PUT_LINE('error has occured inside begin block');
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2 cnt NUMBER(5):=0;
3 BEGIN
4 select 'debalina' INTO cnt from dual;
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6 EXCEPTION
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DECLARE
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2 cnt NUMBER(5):=0;
3 BEGIN
4 select 'debalina' INTO cnt from dual;
5 DBMS_OUTPUT.PUT_LINE(to_char(cnt));
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8 DBMS_OUTPUT.PUT_LINE('error has occured inside main block');
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2 cnt NUMBER(35):=0;
3 BEGIN
4 select 'debalina' INTO cnt from dual;
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7 WHEN Value_error THEN
8 DBMS_OUTPUT.PUT_LINE('error has occured inside main block');
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Hi all,
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Hi ,
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at com.ups.ops.dm.dao.service.DAOActionServiceModule.service(Unknown Source)
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154)
at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.ja
va:89)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
176)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInt
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at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
176)
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at com.ups.ops.dm.command.CommandManager.doCommand(Unknown Source)
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at com.ups.ops.dm.edc.db.EDCDataAccessObjectManager.lookups(Unknown Source)
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at com.ups.ops.dm.command.CommandManager.doCommand(Unknown Source)
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at com.ups.ops.dm.edc.receiver.OPLDReceiverMDB.onMessage(Unknown Source)
at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
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at java.lang.reflect.Method.invoke(Method.java:597)
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at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocati
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at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
154)
at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.ja
va:89)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
176)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
176)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInt
erceptor.java:126)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterc
eptor.java:114)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
176)
at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:210)
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at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:466)
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at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516)
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Hi,
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Hi,
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hi !
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create or replace
PROCEDURE X_INSERT
(P_ID NUMBER,
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P_DATE2 DATE
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a NUMBER;
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>
I am just wondering if it's except-able to put and insert in the exception block?
>
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   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at System.ServiceModel.Channels.IRequestChannel.EndRequest(IAsyncResult result)
   at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.RequestCallback(IAsyncResult result)
MessageId: {B24EF5B8-298A-4D4F-AA98-5E639361A7DB}
InstanceID: {F8924129-265B-4652-B20E-8D25F8F20A51}
If "System.SystemException" can't catch all exception, which type can catch all exception ? I want to catch all exception in this catch block.
thanks
Gary

SQL Exception not in streaming mode

Hi friends
I am using oracle driver and I am getting this error on queries very randomly.I am using Oracle8i 8.1.5 on NT machine.
SQL Exception not in streaming mode
Can anybody explaing why and when this error gets generated and what is the solution for it.
Please contact me at the following emailids
[email protected]
[email protected]
null

What do you do with the connection before the prepareStatement()? Is your program small enough to post here (use [code]...[/code] tags)? Do you have multiple threads that try to use the same connection simultaneously? Do you work with Long, Clob or Blob columns? What JDBC driver version?

SQL exception from servlet

Can anyone suggest why i get an sql expection from my servlet? Or suggest another way performing this. I just get a my table but no results becuase of an sql exception in tomcat server console. degree id is the parameter from the html page
try{
     conn = DriverManager.getConnection(url, user, password);
     String selectSQL = "SELECT * from book2readinglist WHERE readinglist = " + degreeid + ""; // change * to book_id or whatever it is
     System.err.println("DEBUG: Query: " + selectSQL);
     Statement stmt = conn.createStatement();
     ResultSet rs1 = stmt.executeQuery(selectSQL);
     //print out html head element
     out.println("<head>"+
          "<meta http-equiv=\"Content-type\" content=\"text/html; charset=utf-8\">" +
          "<title>books</title>" +
          "</head>");
     // print out table header
     out.println("<table border=\"1\" cellspacing=\"0\" cellpadding=\"3\">" +
          "<tr><th><h4>Title</th></h4><th><h4>Author</th></h4><th><h4>Category</th></h4><th><h4>Cover</th></h4><th><h4>Publisher</th></h4><th><h4>Price</th></h4><th></th></tr>");
     //print out table rows one for each row returned in rs1
     while(rs1.next()){
          String selectSQL2 = "SELECT book from book2readinglist WHERE readinglist = " + degreeid + "";
          System.err.println("DEBUG: Query: " + selectSQL2);
Statement stmt2 = conn.createStatement();
ResultSet rs2 = stmt2.executeQuery(selectSQL2);
          while(rs2.next()){
          String selectSQL3 = "SELECT * from books WHERE idcol = " + rs2.getString("book") + ""; /
          System.err.println("DEBUG: Query: " + selectSQL3);
Statement stmt3 = conn.createStatement();
ResultSet rs3 = stmt3.executeQuery(selectSQL3);
     out.print("<tr>");
     out.print("<td><h5>" + rs3.getString("title") + "</td>");
     out.print("<td><h5>" + rs3.getString("author") + "</td>");
     out.print("<td><h5>" + rs3.getString("category") + "</td>");
     out.print("<td><img src=\"/assignment1/img/" + rs3.getString("cover") + "\" /></td>");
     out.print("<td><h5>" + rs3.getString("publisher") + "</td>");
     out.print("<td><h5>" + rs3.getString("price") + "</td></h5>");
Thanks
Nick

i am afraid, exception stack trace would help us a lot in identifiyin wat, where, why an exception occured...

SQL Exception blocks everyone .... why

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