Maximum open cursores  exceeded

Hi folks
I'm getting Ora-1000 maximum open cursors exceeded when running a java application.
I closed all the result sets i opened.what is the problem.
Any Help is Appericiated.

I have class called DB.Inside That i'm creating statement object like this
public static synchronized  ResultSet runQuery(String sQuery,
                                                   Statement dbStmt) {
ResultSet resultset = null;
        openDB();
dbStmt = g_dbCon.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
                                             ResultSet.CONCUR_READ_ONLY);
            resultset = dbStmt.executeQuery(sQuery);
            return resultset;
}where g_dbCon is a global connection object.
From other class i'm calling method like this
Statement dbstmt=null;
DB.runQuery(sql,dbstmt);i have no choice to close statement object every time.

Similar Messages

  • Oracle and "Maximum open cursors exceeded"

    Hi,
    I am using Weblogic 7.0sp2 with Oracle 9.2.0. Since we are using manual JTA
    transactions and the 9.2 drivers are buggy in that respect, we are using the
    9.0.1 thin drivers delivered with weblogic.
    The problem I have is that after a while, we get the now classic "Maximum open
    cursors exceeded" error on connections from our connection pool (used through
    a
    TX datasource). I have of course checked all our JDBC code and it is fine. We
    do not leave any statement/connection open. In fact, I am certain that the
    problem is not caused by our applicative code.
    The reason I am so positive is that the numbers of open (cached) cursors is
    growing, even though there is no activity on our application (I mean no
    activity at all). The number of cursors is regurlarly increasing by one
    every 5 minutes until it reaches the maximum allowed for a session.
    I have listed the statements corresponding to the opened cursors (they
    do not belong to our code, as you might have guessed):
    SELECT sysdate, user from dual
    select longdbcs from javasnm$ where short = :1
    select longname from javasnm$ where short = :1
    As you can see, there are only three different statements. You can get
    the statements from the system view v$open_cursor for a given session
    but it will only give one row per different statement. If you want to know
    the # of opened cursors in your cursor, use v$sesstat with statistic# = 3
    (opened cursor current).
    I suspect something is wrong in the connection testing done by weblogic
    for the pool (I have activated test on reserved connections and test table
    name is "dual") that leaves a resultset/statement behind. What is weird
    though is that the refresh period is still 0 (not 5 minutes as you would
    expect from the cursor growth rate...).
    I would not say that it is an Oracle bug (as stated in some BEA FAQ I read)
    since our application JDBC code does not exhibit the same problem. The
    problem appeared with recent version of WebLogic for which the session
    cursor cache is enabled, I suppose for performance reasons - this
    is set by isssuing "ALTER SESSION SET SESSION_CACHED_CURSORS = ...".
    Talking about this, does anybody know to which value WebLogic sets this
    parameter when intializing the connection (this is neither
    documented/configurable)?
    Up to now, I have come up with possibly two workarounds, neither of which
    is satisfying:
    - resetting the pool from time to time
    - issuing "ALTER SESSION SET SESSION_CACHED_CURSORS = 0" when I get a
    connection from the pool. I have not tested this one personally (read
    in a newsgroup that someone else did successfully) but it is supposed
    to reset the cursor cache that is causing the trouble.
    Any help will be greatly appreciated,
    Regards,
    Thierry.

    Thierry Rouget wrote:
    Hi,
    I am using Weblogic 7.0sp2 with Oracle 9.2.0. Since we are using manual JTA
    transactions and the 9.2 drivers are buggy in that respect, we are using the
    9.0.1 thin drivers delivered with weblogic.
    The problem I have is that after a while, we get the now classic "Maximum open
    cursors exceeded" error on connections from our connection pool (used through
    a
    TX datasource). I have of course checked all our JDBC code and it is fine. We
    do not leave any statement/connection open. In fact, I am certain that the
    problem is not caused by our applicative code.
    The reason I am so positive is that the numbers of open (cached) cursors is
    growing, even though there is no activity on our application (I mean no
    activity at all). The number of cursors is regurlarly increasing by one
    every 5 minutes until it reaches the maximum allowed for a session.
    I have listed the statements corresponding to the opened cursors (they
    do not belong to our code, as you might have guessed):
    SELECT sysdate, user from dual
    select longdbcs from javasnm$ where short = :1
    select longname from javasnm$ where short = :1
    As you can see, there are only three different statements. You can get
    the statements from the system view v$open_cursor for a given session
    but it will only give one row per different statement. If you want to know
    the # of opened cursors in your cursor, use v$sesstat with statistic# = 3
    (opened cursor current).
    I suspect something is wrong in the connection testing done by weblogic
    for the pool (I have activated test on reserved connections and test table
    name is "dual") that leaves a resultset/statement behind. What is weird
    though is that the refresh period is still 0 (not 5 minutes as you would
    expect from the cursor growth rate...).
    I would not say that it is an Oracle bug (as stated in some BEA FAQ I read)
    since our application JDBC code does not exhibit the same problem. The
    problem appeared with recent version of WebLogic for which the session
    cursor cache is enabled, I suppose for performance reasons - this
    is set by isssuing "ALTER SESSION SET SESSION_CACHED_CURSORS = ...".
    Talking about this, does anybody know to which value WebLogic sets this
    parameter when intializing the connection (this is neither
    documented/configurable)?
    Up to now, I have come up with possibly two workarounds, neither of which
    is satisfying:
    - resetting the pool from time to time
    - issuing "ALTER SESSION SET SESSION_CACHED_CURSORS = 0" when I get a
    connection from the pool. I have not tested this one personally (read
    in a newsgroup that someone else did successfully) but it is supposed
    to reset the cursor cache that is causing the trouble.
    Any help will be greatly appreciated,
    Regards,
    Thierry.Hi. We don't make those queries either. I suspect they are internal to the
    oracle driver. One thing you can try is to set the size of the pool's
    statement cache to zero. Oracle will retain cursors for every statement we
    cache. The alternative is also to tell the DBMS to allow a given session
    more cursors.
    Joe

  • More on "maximum open cursors exceeded"

    It seems a lot of people have been seeing this error message, but reading through the posts on the topic hasn't given me any new insight on the problem. Here's an account of my particular situation:
    I am using the XSQL servlet, v.1.0.0.0 with the thin jdbc driver v.1.x. The servlet is running within an Apache server (1.3.12) on a Linux box, and the Oracle database (8.1.5) is located on a Solaris 2.6 machine.
    The servlet accepts HTTP connections, performs the corresponding SQL queries and returns the output from the database to the HTTP client. Here's a simple example:
    (Sorry about potential bad line breaks.)
    client request:
    % telnet xsql-host.some.domain 80
    Trying xxx.xxx.xxx.xxx
    Connected to xsql-host.some.domain.
    GET /xsql/test/listall.xsql
    <server response here>
    listall.xsql:
    <?xml version="1.0"?>
    <page connection="boss" xmlns:xsql="urn:oracle-xsql">
    <accounts>
    <xsql:query tag-case="lower" rowset-element="" row-element="accountinfo">
    select * from test
    </xsql:query>
    </accounts>
    </page>
    Very simple stuff indeed. Now, this has worked perfectly for 3 weeks or so. During this period, the xsql servlet has been stopped and restarted numerous times and the machine hosting the database has been rebooted at least three times. Then, for no apparent reason (as nothing had changed in the setup described above), I started getting "maximum open cursors exceeded" on every request. Since then, I have been unable to get the system working as it had up until now. I haven't restarted the database and I would like to avoid doing so, because that would not be a valid solution for us if the problem reappeared in production. The maximum open cursors setting in Oracle should be correct, since things were running smoothly before.
    From what I can see, the problem could be with the servlet not closing its cursors. One post mentioned that it did, but I would appreciate it if this could be double-checked. Considering the database is the only portion of the system which has been kept running for extended periods of time, it seems to me that this might indeed be the problem.
    Confirmation, workarounds, suggestions, patches, or a consolation box of chocolates would all be appreciated.
    Thanks,
    - Fad
    ([email protected])
    null

    Check which process is making all the cursors on which database. If it is your procedure, try explicitly closing the cursors. I think the cursors are only implicitely closed after the transaction is ended. If you loop and open a cursor within the loop, that might be the problem.
    I also had this problem with Java working over a JDBC connection some time ago on a 815 database. If I recall correctly, that was caused by the JDBC driver and fixed by replacing it with a JDBC driver of 9i.
    The following script is what I used previously in a program that can draw a graph from the results. It is ugly, but does the job.
    Hope this helps,
    L.
    select
      'max cursors',
      to_number(value)
    from
      v$parameter
    where
      name = 'open_cursors'
    union
    select
      substr(lower(username),1,10)||'('||substr(to_char(ses.sid)||','
      ||to_char(serial#),1,9)||')',
      s.value
    from
      v$sesstat s,
      v$statname n,
      v$session ses
    where
    s.statistic#=n.statistic#
    and ses.sid=s.sid
    and n.name like '%cursor%'
    and n.name like '%current%'
    and not (ses.sid between 1 and 6)

  • Maximum open cursors exceeded!!!

    Hi All,
    While executing a procedure am getting this error:
    Error: ORA-00604: error occurred at recursive SQL level 1
    ORA-01000: maximum open cursors exceeded
    Could you please guide me how to get rid of this kind of error and how to close all open cursors together.
    Thanks in Advance
    AP

    am running a procedure on sqldeveloper and i think statement which is causing problem is:
    RLD is cursor
    in the procedure am checking
    open rld;
    if RLD%found then
    begin
    end;
    end if;
    close rld;
    if i comment IF CONDITION then procedure works fine..

  • Maximum open cursors exceeded - after update to 1.1.1.25

    While browsing around a database I keep getting "Maximum open cursors exceeded". The only cure is to disconnect and reconnect. This doesn't happen in the prior version (1.0.0.15).

    Dear Product Development
    I posted a thread about this and a previous version but I am now getting it more and more often in the new version.
    When it happens I get a JAVA log window popping up with the following information in it.
    Level X
    Sequence     130
    Elapsed     0
    Source oracle.dbdev.oviewer.table.DataEditor
    Message      _getTableData
    Is this any help to the product development team in diagnosing the issue.
    Cheers
    Chris

  • Maximum open cursors exceeded with Sybase TG

    Hi,
    Does anyone knows if we can use the HS_OPEN_CURSORS with Oracle transparent gateway for Sybase ?
    I've got the error message :
    ORA-01000: maximum open cursors exceeded
    Thanks

    This depends if the maximum number of cursors exceeded in the GTW or within the db.
    In my eyes the OPEN_CURSORS of the db is normally the limiting factor.
    HS_OPEN_CURSORS defines the maximum number of cursors that can be open on one connection to a non-Oracle system instance.
    The value never exceeds the number of open cursors in the Oracle database server. Therefore, setting the same value as the OPEN_CURSORS initialization parameter in the Oracle database server is recommended.
    So better check out the OPEN_CURSORS of the db and increase them.

  • Maximum open cursors exceeded when inserting to a remote db

    I receive the error:
    ORA-01000: maximum open cursors exceeded
    ORA-02063: preceding line
    from ONTARIO
    (where ONTARIO is my remote db) when I am performing inserts from a pl/sql procedure to the remote db. I am performing two inserts from inside pl/sql and then issuing an explicit commit. I checked the open_cursors init param on both the local db and remote db and it was set to 300. I bumped up the remote db init param to 600. I was able to perform more inserts but still received this error.
    I thought implicit cursors close themselves, especially after a commit. Do I need to do something special to close the cursors on the remote machine?
    Thanks for your time...

    Check which process is making all the cursors on which database. If it is your procedure, try explicitly closing the cursors. I think the cursors are only implicitely closed after the transaction is ended. If you loop and open a cursor within the loop, that might be the problem.
    I also had this problem with Java working over a JDBC connection some time ago on a 815 database. If I recall correctly, that was caused by the JDBC driver and fixed by replacing it with a JDBC driver of 9i.
    The following script is what I used previously in a program that can draw a graph from the results. It is ugly, but does the job.
    Hope this helps,
    L.
    select
      'max cursors',
      to_number(value)
    from
      v$parameter
    where
      name = 'open_cursors'
    union
    select
      substr(lower(username),1,10)||'('||substr(to_char(ses.sid)||','
      ||to_char(serial#),1,9)||')',
      s.value
    from
      v$sesstat s,
      v$statname n,
      v$session ses
    where
    s.statistic#=n.statistic#
    and ses.sid=s.sid
    and n.name like '%cursor%'
    and n.name like '%current%'
    and not (ses.sid between 1 and 6)

  • Maximum Open Cursors Exceeded problem in XSQL

    Hi,
    We are processing an XSQL page by calling XSQLRequest.process() programatically within our application. Within the XSQL page there are several queries which involve multiple nested CURSOR expressions... when the query returns enough rows we are running into the error "ORA-00604: error occurred at recursive SQL level 1 ORA-01000: maximum open cursors exceeded".
    When searching this forum I have seen many (old) postings regarding this error and a bug in the XDK... seems like it was some time ago, but while we set about improving the structure of our XSQL page (or increasing the max open cursor init parameter currently at 500 or both) can anyone confirm that this bug no longer exists?
    Also, any general suggestions on working around this limit rather than increasing it? We have considered splitting up our queries into smaller queries (and merging the results via XSLT) and closing cursors during the session explicitly by issuing commits within the XSQL page... but any better ideas?
    Thanks,
    Bob

    I have found this max open cursors problem to be related to Statement object not being closed. This presents a problem for the use of PreparedStatements, because they are only useful if you can keep them open and resuse them. However, in doing so, each iteration through the PreparedStatement creates another open cursor in the databse rather than reusing the previous one. A work around I discovered by reading about REF CURSORS and I use in JDBC is as follows:
    Assuming a previously prepared PreparedStatement pstmt and a ResultSet rset-
    while (rset.next()) {
    rset.close();
    // This line closes the cursor in the database
    // but does not require you to re-prepare the
    // PreparedStatement. Don't ask me why--ask the
    // Oracle API guys.
    rset.getStatement().close();
    // make ready for GC
    rset = null;

  • SQLException: maximum open cursors exceeded

    hi all,
    i get the following exception when executing my program.
    14:36:02,111 ERROR [STDERR] java.sql.SQLException: ORA-01000: maximum open cursors exceeded
    14:36:02,111 ERROR [STDERR]     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
    14:36:02,111 ERROR [STDERR]     at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)
    14:36:02,111 ERROR [STDERR]     at oracle.jdbc.ttc7.Oopen.receive(Oopen.java:120)
    14:36:02,111 ERROR [STDERR]     at oracle.jdbc.ttc7.TTC7Protocol.open(TTC7Protocol.java:586)
    14:36:02,127 ERROR [STDERR]     at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:385)
    14:36:02,127 ERROR [STDERR]     at oracle.jdbc.driver.OracleConnection.privateCreateStatement(OracleConnection.java:772)
    14:36:02,127 ERROR [STDERR]     at oracle.jdbc.driver.OracleConnection.createStatement(OracleConnection.java:712)
    14:36:02,127 ERROR [STDERR]     at org.jboss.resource.adapter.jdbc.WrappedConnection.createStatement(WrappedConnection.java:145)
    14:36:02,127 ERROR [STDERR]     at abcd.updateMethod(abcd.java:1605)
    14:36:02,127 ERROR [STDERR]     at servlet.abcdServlet.doPost(abcdServlet.java:62)
    14:36:02,127 ERROR [STDERR]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    14:36:02,127 ERROR [STDERR]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    14:36:02,143 ERROR [STDERR]     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    14:36:02,143 ERROR [STDERR]     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
    14:36:02,143 ERROR [STDERR]     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    14:36:02,143 ERROR [STDERR]     at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    14:36:02,143 ERROR [STDERR]     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    14:36:02,143 ERROR [STDERR]     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
    14:36:02,143 ERROR [STDERR]     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
    14:36:02,143 ERROR [STDERR]     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    14:36:02,143 ERROR [STDERR]     at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)the code is like this
    while (result.next())
                           String sql = "update query";
                           Statement = null;
                   st = con.createStatement(); // line No. 1605
                   st.executeUpdate(sql);
                   st.close();
    }anyone had such experience? please post your valuable suggestions.

    You have better to select your data (select connection) and store them in an arraylist for example, then close the 'select connection' and finally
    loop through the arraylist and make as much update as the list size.I disagree. Huge amounts of data could be being pulled from the database (that is one of their strength) and if the data can be processed one row at a time there is no reason to load it all into memory.
    => take a look [here |http://java.sun.com/docs/books/tutorial/jdbc/TOC.html]
    and [here |http://java.sun.com/docs/books/tutorial/jdbc/basics/prepared.html] for preparedstatements
    Ditto to PreparedStatement
    OP. Is it possible that the Statement being returned (from what looks like JBoss) has the close method overwritten and does not actually return the resource (some type of pooling)?

  • Oracle - maximum open cursors exceeded

    Hi! I'm constatly getting the error I pasted below, when this line is executed:
    PreparedStatement stmt = connection.prepareStatement(sqlStatement);
    'connection' is of course an instance of oracle.jdbc.driver.OracleConnection, and 'sqlStatement' is a normal INSERT statement.
    Now, why I'm getting an error that involves cursos if the statement is an insert? One more thing, this error is happening in some enviroments so I think it could be an orcacle server problem (like installation or configuration problem), or it could be the driver, or... I dont know :)
    Well, I hope anyone can give me a tipo about this... Thanks in advance.
    Dario
    ORA-01000: maximum open cursors exceeded
    java.sql.SQLException: ORA-01000: maximum open cursors exceeded
    at oracle.jdbc.dbaccess.DBError.throwSqlExceptionDBError.java:180)
    at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208)
    at oracle.jdbc.ttc7.Oopen.receive(Oopen.java:118)
    at oracle.jdbc.ttc7.TTC7Protocol.open(TTC7Protocol.java:472)
    at oracle.jdbc.driver.OracleStatement.<init>OracleStatement.java:499)
    at oracle.jdbc.driver.OracleStatement.<init>OracleStatement.java:518)
    at oracle.jdbc.driver.OraclePreparedStatement.<init>OraclePreparedStatement.java:210)
    at oracle.jdbc.driver.OraclePreparedStatement.<init>OraclePreparedStatement.java:193)
    at oracle.jdbc.driver.OracleConnection.privatePrepareStatementOracleConnection.java:869)
    at oracle.jdbc.driver.OracleConnection.prepareStatementOracleConnection.java:704)
    ------------------------------------------

    Thanks a lot for all the answers...
    After some tests a made, I found out that in the enviroment I developed the application, the value of the parameter OPEN_CURSORS is 300. I don't know yet which is the value in the test enviroment (where the errors are happening) but I'm pretty sure it is smaller, since I could force the same error in the development enviroment increasing the concurrency of the application (ie, I force the application too many create prepare statements, even much more than the real values the application should accept).
    Well, I have to thank you all again...
    Dario

  • Maximum Open Cursors Exceeded - Oracle 9 & Java Web Server 6.1

    We are facing this problem - maximum open cursors exceeded after migrating our application to Sun Java System Web Server 6.1
    We were not facing this problem with our earlier web server
    Can anybody let us know - is there any setting we need to do to avoid this.
    The current setting for this attribute in the database is quite huge - close to 2000
    One of the "webservd" sessions, (web server user) exceeded this value

    See my reply in your duplicated post:
    http://swforum.sun.com/jive/thread.jspa?threadID=57989&messageID=220483#220483

  • Maximum Open Cursors Exceeded - Oracle & Java

    I am using NetBeans ( Forte 5) for developing an application with Oracle Database. My application makes use of executeUpdate, executeQuery statements inorder to access Database.
    After few insertions and deletions of data through the host language( Java), my application stops working. It gives out the error.
    java.sql.SQLException: ORA-01000: maximum open cursors exceeded[/b
    Is this the problem with Forte or Oracle. I am using Oracle in a network in which i have got a tablespace in the Database server.
    How to tackle this problem.

    I am using 3 methods preparedStatements
    1. execute - returns boolean
    2. executeQuery - returns ResultSet
    3. executeUpdate - returns int
    I am closing the ResultSet object returned by executeQuery using
    close() method.
    Is this the correct way to close the open cursor.
    I access the table attributes using a rs.getString(colNum) and
    rs.getInt(colNum)
    Even then i am getting the maximum open cursors exceeded message.
    Will Oracle open a cursor for execute and executeUpdate which is not returning a ResultSet object .
    If Oracle opens a cursor for these two methods, how should i close the open cursor.

  • Maximum open cursors exceeded prblm , code attached for review

    I am getting the following exception in my code
    java.sql.SQLException: ORA-01000: maximum open cursors exceeded
    My code is as follows
         public ResultSet getFiles() throws Exception
              ResultSet rs = null;
              PreparedStatement pst = null;
              String fileqry = "select * from FILES_SENT where FILESTATUS= 'TOBS' ";
              pst = connection.prepareStatement(fileqry);
              try
                   rs = pst.executeQuery();
              catch(Exception e)
                   System.out.println("In getFiles" + e );
                   System.exit(0);
              return rs;          
         public void RUN()
              while(true)
                   try
                        System.out.println("opening cursor "  );
                        FileResultSet = getFiles(); // polling the DB for new messages
                        if (FileResultSet!= null && FileResultSet.next()) // if new files are found
                             do // for each of the records
                                  String Filename = FileResultSet.getString("FILENAME");
                                  System.out.println("Processing the file " + Filename);
                                  // getting the messagetype from the filename
                                  String MessageType= Filename.substring(0,1);
                                  String InternalMessageID = getInternalMessageID(MessageType);
                                  System.out.println("internalmessageid of the file " + InternalMessageID);
                             while (FileResultSet.next());
                             System.out.println("Processed all messages");
                        else
                             System.out.println("closing cursor "  );
                             FileResultSet.close();
                        Thread.sleep(10);
                   catch(Exception f)
                        System.out.println("exception in RUN " + f);
                        System.exit(0);     
         }The database is oracle 10g
    The loop is going for 300 times with out any data and then comes down with this exception.
    Experts please give your valuable help in this.
    Dinesh

    I had previously tried to close the statement
    immediately after the exceute statement , but the
    resultset is lost after that .
    So where shoud i close the statement ?Don't keep ResultSets around! See this whole thread:
    http://forum.java.sun.com/thread.jspa?threadID=788017
    You should:
    1. Open connection
    2.Open statement
    3.Get ResultSet
    4.Convert ResultSet into something better
    5. close ResultSet
    6.close statement
    7.close connection
    8. return the "something better you converted the ResultSet into"
    Of course 5,6,7 should be coded in a way they ALWAYS get executed regardless of any exception may occur (for example in finally block).
    1 to 8 may also be replaced by (unless your purpose is only to learn JDBC basics):
    1. use some kind of high level framework/library/standard (Hibernate,Ibatis,JPA if you use Java 1.5+... you name it, there are as much as you may need, or maybe even a few more!)
    Hope this helps,
    Riccardo

  • Maximum open cursors exceeded and cqj0 trace

    From this morning on the database is reporting the maximum open cursors exceeded in the cqj0 trace. When I see the alert log the error message appear again and again. I try to solve it by setting the open_cursor parameter but the problem do not disappear. I have an oracle rac database 11.1.0.7, OS is Suse Linux Enterprise 10. Also I have configured a local capture process in my database.
    Thank you.

    Hi,
    Please perfrom the following action plan
    1)sql> show parameter cursor_sharing
    2) generate the AWR report for the duration of 60min when you were getting the error and paste the contents of section
    sql ordered by version count
    Kind Regards,
    Rakesh jayappa

  • Maximum open cursors exceeded when reversing

    He llo,
    I get the following zrror when trying to reverse a table from an Oracle Database preventing me to reverse the table:
    java.sql.SQLException: ORA-01000: maximum open cursors exceeded
    Thanks

    Hi Jean,
    I think this is related to the issue I faced a while back.
    Thread: Limit/remove inactive database connections generated by ODI
    My solution was to write a custom linux shell script to kill off old ODI sessions in the database. I scheduled this job to run via the crontab.
    sqlplus -s / <<!
    set feedback off
    set trimspool on
    set pages 9999
    spool /tmp/kill_odi_db_sessions.tmp
    select 'ALTER SYSTEM KILL SESSION '''||sid||','|| serial#||''' immediate;'
    from v\$session
    where username ='<ODI_USER>'
    and status ='INACTIVE'
    and LAST_CALL_ET > 1800
    spool off
    exit
    sqlplus -s / <<!
    @/tmp/kill_odi_db_sessions_$ORACLE_SID.tmp
    exit
    Hope this helps!
    Matt

  • Maximum open cursors exceeded from Oracle XA Connection pool

    I am on WLS 6.1 sp2.
    When i leave the server up overnight unaccessed and come back and see in the morning,
    I see the following stacktrace on the server console.
    I dont think its causing any harm, but is there anyway to prevent this from occuring?
    java.sql.SQLException: ORA-01000: maximum open cursors exceeded
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:168)
    at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208)
    at oracle.jdbc.ttc7.Oopen.receive(Oopen.java:118)
    at oracle.jdbc.ttc7.TTC7Protocol.open(TTC7Protocol.java:466)
    at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:413)
    at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:432)
    at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedStatement.java:182)
    at oracle.jdbc.driver.OracleCallableStatement.<init>(OracleCallableStatement.java:102)
    at oracle.jdbc.driver.OracleCallableStatement.<init>(OracleCallableStatement.java:86)
    at oracle.jdbc.driver.OracleConnection.privatePrepareCall(OracleConnection.java:736)
    at oracle.jdbc.driver.OracleConnection.prepareCall(OracleConnection.java:622)
    at oracle.jdbc.xa.client.OracleXAResource.start(OracleXAResource.java:163)
    at weblogic.jdbc.jta.VendorXAResource.start(VendorXAResource.java:41)
    at weblogic.transaction.internal.ServerResourceInfo.start(ServerResourceInfo.java:1032)
    at weblogic.transaction.internal.ServerResourceInfo.xaStart(ServerResourceInfo.java:975)
    at weblogic.transaction.internal.ServerResourceInfo.enlist(ServerResourceInfo.java:234)
    at weblogic.transaction.internal.ServerTransactionImpl.enlistResource(ServerTransactionImpl.java:374)
    at weblogic.jdbc.common.internal.ConnectionEnv.test(ConnectionEnv.java:937)
    at weblogic.common.internal.ResourceAllocator.reserve(ResourceAllocator.java:465)
    at weblogic.common.internal.ResourceAllocator.reserveUnused(ResourceAllocator.java:376)
    at weblogic.common.internal.ResourceAllocator.trigger(ResourceAllocator.java:1103)
    at weblogic.time.common.internal.ScheduledTrigger.executeLocally(ScheduledTrigger.java:238)
    at weblogic.time.common.internal.ScheduledTrigger.execute(ScheduledTrigger.java:229)
    at weblogic.time.server.ScheduledTrigger.execute(ScheduledTrigger.java:65)
    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

    Hi. I think this is an oracle driver problem, in all likelihood.
    We test a connection with:
    Statement stmt = c.createStatement();
    stmt.execute(sql);
    Where the string sql is "select count(*) from DUAL" if you named your test table as 'DUAL'.
    We obtain no result set, so the driver shouldn't be accruing cursors...
    Can you upgrade to the latest oracle driver?
    Can you upgrade to the latest version of 6.1?
    Jeeva wrote:
    I am on WLS 6.1 sp2.
    When i leave the server up overnight unaccessed and come back and see in the morning,
    I see the following stacktrace on the server console.
    I dont think its causing any harm, but is there anyway to prevent this from occuring?
    java.sql.SQLException: ORA-01000: maximum open cursors exceeded
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:168)
    at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208)
    at oracle.jdbc.ttc7.Oopen.receive(Oopen.java:118)
    at oracle.jdbc.ttc7.TTC7Protocol.open(TTC7Protocol.java:466)
    at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:413)
    at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:432)
    at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedStatement.java:182)
    at oracle.jdbc.driver.OracleCallableStatement.<init>(OracleCallableStatement.java:102)
    at oracle.jdbc.driver.OracleCallableStatement.<init>(OracleCallableStatement.java:86)
    at oracle.jdbc.driver.OracleConnection.privatePrepareCall(OracleConnection.java:736)
    at oracle.jdbc.driver.OracleConnection.prepareCall(OracleConnection.java:622)
    at oracle.jdbc.xa.client.OracleXAResource.start(OracleXAResource.java:163)
    at weblogic.jdbc.jta.VendorXAResource.start(VendorXAResource.java:41)
    at weblogic.transaction.internal.ServerResourceInfo.start(ServerResourceInfo.java:1032)
    at weblogic.transaction.internal.ServerResourceInfo.xaStart(ServerResourceInfo.java:975)
    at weblogic.transaction.internal.ServerResourceInfo.enlist(ServerResourceInfo.java:234)
    at weblogic.transaction.internal.ServerTransactionImpl.enlistResource(ServerTransactionImpl.java:374)
    at weblogic.jdbc.common.internal.ConnectionEnv.test(ConnectionEnv.java:937)
    at weblogic.common.internal.ResourceAllocator.reserve(ResourceAllocator.java:465)
    at weblogic.common.internal.ResourceAllocator.reserveUnused(ResourceAllocator.java:376)
    at weblogic.common.internal.ResourceAllocator.trigger(ResourceAllocator.java:1103)
    at weblogic.time.common.internal.ScheduledTrigger.executeLocally(ScheduledTrigger.java:238)
    at weblogic.time.common.internal.ScheduledTrigger.execute(ScheduledTrigger.java:229)
    at weblogic.time.server.ScheduledTrigger.execute(ScheduledTrigger.java:65)
    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

Maybe you are looking for

  • How to trace if objects are deleted from a scenario

    Hi Experts, Can you please tell me if some of my objects get deleted from my scenario how can I trace? like by which user this is done or any log is there from where we can find this one? Thanks Sugata B

  • Cannot find the new binding

    Hi !! I am using jdeveloper 11.1.1.5!! I had dragged and dropped mu OpcLoseId [an LOV] from my OpportHd table in a af:form. I had passed this value as a parameter to my AMImpl Method. So that while my user clicks the button this method get executed.

  • How to call business workflow in PI?

    Hi,gurus: How to call business workflow in PI and vice versa? Can I implement it using idoc adapter or RFC adapter?Or is it possible to expose the workflow to a web service? Any help will be appreciated.

  • Email a photo, ele.11 win 8.

    When in Editor and selecting a photo then going to Share and selecting Email Attachment and sending it to myself upon opening the attacment in my email it shows my Download MGR. and all its folders.  Is this correct or should just the selected photo

  • Font Issue in Safari after Migration Assistant Upgrade

    I just used Migration Assistant to move from an old Mac Pro tower to a new Mac Pro trash can (chose not to transfer Applications) and most everything is fine except for a strange font issue in Safari. Safari doesn't seem to render Helvetica. Instead