any reason why you're not using DBCP ? if you dont mind using a connection pool take a look at examples provided at
http://svn.apache.org/viewvc/commons/proper/dbcp/trunk/doc/ManualPoolingDataSourceExample.java?revision=132018&view=markup also if you want your instance variables to automatically map to DB columns I would suggest Hibernate http://www.ibm.com/developerworks/websphere/techjournal/0409_patil/0409_patil.html HTH Martin ______________________________________________ Disclaimer and confidentiality note Everything in this e-mail and any attachments relates to the official business of Sender. This transmission is of a confidential nature and Sender does not endorse distribution to any party other than intended recipient. Sender does not necessarily endorse content contained within this transmission. > Subject: Re: Intermitant DB Problem in tomcat:java.sql.SQLException: Io > exception: Connection reset by peer: JVM_recv in socket input stream read > To: users@tomcat.apache.org > From: [EMAIL PROTECTED] > Date: Tue, 9 Sep 2008 00:16:17 +0530 > > David,Actually Resource element is used when we want to map a datascr to a > JNDI Resource and call from aoos.But in my case there is no JNDI naming of > datasource or database!! > all parameters are hard coded . > In that case wat can i do!!! > I have modified my code slightly to look like ths!!! will this be > helpfull??? > > catch(Exception exp) > { > theLog.error("Exception while getting a Datasource > connection..Trying again..."); > theLog.error(exp); > int i=1; > do{ > try{ > return ds.getConnection(); > } > catch(Exception e){ > > theLog.error("Try:"+i+"Exception while > getting a Datasource connection..."); > theLog.error(e); > if(i==3) > throw e; > > } > i++ > }while(i<=3) > > } > > > > Regards, > Thangavel Sankaranarayanan > > > > > David Smith > <[EMAIL PROTECTED] > > To > Tomcat Users List > 09/08/2008 11:51 <users@tomcat.apache.org> > PM cc > > Subject > Please respond to Re: Intermitant DB Problem in > "Tomcat Users tomcat:java.sql.SQLException: Io > List" exception: Connection reset by > <[EMAIL PROTECTED] peer: JVM_recv in socket input > che.org> stream read > > > > > > > > > > > Actually I believe tomcat 4.1 still predominantly used server.xml for > context definitions. Take a look in there for a <ResourceParams ...> > ... </ResourceParams> element under your webapp's <Context ...> ... > </Context> element. I could be wrong about that -- it's been a *very* > long time since I've done anything with that version. > > --David > > Thangavel Sankaranarayanan wrote: > > Hi David, > > > > In my webapps directory ,i can find Conext.xml (nameof context.xml).in my > > context.xml the following is defined.. > > > > where do i need to configure it ,David?? > > > > <Context path="/mpp" docBase="D:/projects/mpp/dealer/release071010" > > debug="0" privileged="true"> > > > > <Realm className="au.com.workconsult.catalina.realm.NdsJNDIRealm" > > debug="99" > > connectionName="cn=Directory Manager" > > connectionPassword="hadepyhkl" > > connectionURL="ldap://vanja1234:389"; > > digest="SHA" > > roleBase="ou=mpp,ou=Groups,dc=vodafone,dc=com,dc=au" > > roleName="cn" > > roleSearch="(uniquemember={0})" > > roleSubtree="true" > > userPassword="userPassword" > > userPattern="uid={0},dc=abc,dc=com,dc=in" > > /> > > > > </Context> > > > > > > > > Regards, > > Thangavel Sankaranarayanan > > > > > > > > > > > > > David Smith > > > <[EMAIL PROTECTED] > > > > > To > > Tomcat Users List > > > 09/08/2008 10:44 <users@tomcat.apache.org> > > > PM > cc > > > > > > Subject > > Please respond to Re: Intermitant DB Problem in > > > "Tomcat Users tomcat:java.sql.SQLException: Io > > > List" exception: Connection reset by > > > <[EMAIL PROTECTED] peer: JVM_recv in socket input > > > che.org> stream read > > > > > > > > > > > > > > > > > > > > > > > > > > > > > I think so. Tomcat 4.1.x relies on DBCP 1.0 whose docs aren't readily > > available anymore. If you can find the source for DBCP 1.0, you could > > take a look in the source code and get that answer. Or you could just > > try it on your test system and see if it works. :-) > > > > The manner the validation query is added to tomat's config is different > > though. You add it in the ResourceParams element the same way other > > properties are defined in your version. > > > > --David > > > > Thangavel Sankaranarayanan wrote: > > > > > >> Hi David, > >> Thanks !!! > >> > >> Is the validationQuery applicable to tomacat 4.x. > >> I am using tomcat 4.x in windows2000 > >> > >> > >> Regards, > >> Thangavel Sankaranarayanan > >> > >> > >> > >> > >> > >> > > > > > >> David Smith > >> > > > > > >> <[EMAIL PROTECTED] > >> > > > > > >> > > >> > > To > > > >> Tomcat Users List > >> > > > > > >> 09/08/2008 09:19 <users@tomcat.apache.org> > >> > > > > > >> PM > >> > > cc > > > > > > > > Subject > > > >> Please respond to Re: Intermitant DB Problem in > >> > > > > > >> "Tomcat Users tomcat:java.sql.SQLException: Io > >> > > > > > >> List" exception: Connection reset by > >> > > > > > >> <[EMAIL PROTECTED] peer: JVM_recv in socket input > >> > > > > > >> che.org> stream read > >> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >> > >> > >> I've partially given it to you already. I'm assuming for the purposes > >> of this thread you have tomcat 5.5.x or tomcat 6.0.x and are using the > >> tomcat provided database pooling. Find the <Resource ... /> element in > >> your webapp's context xml file where you defined your database pool and > >> add an attribute named validationQuery with a value of "select 1". Then > >> restart your webapp. > >> > >> --David > >> > >> Thangavel Sankaranarayanan wrote: > >> > >> > >>> Please help me in setting up a Validation Querry!!! > >>> I am not aware of it!! > >>> > >>> Regards, > >>> Thangavel Sankaranarayanan > >>> > >>> > >>> > >>> > >>> > >>> > >> > >>> David Smith > >>> > >>> > >> > >>> <[EMAIL PROTECTED] > >>> > >>> > >> > >>> > > >>> > >>> > >> To > >> > >> > >>> Tomcat Users List > >>> > >>> > >> > >>> 09/08/2008 06:24 <users@tomcat.apache.org> > >>> > >>> > >> > >>> PM > >>> > >>> > >> cc > >> > >> > >> > >> Subject > >> > >> > >>> Please respond to Re: Intermitant DB Problem in > >>> > >>> > >> > >>> "Tomcat Users tomcat:java.sql.SQLException: Io > >>> > >>> > >> > >>> List" exception: Connection reset by > >>> > >>> > >> > >>> <[EMAIL PROTECTED] peer: JVM_recv in socket input > >>> > >>> > >> > >>> che.org> stream read > >>> > >>> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >>> Two questions: > >>> > >>> 1. Is the db server on the same box as the tomcat server? If not, have > >>> you ruled out network hardware issues between the db server and tomcat? > >>> > >>> 2. Does your db pool definition have the attribute > >>> validationQuery="select 1"? That would pre-test your connections > before > >>> returning one on ds.getConnection(), regenerating them if they fail. > >>> > >>> --David > >>> > >>> Thangavel Sankaranarayanan wrote: > >>> > >>> > >>> > >>>> Hi , > >>>> > >>>> I am getting the following error when connecting to oracle database, > >>>> > >>>> Has any one seen this kind of errors before? is this the problem with > >>>> tomcat in loosing the connections?? > >>>> I am getting this error once in 5 hrs and i get a HTTPStatus500 error > >>>> > >>>> > >>>> > >>> and > >>> > >>> > >>> > >>>> when a user tries again it gets okay and it is working > >>>> How can i resolve this Intermitant DB Problem in tomcat!!! > >>>> > >>>> java.sql.SQLException: Io exception: Connection reset by peer: > JVM_recv > >>>> > >>>> > >>>> > >>> in > >>> > >>> > >>> > >>>> socket input stream read > >>>> > >>>> This is the Exception details in my application logs: > >>>> DEBUG au.com.vodafone.mpp.bos.MPPFactory - Calling getConnection > >>>> > >>>> > >>>> > >>> method > >>> > >>> > >>> > >>>> of Datasrc Class:600991 > >>>> DEBUG au.com.vodafone.mpp.da.DataSrc - Inside getConnection() > >>>> > > method > > > >>>> > >>> of > >>> > >>> > >>> > >>>> DataScr > >>>> DEBUG au.com.vodafone.mpp.da.DataSrc - About to get a Connection > >>>> > > from > > > >>>> SharedPoolDatasrc and return it back... > >>>> ERROR au.com.vodafone.mpp.da.DataSrc - Exception while get a > >>>> > >>>> > >>>> > >>> Datasource > >>> > >>> > >>> > >>>> connection > >>>> ERROR au.com.vodafone.mpp.da.DataSrc - java.sql.SQLException: Io > >>>> exception: Connection reset by peer: JVM_recv in socket input stream > >>>> > >>>> > >> read > >> > >> > >>>> DEBUG au.com.vodafone.mpp.bos.MPPFactory - > >>>> Exception:java.sql.SQLException: Io exception: Connection reset by > >>>> > > peer: > > > >>>> JVM_recv in socket input stream read > >>>> WARN org.apache.struts.action.RequestProcessor - Unhandled > >>>> > > Exception > > > >>>> thrown: class java.sql.SQLException > >>>> > >>>> > >>>> This is my code: > >>>> > >>>> static public Connection getConnection() throws Exception { > >>>> theLog.debug("Inside getConnection() method of DataScr"); > >>>> try > >>>> { > >>>> > >>>> if (ds == null) > >>>> { > >>>> theLog.debug("SharedPoolDatasrc is NULL: > >>>> > > Serious > > > >>>> Error "); > >>>> System.out.println("SERIOUS ERROR 99"); > >>>> } > >>>> theLog.debug("About to get a Connection from > >>>> SharedPoolDatasrc and return it back..."); > >>>> return ds.getConnection(); > >>>> } > >>>> catch(Exception exp) > >>>> { > >>>> theLog.error("Exception while get a Datasource > >>>> connection"); > >>>> theLog.error(exp); > >>>> throw exp; > >>>> } > >>>> } > >>>> > >>>> > >>>> > >>>> Regards, > >>>> Thangavel Sankaranarayanan > >>>> > >>>> > >>>> > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > _________________________________________________________________ Stay up to date on your PC, the Web, and your mobile phone with Windows Live. http://clk.atdmt.com/MRT/go/msnnkwxp1020093185mrt/direct/01/
