Re: prepareCall hangs

Hi,
Problem solved, the connection pool was running out of connections as we
were catching the exception after the connections were released.
Thanks to all for the help.

Akhil Srinivasan

On 6/21/05, Oliver Jowett <oliver(at)opencloud(dot)com> wrote:
>
> Akhil Srinivasan wrote:
>
> > CallableStatement proc = con.prepareCall("{ ? = call
> > \"insAccount\" ( ? ) }");
> >
> > proc.registerOutParameter(1, Types.OTHER);
> > proc.setString(2,userName);
> > this.registerCallableStatementForCancel(proc);
> > logger.debug("registerCallableStatementForCancel(): exit"+userName);
> > /* another thread will call statement.cancel() if timeout exceeded*/
> > proc.execute();
> > this.unregisterCallableStatementForCancel(proc);
> > logger.debug("unregisterCallableStatementForCancel():
> > exit"+userName);
> > ResultSet rset = (ResultSet)proc.getObject(1);
> >
>
> > Occasionally the prepareCall just hangs, as logging statements show that
> > it does not enter the execute().
>
> I find this unlikely as prepareCall doesn't do any I/O or thread-related
> work. It could be getting stuck in a loop, but it seems odd that it
> would only happen intermittently. More likely seems to be that you have
> a problem in registerCallableStatementForCancel.
>
> Can you add more logging immediately before calling
> registerCallableStatementForCancel() to eliminate that possibility?
>
> Alternatively, can you get a thread dump (on Linux/Solaris, send a
> SIGQUIT to the Java process) when it hangs? That'd show us exactly where
> things have stopped.
>
> -O
>