Hello,

I'm trying to build a program that establishes a connection with the mysql server and save the mysqlpp::connection instance in memory throughout the execution of the application. When I try to do this and get a Query after calling query() from the connection instance and after that call store() my application closes. I've tried to debug this issue and have not come to a solution or to figure out what's causing this.

I got this information from gdb.
#0 mysqlpp::Lockable::lock (this=0x8086a88) at /usr/local/include/mysql++/lockable.h:139
#1 0x0096787e in mysqlpp::Query::lock (this=0xbfd4abc8) at query.cpp:137
#2 0x00967d59 in mysqlpp::Query::store (this=0xbfd4abc8, str=0x8340d34 "SELECT * FROM SqlUser WHERE SqlUser.username='clsk';") at query.cpp:348
#3 0x00969ac9 in mysqlpp::Query::store (this=0xbfd4abc8, p=@0xbfd4abdc) at query.cpp:388
#4 0x080773e1 in eNetworks::cservice::CommandLOGIN::Parser (this=0x8342c00) at /usr/local/include/mysql++/query.h:372

before the application closes. Apparently the last function being called is the following:
(gdb) step
mysqlpp::Lockable::lock (this=0x8086a88) at /usr/local/include/mysql++/lockable.h:139
139 virtual bool lock() { return pimpl_->lock(); }

....

I'd appreciate I can could get with this issue.
Thank you.

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alan.alvarez (AT) us (DOT) army.mil wrote:
Wrap the call to Connection::query() in a try block. If it already is,
make sure it's catching std::exception, just to be sure you're catching
everything. I suspect your program is dying due to an uncaught
exception. If so, then catching that exception and calling its what()
method will be educational.

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I'm sending this reply to the mailing list. Please do not reply to me
directly. This sort of traffic belongs on the list.

alan.alvarez (AT) us (DOT) army.mil wrote:
Okay, can you reduce the problem to a simple example showing how a
global Connection instance fails?

Not likely. That problem was tracked down to a misuse of Visual C++
build settings.

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