Nevermind. This is a known bug.
http://issues.apache.org/jira/browse/LOGCXX-129
I should of just stayed with 97 which was working fine.
Thanks,
Pete
On Fri, Jun 29, 2007 at 06:09:26AM -0700, [EMAIL PROTECTED] wrote:
>
> Hi, I've been using the subversion log4cxx-10.0.0, which is currently at
> revision 551872.
>
> I'm running on an ubuntu linux box running kernel 2.6.20-16, and g++ 4.1.2
>
> I've been seeing severe race conditions between threads when logging to a
> FileAppender.
>
> Basically, when multiple threads write to the same log file, some of the data
> is corrupt.
>
> Here is a little program will show the issue.
>
> I've been pouring over the docs, and the mailing list archives, but I can't
> find a clear explanation as to why this shouldn't work.
>
> Any ideas what I'm doing wrong? Thanks, Pete
>
> ----------------------------------------------------------------------------
> #include <pthread.h>
>
> #include <iostream>
> #include <sstream>
> #include <vector>
>
> #include <log4cxx/logger.h>
>
> const int NUMTHREADS = 100 ;
> const int NUMWRITES = 100 ;
>
> log4cxx::LoggerPtr thread_logger =
> log4cxx::Logger::getLogger("ThreadManager");
> using std::cerr;
> using std::endl;
>
> void *Run( void *ptr ){
>
> int *thread_number = reinterpret_cast<int*>(ptr);
>
> for (int i=0 ; i< NUMWRITES ; i++){
> std::ostringstream msg;
> msg << "Thread[" << *thread_number << "], Write [" << ( i + 1 ) <<
> "]";
> LOG4CXX_DEBUG(thread_logger, msg.str());
> }
>
> pthread_exit(NULL);
>
> }
>
> int
> main(int argc, char *argv[]) {
>
> std::vector<pthread_t> threads(NUMTHREADS);
>
> log4cxx::LoggerPtr rootlogger = log4cxx::Logger::getRootLogger();
>
> int thread_number = 0;
> int *thread_cnt = 0;
> while (thread_number++ < NUMTHREADS){
>
> thread_cnt = new int(thread_number);
> pthread_create(&threads[thread_number -1], NULL, Run, (void *)
> thread_cnt);
> }
>
> thread_number = NUMTHREADS;
>
> while (--thread_number >= 0){
> pthread_join(threads[thread_number], NULL);
> }
>
> return 0;
>
> }
> ----------------------------------------------------------------------------
>
> Here is my log4cxx.properties:
>
> log4j.debug=true
>
> # Loggers
> log4j.rootLogger=DEBUG, rootlog
> log4j.logger.ThreadManager=DEBUG, ThreadManager
>
> # Additivity
> log4j.additivity.ThreadManager=false
>
> # rootLogger
> log4j.appender.rootlog.File=root.log
> log4j.appender.rootlog.Append=false
> log4j.appender.rootlog=org.apache.log4j.FileAppender
> log4j.appender.rootlog.layout=org.apache.log4j.PatternLayout
> log4j.appender.rootlog.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
>
> # ThreadManager
> log4j.appender.ThreadManager=org.apache.log4j.FileAppender
> log4j.appender.ThreadManager.File=ThreadManager.log
> log4j.appender.ThreadManager.Append=false
> log4j.appender.ThreadManager.layout=org.apache.log4j.PatternLayout
> log4j.appender.ThreadManager.layout.ConversionPattern=%-4r [%t] %-5p %c %x -
> %m%n
>
>
