SIGSEGV: invalid address at stop

[tatouft]

My process exits with code 11. If I run it in the debugger, there is a "SIGSEGV: invalid address".
Here is the call stack:

pthread_join
log4cplus::thread::AbstractThread::join()
log4cplus::AsyncAppender::close()
log4cplus::spi::LoggerImpl::closeNestedAppenders()
log4cplus::Hierarchy::shutdown()
log4cplus::Hierarchy::~Hierarchy()

I have tried to simplify the code and here is what I have:

#include <iostream>
#include <log4cplus/logger.h>
#include <log4cplus/configurator.h>
int main()
{
  log4cplus::PropertyConfigurator config("/tmp/log.txt");
  config.configure();

  return 0;
}

And the config file:

log4cplus.rootLogger=OFF, A1
log4cplus.logger.L1=OFF, A5
log4cplus.logger.L2=OFF, A2
log4cplus.logger.L4=OFF, A3
log4cplus.logger.L6=OFF, A4
log4cplus.logger.L7=OFF, A1

log4cplus.appender.A1=log4cplus::AsyncAppender
log4cplus.appender.A1.Appender=log4cplus::ConsoleAppender

log4cplus.appender.A2=log4cplus::AsyncAppender
log4cplus.appender.A2.Appender=log4cplus::ConsoleAppender

log4cplus.appender.A3=log4cplus::AsyncAppender
log4cplus.appender.A3.Appender=log4cplus::ConsoleAppender

log4cplus.appender.A4=log4cplus::AsyncAppender
log4cplus.appender.A4.Appender=log4cplus::ConsoleAppender

log4cplus.appender.A5=log4cplus::AsyncAppender
log4cplus.appender.A5.Appender=log4cplus::ConsoleAppender

If I change the logger name L7 to L6, I don't have an error anymore.
Actually, if I delete any configuration line, I don't have an error anymore but I noticed that the name of my logger L7 worried.

I use log4cplus 1.1.3-0.4.rc3 on centos7

[wilx]

Please try to modify the code and add log4cplus::Logger::shutdown(); before the return statement in your main().

[tatouft]

I did but the error is still there, during shutdown call. I also tried to isolate the configurator into a block to be sure that the AppenderMap (contained in the configurator) was destructed before the call to shutdown but it didn't change anything.

[tatouft]

I have test with log4cplus 1.2.0 and I have the same problem.

[tatouft]

I fixed this adding one line in AsyncAppender::close method:

if(queue_thread->isRunning())

just before join call.

[wilx]

I do no entirely understand why this is happening but adding the condition before the close() call seems like something that should be there anyway. This is because if for some reason the thread is shut down in AsyncAppender::append() then without the conditional it will access NULL pointer.

[wilx]

I have added the suggested fix to all active branches.