Rakesh Sehgal created LOGCXX-441:
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Summary: Log4cxx SocketAppender leads to application crash
Key: LOGCXX-441
URL: https://issues.apache.org/jira/browse/LOGCXX-441
Project: Log4cxx
Issue Type: Bug
Components: Appender
Affects Versions: 0.10.0
Environment: CentOS, RHEL, C++11
Reporter: Rakesh Sehgal
Fix For: 0.11.0
I am using log4cxx and recently started working with SocketAppender. I use the
following:
java org.apache.log4j.net.SimpleSocketServer 4712 log4j-server.properties
and am able to write logs on the server. I do also have a local SizeRollover
policy setup. This all works fine, until I stop running the SimpleSockerServer.
At which point my C++ application crashes, I think after the
ReconnectionDelayTime specified in the properties file.
Below is the gdb output from crash:
0 0x0000003c5fa0e6fd in write () from /lib64/libpthread.so.0
1 0x00007ffff79eade7 in apr_socket_send () from /usr/lib64/libapr-1.so.0
2 0x00007ffff7d52bb1 in
log4cxx::helpers::Socket::write(log4cxx::helpers::ByteBuffer&) () from
/usr/lib64/liblog4cxx.so.10
3 0x00007ffff7d595ed in
log4cxx::helpers::SocketOutputStream::flush(log4cxx::helpers::Pool&) () from
/usr/lib64/liblog4cxx.so.10
4 0x00007ffff7d5468c in
log4cxx::net::SocketAppender::append(log4cxx::helpers::ObjectPtrT const&,
log4cxx::helpers::Pool&) () from /usr/lib64/liblog4cxx.so.10
5 0x00007ffff7cd7d9d in
log4cxx::AppenderSkeleton::doAppend(log4cxx::helpers::ObjectPtrT const&,
log4cxx::helpers::Pool&) () from /usr/lib64/liblog4cxx.so.10
6 0x00007ffff7cd50f4 in
log4cxx::helpers::AppenderAttachableImpl::appendLoopOnAppenders(log4cxx::helpers::ObjectPtrT
const&, log4cxx::helpers::Pool&) () from /usr/lib64/liblog4cxx.so.10
7 0x00007ffff7d1adfd in
log4cxx::Logger::callAppenders(log4cxx::helpers::ObjectPtrT const&,
log4cxx::helpers::Pool&) const () from /usr/lib64/liblog4cxx.so.10
8 0x00007ffff7d1c4ac in log4cxx::Logger::forcedLog(log4cxx::helpers::ObjectPtrT
const&, std::basic_string, std::allocator > const&, log4cxx::spi::LocationInfo
const&) const () from /usr/lib64/liblog4cxx.so.10`
As an improvement, Is it possible to make log4cxx write logs to a local file in
case the server stops? If I start the server again, before the application
crashes, SocketAppender does not receive the logs again. Any other suggestions
to send logs over the network?
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