Truman Lackey created LOGCXX-537:
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Summary: double mutex lock
Key: LOGCXX-537
URL: https://issues.apache.org/jira/browse/LOGCXX-537
Project: Log4cxx
Issue Type: Bug
Components: Appender
Affects Versions: 0.12.1
Environment: Ubuntu 18.04
Reporter: Truman Lackey
There is a possibility of the SocketAppender calling
std::unique_lock<log4cxx::shared_mutex> lock(mutex) twice causing a deadlock
exception. In socketappenderskeleton.cpp connect call if the exception is
caught on line 118 then fireConnector() will be called. On line 160 the mutex
is attempted to be locked again but it has already been locked in the
appendersleketo.cpp doAppend call. This causes log4cxx to throw a
std::err::resource_deadlock_would_occur
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