bug 1362: properly initialise Log4Cplus in every thread

LCS/Common/include/Common/LofarLog4Cplus.h

@@ -444,6 +444,9 @@ inline LoggerReference&	getLogger() { return theirTraceLoggerRef; }
 
 // @}
 
+  // initialise a new NDC (required when creating a new thread)
+  void initNDC();
+
   // Initialize Log4cplus. 
   // \param propFile Name of the properties file. A missing \c ".log_prop"
   // extension will automatically be added. Note that \a propFile is

LCS/Common/include/Common/Thread/Thread.h

@@ -158,6 +158,10 @@ template <typename T> inline void Thread::stub(Args<T> *args)
   // can be reused once the thread finishes.
   Cancellation::ScopedRegisterThread rt;
 
+#ifdef HAVE_LOG4CPLUS
+  initNDC();
+#endif
+
   try {
     (args->object->*args->method)();
   } catch (Exception &ex) {

LCS/Common/src/LofarLog4Cplus.cc

@@ -9,6 +9,14 @@ using namespace log4cplus;
 
 namespace LOFAR
 {
+  // Create an NDC (nested diagnostic context) with the text
+  // "application@node" and push it onto the NDC stack.
+  void initNDC(void)
+  {
+    string loggerId(basename(getExecutablePath()) + "@" + myHostname(false));
+    log4cplus::getNDC().push(loggerId);
+  }
+
   namespace
   {
     // Define the eight trace log levels
@@ -58,14 +66,6 @@ namespace LOFAR
       return NOT_SET_LOG_LEVEL;   // not found
     }
 
-    // Create an NDC (nested diagnostic context) with the text
-    // "application@node" and push it onto the NDC stack.
-    void initNDC(void)
-    {
-      string loggerId(basename(getExecutablePath()) + "@" + myHostname(false));
-      log4cplus::getNDC().push(loggerId);
-    }
-
     // Function that is used when the TRACE levels are NOT compiled out. It
     // registers the TRACEn management routines at the Log4Cplus
     // LogLevelManager and sets up the global trace-logger named "TRC", with