Add more log messages for API connections

refs #6066

lib/remote/apiclient.cpp

@@ -175,11 +175,11 @@ void ApiClient::MessageThreadProc(void)
 	try {
 		while (ProcessMessage())
 			; /* empty loop body */
-
-		Disconnect();
 	} catch (const std::exception& ex) {
 		Log(LogWarning, "ApiClient", "Error while reading JSON-RPC message for identity '" + m_Identity + "': " + DiagnosticInformation(ex));
 	}
+
+	Disconnect();
 }
 
 Value SetLogPositionHandler(const MessageOrigin& origin, const Dictionary::Ptr& params)

lib/remote/apilistener.cpp

@@ -231,6 +231,8 @@ void ApiListener::AddConnection(const Endpoint::Ptr& endpoint)
 	String host = endpoint->GetHost();
 	String port = endpoint->GetPort();
 
+	Log(LogWarning, "ApiClient", "Reconnecting to API endpoint '" + endpoint->GetName() + "' via host '" + host + "' and port " + port);
+
 	TcpSocket::Ptr client = make_shared<TcpSocket>();
 
 	try {

lib/remote/endpoint.cpp

@@ -24,6 +24,7 @@
 #include "base/dynamictype.hpp"
 #include "base/utility.hpp"
 #include "base/exception.hpp"
+#include "base/convert.hpp"
 #include <boost/foreach.hpp>
 
 using namespace icinga;
@@ -79,6 +80,8 @@ void Endpoint::RemoveClient(const ApiClient::Ptr& client)
 	{
 		boost::mutex::scoped_lock lock(m_ClientsLock);
 		m_Clients.erase(client);
+
+		Log(LogWarning, "ApiListener", "Removing API client for endpoint '" + GetName() + "'. " + Convert::ToString(m_Clients.size()) + " API clients left.");
 	}
 
 	bool is_master = ApiListener::GetInstance()->IsMaster();