BUG#11898 ndb_mgmd not releasing resources, added "ping" on add_listener

      + added close of some fd's
      + debug prints

ndb/src/mgmclient/CommandInterpreter.cpp

@@ -455,11 +455,13 @@ static int do_event_thread;
 static void*
 event_thread_run(void* m)
 {
+  DBUG_ENTER("event_thread_run");
+
   NdbMgmHandle handle= *(NdbMgmHandle*)m;
 
   int filter[] = { 15, NDB_MGM_EVENT_CATEGORY_BACKUP, 0 };
   int fd = ndb_mgm_listen_event(handle, filter);
-  if (fd > 0)
+  if (fd != NDB_INVALID_SOCKET)
   {
     do_event_thread= 1;
     char *tmp= 0;
@@ -468,20 +470,26 @@ event_thread_run(void* m)
     do {
       if (tmp == 0) NdbSleep_MilliSleep(10);
       if((tmp = in.gets(buf, 1024)))
+      {
+	const char ping_token[]= "<PING>";
+	if (memcmp(ping_token,tmp,sizeof(ping_token)-1))
 	  ndbout << tmp;
+      }
     } while(do_event_thread);
+    NDB_CLOSE_SOCKET(fd);
   }
   else
   {
     do_event_thread= -1;
   }
 
-  return NULL;
+  DBUG_RETURN(NULL);
 }
 
 bool
 CommandInterpreter::connect() 
 {
+  DBUG_ENTER("CommandInterpreter::connect");
   if(!m_connected)
   {
     if(!ndb_mgm_connect(m_mgmsrv, try_reconnect-1, 5, 1))
@@ -512,8 +520,19 @@ CommandInterpreter::connect()
 	    do_event_thread == 0 ||
 	    do_event_thread == -1)
 	{
-	  printf("Warning, event thread startup failed, degraded printouts as result\n");
+	  DBUG_PRINT("info",("Warning, event thread startup failed, "
+			     "degraded printouts as result, errno=%d",
+			     errno));
+	  printf("Warning, event thread startup failed, "
+		 "degraded printouts as result, errno=%d\n", errno);
 	  do_event_thread= 0;
+	  if (m_event_thread)
+	  {
+	    void *res;
+	    NdbThread_WaitFor(m_event_thread, &res);
+	    NdbThread_Destroy(&m_event_thread);
+	  }
+	  ndb_mgm_disconnect(m_mgmsrv2);
 	}
       }
       else
@@ -521,6 +540,8 @@ CommandInterpreter::connect()
 	printf("Warning, event connect failed, degraded printouts as result\n");
       }
       m_connected= true;
+      DBUG_PRINT("info",("Connected to Management Server at: %s:%d",
+			 host,port));
       if (m_verbose)
       {
 	printf("Connected to Management Server at: %s:%d\n",
@@ -528,12 +549,13 @@ CommandInterpreter::connect()
       }
     }
   }
-  return m_connected;
+  DBUG_RETURN(m_connected);
 }
 
 bool 
 CommandInterpreter::disconnect() 
 {
+  DBUG_ENTER("CommandInterpreter::disconnect");
   if (m_event_thread) {
     void *res;
     do_event_thread= 0;
@@ -550,7 +572,7 @@ CommandInterpreter::disconnect()
     }
     m_connected= false;
   }
-  return true;
+  DBUG_RETURN(true);
 }
 
 //*****************************************************************************

ndb/src/mgmsrv/MgmtSrvr.hpp

@@ -60,6 +60,7 @@ public:
   }
   
   void add_listener(const Event_listener&);
+  void check_listeners();
   void update_max_log_level(const LogLevel&);
   void update_log_level(const LogLevel&);
   

ndb/src/mgmsrv/Services.cpp

@@ -253,15 +253,19 @@ ParserRow<MgmApiSession> commands[] = {
 };
 
 MgmApiSession::MgmApiSession(class MgmtSrvr & mgm, NDB_SOCKET_TYPE sock)
-  : SocketServer::Session(sock), m_mgmsrv(mgm) {
+  : SocketServer::Session(sock), m_mgmsrv(mgm)
+{
+  DBUG_ENTER("MgmApiSession::MgmApiSession");
   m_input = new SocketInputStream(sock);
   m_output = new SocketOutputStream(sock);
   m_parser = new Parser_t(commands, *m_input, true, true, true);
   m_allocated_resources= new MgmtSrvr::Allocated_resources(m_mgmsrv);
+  DBUG_VOID_RETURN;
 }
 
 MgmApiSession::~MgmApiSession()
 {
+  DBUG_ENTER("MgmApiSession::~MgmApiSession");
   if (m_input)
     delete m_input;
   if (m_output)
@@ -270,10 +274,19 @@ MgmApiSession::~MgmApiSession()
     delete m_parser;
   if (m_allocated_resources)
     delete m_allocated_resources;
+  if(m_socket != NDB_INVALID_SOCKET)
+  {
+    NDB_CLOSE_SOCKET(m_socket);
+    m_socket= NDB_INVALID_SOCKET;
+  }
+  DBUG_VOID_RETURN;
 }
 
 void
-MgmApiSession::runSession() {
+MgmApiSession::runSession()
+{
+  DBUG_ENTER("MgmApiSession::runSession");
+
   Parser_t::Context ctx;
   while(!m_stop) {
     m_parser->run(ctx, *this);
@@ -301,8 +314,13 @@ MgmApiSession::runSession() {
       break;
     }
   }
-  if(m_socket >= 0)
+  if(m_socket != NDB_INVALID_SOCKET)
+  {
     NDB_CLOSE_SOCKET(m_socket);
+    m_socket= NDB_INVALID_SOCKET;
+  }
+
+  DBUG_VOID_RETURN;
 }
 
 #ifdef MGM_GET_CONFIG_BACKWARDS_COMPAT
@@ -1236,7 +1254,7 @@ Ndb_mgmd_event_service::log(int eventType, const Uint32* theData, NodeId nodeId)
   Uint32 threshold;
   LogLevel::EventCategory cat;
   Logger::LoggerLevel severity;
-  int i;
+  int i, n;
   DBUG_ENTER("Ndb_mgmd_event_service::log");
   DBUG_PRINT("enter",("eventType=%d, nodeid=%d", eventType, nodeId));
 
@@ -1248,28 +1266,30 @@ Ndb_mgmd_event_service::log(int eventType, const Uint32* theData, NodeId nodeId)
 
   Vector<NDB_SOCKET_TYPE> copy; 
   m_clients.lock();
-  for(i = m_clients.size() - 1; i >= 0; i--){
-    if(threshold <= m_clients[i].m_logLevel.getLogLevel(cat)){
-      if(m_clients[i].m_socket != NDB_INVALID_SOCKET &&
-	 println_socket(m_clients[i].m_socket, 
-			MAX_WRITE_TIMEOUT, m_text) == -1){
-	copy.push_back(m_clients[i].m_socket);
+  for(i = m_clients.size() - 1; i >= 0; i--)
+  {
+    if(threshold <= m_clients[i].m_logLevel.getLogLevel(cat))
+    {
+      int fd= m_clients[i].m_socket;
+      if(fd != NDB_INVALID_SOCKET &&
+	 println_socket(fd, MAX_WRITE_TIMEOUT, m_text) == -1)
+      {
+	copy.push_back(fd);
 	m_clients.erase(i, false);
       }
     }
   }
   m_clients.unlock();
   
-  for(i = 0; (unsigned)i < copy.size(); i++){
+  if ((n= (int)copy.size()))
+  {
+    for(i= 0; i < n; i++)
       NDB_CLOSE_SOCKET(copy[i]);
-  }
 
-  if(copy.size()){
     LogLevel tmp; tmp.clear();
     m_clients.lock();
-    for(i = 0; (unsigned)i < m_clients.size(); i++){
+    for(i= m_clients.size() - 1; i >= 0; i--)
       tmp.set_max(m_clients[i].m_logLevel);
-    }
     m_clients.unlock();
     update_log_level(tmp);
   }
@@ -1297,9 +1317,48 @@ Ndb_mgmd_event_service::update_log_level(const LogLevel &tmp)
 }
 
 void
-Ndb_mgmd_event_service::add_listener(const Event_listener& client){
+Ndb_mgmd_event_service::check_listeners()
+{
+  int i, n= 0;
+  DBUG_ENTER("Ndb_mgmd_event_service::check_listeners");
+  m_clients.lock();
+  for(i= m_clients.size() - 1; i >= 0; i--)
+  {
+    int fd= m_clients[i].m_socket;
+    DBUG_PRINT("info",("%d %d",i,fd));
+    char buf[1];
+    buf[0]=0;
+    if (fd != NDB_INVALID_SOCKET &&
+	println_socket(fd,MAX_WRITE_TIMEOUT,"<PING>") == -1)
+    {
+      NDB_CLOSE_SOCKET(fd);
+      m_clients.erase(i, false);
+      n=1;
+    }
+  }
+  if (n)
+  {
+    LogLevel tmp; tmp.clear();
+    for(i= m_clients.size() - 1; i >= 0; i--)
+      tmp.set_max(m_clients[i].m_logLevel);
+    update_log_level(tmp);
+  }
+  m_clients.unlock();
+  DBUG_VOID_RETURN;
+}
+
+void
+Ndb_mgmd_event_service::add_listener(const Event_listener& client)
+{
+  DBUG_ENTER("Ndb_mgmd_event_service::add_listener");
+  DBUG_PRINT("enter",("client.m_socket: %d", client.m_socket));
+
+  check_listeners();
+
   m_clients.push_back(client);
   update_max_log_level(client.m_logLevel);
+
+  DBUG_VOID_RETURN;
 }
 
 void