ndb - bug#20683

  part 2 - handle safecounter.init() failing in all parts of event code


storage/ndb/src/kernel/blocks/dbdict/Dbdict.cpp:
  Handle out safecounter.init() failing
storage/ndb/src/kernel/blocks/suma/Suma.cpp:
  Dont try to get table RNIL
storage/ndb/test/ndbapi/test_event.cpp:
  Add testcase for subscribe/unscubscribe

storage/ndb/src/kernel/blocks/dbdict/Dbdict.cpp

@@ -9476,7 +9476,14 @@ Dbdict::createEventComplete_RT_USER_GET(Signal* signal,
 
   NodeReceiverGroup rg(DBDICT, c_aliveNodes);
   RequestTracker & p = evntRecPtr.p->m_reqTracker;
-  p.init<CreateEvntRef>(c_counterMgr, rg, GSN_CREATE_EVNT_REF, evntRecPtr.i);
+  if (!p.init<CreateEvntRef>(c_counterMgr, rg, GSN_CREATE_EVNT_REF, 
+			     evntRecPtr.i))
+  {
+    jam();
+    evntRecPtr.p->m_errorCode = 701;
+    createEvent_sendReply(signal, evntRecPtr);
+    return;
+  }
 
   sendSignal(rg, GSN_CREATE_EVNT_REQ, signal, CreateEvntReq::SignalLength, JBB);
 }
@@ -9764,8 +9771,12 @@ void Dbdict::execSUB_START_REQ(Signal* signal)
     return;
   }
   OpSubEventPtr subbPtr;
+  Uint32 errCode = 0;
   if (!c_opSubEvent.seize(subbPtr)) {
+    errCode = SubStartRef::Busy;
+busy:
     SubStartRef * ref = (SubStartRef *)signal->getDataPtrSend();
+
     { // fix
       Uint32 subcriberRef = ((SubStartReq*)signal->getDataPtr())->subscriberRef;
       ref->subscriberRef = subcriberRef;
@@ -9775,7 +9786,7 @@ void Dbdict::execSUB_START_REQ(Signal* signal)
     //      ret->setErrorLine(__LINE__);
     //      ret->setErrorNode(reference());
     ref->senderRef = reference();
-    ref->errorCode = SubStartRef::Busy;
+    ref->errorCode = errCode;
 
     sendSignal(origSenderRef, GSN_SUB_START_REF, signal,
 	       SubStartRef::SignalLength2, JBB);
@@ -9798,7 +9809,12 @@ void Dbdict::execSUB_START_REQ(Signal* signal)
     subbPtr.p->m_senderRef = origSenderRef; // not sure if API sets correctly
     NodeReceiverGroup rg(DBDICT, c_aliveNodes);
     RequestTracker & p = subbPtr.p->m_reqTracker;
-    p.init<SubStartRef>(c_counterMgr, rg, GSN_SUB_START_REF, subbPtr.i);
+    if (!p.init<SubStartRef>(c_counterMgr, rg, GSN_SUB_START_REF, subbPtr.i))
+    {
+      c_opSubEvent.release(subbPtr);
+      errCode = SubStartRef::Busy;
+      goto busy;
+    }
     
     SubStartReq* req = (SubStartReq*) signal->getDataPtrSend();
     
@@ -9988,14 +10004,17 @@ void Dbdict::execSUB_STOP_REQ(Signal* signal)
     return;
   }
   OpSubEventPtr subbPtr;
+  Uint32 errCode = 0;
   if (!c_opSubEvent.seize(subbPtr)) {
+    errCode = SubStopRef::Busy;
+busy:
     SubStopRef * ref = (SubStopRef *)signal->getDataPtrSend();
     jam();
     //      ret->setErrorCode(SubStartRef::SeizeError);
     //      ret->setErrorLine(__LINE__);
     //      ret->setErrorNode(reference());
     ref->senderRef = reference();
-    ref->errorCode = SubStopRef::Busy;
+    ref->errorCode = errCode;
 
     sendSignal(origSenderRef, GSN_SUB_STOP_REF, signal,
 	       SubStopRef::SignalLength, JBB);
@@ -10020,10 +10039,16 @@ void Dbdict::execSUB_STOP_REQ(Signal* signal)
     subbPtr.p->m_senderRef = origSenderRef; // not sure if API sets correctly
     NodeReceiverGroup rg(DBDICT, c_aliveNodes);
     RequestTracker & p = subbPtr.p->m_reqTracker;
-    p.init<SubStopRef>(c_counterMgr, rg, GSN_SUB_STOP_REF, subbPtr.i);
-
+    if (!p.init<SubStopRef>(c_counterMgr, rg, GSN_SUB_STOP_REF, subbPtr.i))
+    {
+      jam();
+      c_opSubEvent.release(subbPtr);
+      errCode = SubStopRef::Busy;
+      goto busy;
+    }
+    
     SubStopReq* req = (SubStopReq*) signal->getDataPtrSend();
-
+    
     req->senderRef  = reference();
     req->senderData = subbPtr.i;
     
@@ -10313,9 +10338,14 @@ Dbdict::dropEventUTIL_EXECUTE_READ(Signal* signal,
 
   NodeReceiverGroup rg(DBDICT, c_aliveNodes);
   RequestTracker & p = evntRecPtr.p->m_reqTracker;
-  p.init<SubRemoveRef>(c_counterMgr, rg, GSN_SUB_REMOVE_REF,
-						evntRecPtr.i);
-
+  if (!p.init<SubRemoveRef>(c_counterMgr, rg, GSN_SUB_REMOVE_REF,
+			    evntRecPtr.i))
+  {
+    evntRecPtr.p->m_errorCode = 701;
+    dropEvent_sendReply(signal, evntRecPtr);
+    return;
+  }
+  
   SubRemoveReq* req = (SubRemoveReq*) signal->getDataPtrSend();
 
   req->senderRef       = reference();

storage/ndb/src/kernel/blocks/suma/Suma.cpp

@@ -2465,7 +2465,8 @@ Suma::execSUB_STOP_REQ(Signal* signal){
 
   TablePtr tabPtr;
   tabPtr.i = subPtr.p->m_table_ptrI;
-  if (!(tabPtr.p = c_tables.getPtr(tabPtr.i)) ||
+  if (tabPtr.i == RNIL ||
+      !(tabPtr.p = c_tables.getPtr(tabPtr.i)) ||
       tabPtr.p->m_tableId != subPtr.p->m_tableId)
   {
     jam();

storage/ndb/test/ndbapi/test_event.cpp

@@ -1559,6 +1559,56 @@ static int runCreateDropNR(NDBT_Context* ctx, NDBT_Step* step)
   DBUG_RETURN(result);
 }
 
+static
+int
+runSubscribeUnsubscribe(NDBT_Context* ctx, NDBT_Step* step)
+{
+  char buf[1024];
+  const NdbDictionary::Table & tab = * ctx->getTab();
+  sprintf(buf, "%s_EVENT", tab.getName());
+  Ndb* ndb = GETNDB(step);
+  int loops = 5 * ctx->getNumLoops();
+
+  while (--loops)
+  {
+    NdbEventOperation *pOp= ndb->createEventOperation(buf);
+    if (pOp == 0)
+    {
+      g_err << "createEventOperation: "
+	    << ndb->getNdbError().code << " "
+	    << ndb->getNdbError().message << endl;
+      return NDBT_FAILED;
+    }
+    
+    int n_columns= tab.getNoOfColumns();
+    for (int j = 0; j < n_columns; j++)
+    {
+      pOp->getValue(tab.getColumn(j)->getName());
+      pOp->getPreValue(tab.getColumn(j)->getName());
+    }
+    if ( pOp->execute() )
+    {
+      g_err << "pOp->execute(): "
+	    << pOp->getNdbError().code << " "
+	    << pOp->getNdbError().message << endl;
+      
+      ndb->dropEventOperation(pOp);
+      
+      return NDBT_FAILED;
+    }
+    
+    if (ndb->dropEventOperation(pOp))
+    {
+      g_err << "pOp->execute(): "
+	    << ndb->getNdbError().code << " "
+	    << ndb->getNdbError().message << endl;
+      return NDBT_FAILED;
+    }
+  }
+  
+  return NDBT_OK;
+}
+
 NDBT_TESTSUITE(test_event);
 TESTCASE("BasicEventOperation", 
 	 "Verify that we can listen to Events"
@@ -1673,6 +1723,13 @@ TESTCASE("CreateDropNR",
 	 "NOTE! No errors are allowed!" ){
   FINALIZER(runCreateDropNR);
 }
+TESTCASE("SubscribeUnsubscribe", 
+	 "A bunch of threads doing subscribe/unsubscribe in loop"
+	 "NOTE! No errors are allowed!" ){
+  INITIALIZER(runCreateEvent);
+  STEPS(runSubscribeUnsubscribe, 16);
+  FINALIZER(runDropEvent);
+}
 NDBT_TESTSUITE_END(test_event);
 
 int main(int argc, const char** argv){