Fixed CORE-6441: Srp plugin keeps connection after database has been removed for ~10 seconds (SS and SC)

src/auth/SecDbCache.cpp

@@ -71,13 +71,23 @@ void PluginDatabases::getInstance(IPluginConfig* pluginConfig, RefPtr<CachedSecu
 
 	{ // guard scope
 		MutexLockGuard g(arrayMutex, FB_FUNCTION);
-		for (unsigned int i = 0; i < dbArray.getCount(); ++i)
+		for (unsigned int i = 0; i < dbArray.getCount(); )
 		{
 			if (secDbName == dbArray[i]->secureDbName)
 			{
-				instance = dbArray[i];
-				break;
+				CachedSecurityDatabase* fromCache = dbArray[i];
+				if (fromCache->secDb->test())
+				{
+					instance = fromCache;
+					break;
+				}
+				else
+				{
+					dbArray.remove(i);
+					continue;
+				}
 			}
+			++i;
 		}
 
 		if (!instance)
@@ -147,7 +157,7 @@ void PluginDatabases::handler(CachedSecurityDatabase* tgt)
 		const ISC_STATUS* status = st.begin();
 		if (status[0] == 1 && status[1] != isc_att_shutdown)
 		{
-			iscLogStatus("Legacy security database timer handler", status);
+			iscLogStatus("Security database timer handler", status);
 		}
 	}
 }

src/auth/SecDbCache.h

@@ -49,6 +49,7 @@ public:
 	}
 
 	virtual bool lookup(void* inMsg, void* outMsg) = 0;
+	virtual bool test() = 0;
 };
 
 

src/auth/SecureRemotePassword/server/SrpServer.cpp

@@ -109,7 +109,8 @@ protected:
 class SecurityDatabase : public VSecDb
 {
 public:
-	bool lookup(void* inMsg, void* outMsg)
+	// VSecDb implementation
+	bool lookup(void* inMsg, void* outMsg) override
 	{
 		FbLocalStatus status;
 
@@ -120,6 +121,14 @@ public:
 		return false;	// safe default
 	}
 
+	bool test() override
+	{
+		FbLocalStatus status;
+
+		att->ping(&status);
+		return !(status->getState() & IStatus::STATE_ERRORS);
+	}
+
 	// This 2 are needed to satisfy temporarily different calling requirements
 	static int shutdown(const int, const int, void*)
 	{

src/auth/SecurityDatabase/LegacyServer.cpp

@@ -146,7 +146,12 @@ private:
 class SecurityDatabase : public VSecDb
 {
 public:
-	bool lookup(void* inMsg, void* outMsg);
+	bool lookup(void* inMsg, void* outMsg) override;
+
+	bool test() override
+	{
+		return fb_ping(status, &lookup_db) == FB_SUCCESS;
+	}
 
 	// This 2 are needed to satisfy temporarily different calling requirements
 	static int shutdown(const int, const int, void*)

src/jrd/ExtEngineManager.cpp

@@ -603,8 +603,6 @@ ExtEngineManager::ExternalContextImpl::ExternalContextImpl(thread_db* tdbb,
 
 	clientCharSet = INTL_charset_lookup(tdbb, internalAttachment->att_client_charset)->getName();
 
-	internalAttachment->getStable()->addRef();
-
 	externalAttachment = MasterInterfacePtr()->registerAttachment
 		(internalAttachment->getProvider(), internalAttachment->getInterface());
 }