merge error

python/core/auto_generated/qgsapplication.sip.in

@@ -791,12 +791,23 @@ Do not include generated variables (like system name, user name etc.)
 .. versionadded:: 3.0
 %End
 
-
     static void setCustomVariable( const QString &name, const QVariant &value );
 %Docstring
 Set a single custom expression variable.
 
 .. versionadded:: 3.0
+%End
+
+    int maxConcurrentConnectionsPerPool() const;
+%Docstring
+The maximum number of concurrent connections per connections pool.
+
+.. note::
+
+   QGIS may in some situations allocate more than this amount
+   of connections to avoid deadlocks.
+
+.. versionadded:: 3.4
 %End
 
     void collectTranslatableObjects( QgsTranslationContext *translationContext );

src/core/qgsapplication.h

@@ -725,14 +725,23 @@ class CORE_EXPORT QgsApplication : public QApplication
      */
     static void setCustomVariables( const QVariantMap &customVariables );
 
-
     /**
      * Set a single custom expression variable.
      *
      * \since QGIS 3.0
      */
     static void setCustomVariable( const QString &name, const QVariant &value );
 
+    /**
+     * The maximum number of concurrent connections per connections pool.
+     *
+     * \note QGIS may in some situations allocate more than this amount
+     *       of connections to avoid deadlocks.
+     *
+     * \since QGIS 3.4
+     */
+    int maxConcurrentConnectionsPerPool() const;
+
     /**
      * Emits the signal to collect all the strings of .qgs to be included in ts file
      *