Retry randomUUID() to mitigate intermittent java NativeSeedGenerator …

…failure (#1705)

* Retry once

* Added logging

* Changed logging level

src/main/java/com/microsoft/sqlserver/jdbc/SQLServerConnection.java

@@ -3178,7 +3178,17 @@ private InetSocketAddress connectHelper(ServerPortPlaceHolder serverInfo, int ti
 
         setState(State.Connected);
 
-        clientConnectionId = UUID.randomUUID();
+        try {
+            clientConnectionId = UUID.randomUUID();
+        } catch (InternalError e) {
+            // Java's NativeSeedGenerator can sometimes fail on getSeedBytes(). Exact reason is unknown but high system
+            // load seems to contribute to likelihood. Retry once to mitigate.
+            if (connectionlogger.isLoggable(Level.FINER)) {
+                connectionlogger.finer(toString() + " Generating a random UUID has failed due to : " + e.getMessage() + "Retrying once.");
+            }
+            clientConnectionId = UUID.randomUUID();
+        }
+
         assert null != clientConnectionId;
 
         Prelogin(serverInfo.getServerName(), serverInfo.getPortNumber());