# HG changeset patch
# User Joeri van Ruth <joeri.van.ruth@monetdbsolutions.com>
# Date 1630583464 -7200
# Node ID d3a96675969e21125cda23827ea41e8017fffc10
# Parent  5d524783f7b0e2c927c2beaff0e482f7ce1d9464
Handle case where in.readLine() returns null

diff --git a/src/main/java/org/monetdb/jdbc/MonetConnection.java b/src/main/java/org/monetdb/jdbc/MonetConnection.java
--- a/src/main/java/org/monetdb/jdbc/MonetConnection.java
+++ b/src/main/java/org/monetdb/jdbc/MonetConnection.java
@@ -3148,7 +3148,10 @@ public class MonetConnection
 							// Consume the fake prompt inserted by MapiSocket.
 							String dummy = in.readLine();
 							// Handle the request
-							error = handleTransfer(transferCommand);
+							if (transferCommand != null)
+								error = handleTransfer(transferCommand);
+							else
+								error = "!M0M10!protocol violation, expected transfer command, got nothing";
 							// Then prepare for the next iteration
 							if (error != null) {
 								out.writeLine("!HY000!" + error + "\n");