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-rw-r--r--server/src/com/vaadin/server/communication/MetadataWriter.java3
1 files changed, 2 insertions, 1 deletions
diff --git a/server/src/com/vaadin/server/communication/MetadataWriter.java b/server/src/com/vaadin/server/communication/MetadataWriter.java
index 5ad7186c24..bae06f5763 100644
--- a/server/src/com/vaadin/server/communication/MetadataWriter.java
+++ b/server/src/com/vaadin/server/communication/MetadataWriter.java
@@ -77,7 +77,8 @@ public class MetadataWriter implements Serializable {
// sessionExpiredURL after timer expires.
if (messages != null && messages.getSessionExpiredMessage() == null
&& messages.getSessionExpiredCaption() == null
- && messages.isSessionExpiredNotificationEnabled()) {
+ && messages.isSessionExpiredNotificationEnabled()
+ && ui.getSession().getSession() != null) {
int newTimeoutInterval = ui.getSession().getSession()
.getMaxInactiveInterval();
if (repaintAll || (timeoutInterval != newTimeoutInterval)) {