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https://issues.apache.org/jira/browse/WICKET-2099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12706064#action_12706064
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Adriano dos Santos Fernandes commented on WICKET-2099:
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Thanks!
> NullPointerException after jetty restart with persistent sessions
> -----------------------------------------------------------------
>
> Key: WICKET-2099
> URL: https://issues.apache.org/jira/browse/WICKET-2099
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.4-RC2
> Reporter: Adriano dos Santos Fernandes
> Assignee: Matej Knopp
>
> I start Jetty with a savePeriod (HashSessionManager) of 4 seconds. When I
> restart it, a NPE is logged each 4s. After some (not all) page loads, the
> exception stop.
> Since NPE is never a feature, I suggest to apply that patch. Or something
> else more appropriate, if you understand the problem better.
> Index:
> wicket/src/main/java/org/apache/wicket/protocol/http/pagestore/DiskPageStore.java
> ===================================================================
> ---
> wicket/src/main/java/org/apache/wicket/protocol/http/pagestore/DiskPageStore.java
> (revisão 740670)
> +++
> wicket/src/main/java/org/apache/wicket/protocol/http/pagestore/DiskPageStore.java
> (cópia de trabalho)
> @@ -1165,7 +1165,7 @@
> else if (page instanceof SerializedPageWithSession)
> {
> SerializedPageWithSession serialized =
> (SerializedPageWithSession)page;
> - if (serialized.page.get() ==
> SerializedPageWithSession.NO_PAGE)
> + if (serialized.page != null && serialized.page.get() ==
> SerializedPageWithSession.NO_PAGE)
> {
> // stripped page, need to restore it first
> result =
> restoreStrippedSerializedPage(serialized);
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