We use apache2 as a frontend to confluence, jira, crowd. Users access the site using https, and we use apache's ProxyPass and ProxyPassReverse to forward requests to ajp connectors in confluence, jira, etc., (we use ajp because the jiraissues confluence macro does not work when using the http connector + ProxyPass)

This configuration works fine in jira 3.13.2.
However, in jira 4.0.0 beta1, the dashboard shows error messages for each gadget (see screenshot).

1) AJP connector
Apache configuration:

    ProxyPass /jira4 ajp://localhost:8111/jira4
    ProxyPassReverse /jira4 ajp://localhost:8111/jira4

Add ajp connector to jira's conf/server.xml:

        <!-- Define an AJP 1.3 Connector on port 8009 -->
            <Connector port="8111"
              enableLookups="false" redirectPort="8443" protocol="AJP/1.3" />

Errors in the log:

2009-06-03 14:56:25,600 TP-Processor1 WARN [directory.internal.impl.GadgetSpecProviderDirectoryEntryProvider] Could not determine whether plugin-provided gadget spec store contains http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:introduction.xml: URL is not a gadget spec URL for this server http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:introduction.xml

2009-06-03 14:56:25,601 TP-Processor3 WARN [directory.internal.impl.GadgetSpecProviderDirectoryEntryProvider] Could not determine whether plugin-provided gadget spec store contains http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:assignedtome.xml: URL is not a gadget spec URL for this server http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:assignedtome.xml

2009-06-03 14:56:25,604 TP-Processor7 WARN [directory.internal.impl.GadgetSpecProviderDirectoryEntryProvider] Could not determine whether plugin-provided gadget spec store contains http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:savedfilters.xml: URL is not a gadget spec URL for this server http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:savedfilters.xml

2009-06-03 14:56:25,606 TP-Processor8 WARN [directory.internal.impl.GadgetSpecProviderDirectoryEntryProvider] Could not determine whether plugin-provided gadget spec store contains http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:projects.xml: URL is not a gadget spec URL for this server http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:projects.xml

2009-06-03 14:56:25,608 TP-Processor3 WARN [directory.internal.impl.GadgetSpecProviderDirectoryEntryProvider] Could not determine whether plugin-provided gadget spec store contains http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:admin.xml: URL is not a gadget spec URL for this server http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:admin.xml

2009-06-03 14:56:25,609 TP-Processor12 WARN [directory.internal.impl.GadgetSpecProviderDirectoryEntryProvider] Could not determine whether plugin-provided gadget spec store contains http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:inprogress.xml: URL is not a gadget spec URL for this server http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:inprogress.xml

2009-06-03 14:56:25,616 TP-Processor5 WARN [directory.internal.impl.GadgetSpecProviderDirectoryEntryProvider] Could not determine whether plugin-provided gadget spec store contains http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:userissues.xml: URL is not a gadget spec URL for this server http://maxim-desktop:8181/jira4/rest/gadget/1.0/legacy/spec/com.atlassian.jira.plugin.system.portlets:userissues.xml

2) If I use the http connector, error messages are still displayed in the dashboard (see screenshot). These are "failed to connect" errors. There are no messages in the logs.

Apache configuration (using http connector):

    ProxyPass /jira4 http://localhost:8181/jira4
    ProxyPassReverse /jira4 http://localhost:8181/jira4