Valentin Valchev created FELIX-4572:
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Summary: Web Console may cause NPE on refresh packages
Key: FELIX-4572
URL: https://issues.apache.org/jira/browse/FELIX-4572
Project: Felix
Issue Type: Bug
Components: Web Console
Affects Versions: webconsole-4.2.2
Reporter: Valentin Valchev
Priority: Trivial
If you try to refresh packages on the webconsole or it's dependencies (like the
fileupload) bundle, the following exception will be printed in the log file:
{code}
[ERROR]8 : [HTTP] Problem while making answer to request
/system/console/bundles/19 from client address 127.0.0.1:63063
java.lang.NullPointerException
at org.osgi.util.tracker.ServiceTracker.<init>(ServiceTracker.java:207)
at
org.apache.felix.webconsole.SimpleWebConsolePlugin.getService(SimpleWebConsolePlugin.java:196)
at
org.apache.felix.webconsole.internal.core.BundlesServlet.getPackageAdmin(BundlesServlet.java:1403)
at
org.apache.felix.webconsole.internal.core.BundlesServlet.isFragmentBundle(BundlesServlet.java:715)
at
org.apache.felix.webconsole.internal.core.BundlesServlet.doPost(BundlesServlet.java:358)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:815)
at
org.apache.felix.webconsole.internal.servlet.OsgiManager.service(OsgiManager.java:493)
at
org.apache.felix.webconsole.internal.servlet.OsgiManager.service(OsgiManager.java:418)
{code}
The reason is that the refresh will cause the webconsole bundle to be
restarted. Here is what happens:
# doPost entered
# sent package refresh
# webconsole bundle is stopped
# web console tries to access a service
# NPE
# doPost leaving
To prevent that, the bundle plugin should simply check if the bundleContext is
null
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