Aleksy Wróblewski created KARAF-7804:
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Summary: Cannot register more than one HTTP proxy
Key: KARAF-7804
URL: https://issues.apache.org/jira/browse/KARAF-7804
Project: Karaf
Issue Type: Bug
Components: karaf
Reporter: Aleksy Wróblewski
When you register more than one proxy into ProxyService, it crashes with the
following exception:
{code:java}
org.osgi.service.http.NamespaceException:
ServletModel{id=ServletModel-49,name='org.apache.karaf.http.core.internal.proxy.ProxyServlet',alias='/kb',urlPatterns=[/kb/*],servlet=org.apache.karaf.http.core.internal.proxy.ProxyServlet@6bad2ac1,contexts=[
{HS,OCM-48,default,/}]} can't be registered.
ServletContextModel\{id=ServletContextModel-2,contextPath='/'} already contains
servlet named org.apache.karaf.http.core.internal.proxy.ProxyServlet:
ServletModel{id=ServletModel-47,name='org.apache.karaf.http.core.internal.proxy.ProxyServlet',alias='/webconsole',urlPatterns=[/webconsole/*],servlet=org.apache.karaf.http.core.internal.proxy.ProxyServlet@4ce53d9c,contexts=[\{HS,OCM-48,default,/}
]}
{code}
The important part: *already* *contains servlet named
org.apache.karaf.http.core.internal.proxy.ProxyServlet*
This is because servlet-name is not specified when registering a new
ProxyServlet into HttpService. So PAX-WEB defaults to the fully qualified class
name, as specified in HTTP whiteboard spec section 140.4.
([https://docs.osgi.org/specification/osgi.cmpn/7.0.0/service.http.whiteboard.html#service.http.whiteboard-i21223311).]
But the class name is the same for subsequent Servlets, so there is a conflict.
This is also easy to see when you modify
org.apache.karaf.itests.HttpTest.testProxy to register two proxies and check if
both are registered:
{code:java}
@Test
public void testProxy() throws Exception {
executeCommand("http:proxy-add /test1 http://karaf.apache.org";);
executeCommand("http:proxy-add /test2 http://karaf.apache.org";); // not added
String output = executeCommand("http:proxy-balancing-list");
System.out.println(output);
assertContains("random", output);
assertContains("round-robin", output);
output = executeCommand("http:proxy-list");
System.out.println(output);
assertContains("/test1", output);
assertContains("/test2", output); // fails
}
{code}
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