Unable to login to Crowd due to java.net.UnknownHostException

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Problem

Users can't login into Crowd. The following appears in the atlassian-crowd.log:

2014-12-18 14:40:39,391 http-bio-8095-exec-8 ERROR [crowd.integration.springsecurity.CrowdSSOAuthenticationProcessingFilter] Unable to unset Crowd SSO token
org.codehaus.xfire.XFireRuntimeException: Could not invoke service.. Nested exception is org.codehaus.xfire.fault.XFireFault: Couldn't send message.
org.codehaus.xfire.fault.XFireFault: Couldn't send message.
    at org.codehaus.xfire.fault.XFireFault.createFault(XFireFault.java:89)
    at org.codehaus.xfire.handler.OutMessageSender.invoke(OutMessageSender.java:30)
    at org.codehaus.xfire.handler.HandlerPipeline.invoke(HandlerPipeline.java:131)
    at org.codehaus.xfire.client.Invocation.invoke(Invocation.java:79)
    at org.codehaus.xfire.client.Invocation.invoke(Invocation.java:114)
    at org.codehaus.xfire.client.Client.invoke(Client.java:336)
    at org.codehaus.xfire.client.XFireProxy.handleRequest(XFireProxy.java:77)
    at org.codehaus.xfire.client.XFireProxy.invoke(XFireProxy.java:57)
    at com.sun.proxy.$Proxy446.authenticateApplication(Unknown Source)
    at com.atlassian.crowd.service.soap.client.SecurityServerClientImpl.authenticate(SecurityServerClientImpl.java:235)
    at com.atlassian.crowd.service.soap.client.SecurityServerClientImpl.getSoapApplicationToken(SecurityServerClientImpl.java:215)
    at com.atlassian.crowd.service.soap.client.SecurityServerClientImpl.getCookieInfo(SecurityServerClientImpl.java:1524)
    at com.atlassian.crowd.integration.http.HttpAuthenticatorImpl.invalidateClient(HttpAuthenticatorImpl.java:86)
    at com.atlassian.crowd.integration.http.HttpAuthenticatorImpl.logoff(HttpAuthenticatorImpl.java:287)
    at com.atlassian.crowd.integration.springsecurity.CrowdSSOAuthenticationProcessingFilter.unsuccessfulAuthentication(CrowdSSOAuthenticationProcessingFilter.java:250)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:225)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
  ....
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.codehaus.xfire.XFireException: Couldn't send message.
    at org.codehaus.xfire.transport.http.HttpChannel.sendViaClient(HttpChannel.java:145)
    at org.codehaus.xfire.transport.http.HttpChannel.send(HttpChannel.java:48)
    at org.codehaus.xfire.handler.OutMessageSender.invoke(OutMessageSender.java:26)
    ... 100 more
Caused by: java.net.UnknownHostException: host.url.com
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:579)
....

Cause

According to the following line, Crowd reports that it's not able to resolve the address for the host host.url.com:

Caused by: java.net.UnknownHostException: host.url.com

Resolution

From the machine running Crowd, ensure that the domain name can be resolve via nslookup (or similar). You may need to change the DNS servers used by the Crowd machine, or add an entry to your hosts file to ensure correct resolution.

You can also change the crowd.properties file to a different host name (if the host name is incorrect) with the following steps:

  1. Open <crowd-home> directory
  2. Open crowd.properties file with any text editor and edit the host name

The host name must be the host name of the Crowd server

Last modified on Mar 30, 2016

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