Unable to delete a client from SUSE Manager Server

This document (000020738) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Manager 4.3 Server
SUSE Manager 4.2 Server

Situation

When the client is deleted from SUSE Manager Server (e.g. using web-UI) the following message appears: "Please check the cobbler service". There are no related error messages in "/var/log/cobbler/cobbler.log" or in "/var/log/rhn/rhn_web_ui.log". There is an error message visible in "/var/log/rhn/rhn_taskomatic_daemon.log",however, and it reads:
2022-08-22 10:46:00,278 [DefaultQuartzScheduler_Worker-10] ERROR com.redhat.rhn.taskomatic.task.CobblerSyncTask - re-throwing exception since we havent yet.
2022-08-22 10:46:00,278 [DefaultQuartzScheduler_Worker-10] ERROR com.redhat.rhn.taskomatic.task.CobblerSyncTask - Executing a task threw an exception: java.lang.RuntimeException
2022-08-22 10:46:00,278 [DefaultQuartzScheduler_Worker-10] ERROR com.redhat.rhn.taskomatic.task.CobblerSyncTask - Message: XmlRpcException calling cobbler.
2022-08-22 10:46:00,278 [DefaultQuartzScheduler_Worker-10] ERROR com.redhat.rhn.taskomatic.task.CobblerSyncTask - Cause: redstone.xmlrpc.XmlRpcException: A network error occurred.
2022-08-22 10:46:00,278 [DefaultQuartzScheduler_Worker-10] ERROR com.redhat.rhn.taskomatic.task.CobblerSyncTask - Stack trace:java.lang.RuntimeException: XmlRpcException calling cobbler.
        at com.redhat.rhn.manager.kickstart.cobbler.CobblerXMLRPCHelper.invokeMethod(CobblerXMLRPCHelper.java:73)
        at com.redhat.rhn.taskomatic.task.CobblerSyncTask.execute(CobblerSyncTask.java:70)
        at com.redhat.rhn.taskomatic.task.RhnJavaJob.execute(RhnJavaJob.java:90)
        at com.redhat.rhn.taskomatic.TaskoJob.execute(TaskoJob.java:199)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
Caused by: redstone.xmlrpc.XmlRpcException: A network error occurred.
        at redstone.xmlrpc.XmlRpcClient.endCall(XmlRpcClient.java:381)
        at redstone.xmlrpc.XmlRpcClient.invoke(XmlRpcClient.java:165)
        at com.redhat.rhn.manager.kickstart.cobbler.CobblerXMLRPCHelper.invokeMethod(CobblerXMLRPCHelper.java:70)
        ... 5 more
Caused by: java.net.ConnectException: Connection refused (Connection refused)
        at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
        at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
        at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
        at java.base/java.net.Socket.connect(Socket.java:609)
        at java.base/java.net.Socket.connect(Socket.java:558)
        at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182)
        at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:474)
        at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:569)
        at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
        at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:341)
        at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:362)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1253)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1187)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1015)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1367)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1342)
        at redstone.xmlrpc.XmlRpcClient.endCall(XmlRpcClient.java:370)
        ... 7 more

Resolution

Make sure that both ports (80 and 443) are enabled in "/etc/apache2/listen.conf"
Listen 80

<IfDefine SSL>
    <IfDefine !NOSSL>
    <IfModule mod_ssl.c>

        Listen 443

    </IfModule>
    </IfDefine>
</IfDefine>

Cause

In "/etc/cobbler/settings", there is defined "http_port: 80":

susemanager:~ # grep http_port /etc/cobbler/settings
http_port: 80
When the httpd service is listening on port 443 only:
susemanager:~ # lsof -P -i -n | grep httpd
httpd-pre  7250   wwwrun    6u  IPv6  5720850      0t0  TCP *:443 (LISTEN)
...
The connection to port 80 can not be established and "Connection refused" message appears.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000020738
  • Creation Date: 30-Aug-2022
  • Modified Date:14-Sep-2022
    • SUSE Manager Server
    • SUSE Manager

< Back to Support Search

For questions or concerns with the SUSE Knowledgebase please contact: tidfeedback[at]suse.com

SUSE Support Forums

Get your questions answered by experienced Sys Ops or interact with other SUSE community experts.

Join Our Community

Support Resources

Learn how to get the most from the technical support you receive with your SUSE Subscription, Premium Support, Academic Program, or Partner Program.


SUSE Customer Support Quick Reference Guide SUSE Technical Support Handbook Update Advisories
Support FAQ

Open an Incident

Open an incident with SUSE Technical Support, manage your subscriptions, download patches, or manage user access.

Go to Customer Center