Error saving workflow to Oozie: HTTP Error 401 Auth failure

[#1]

Hi all,

I've set up a new instance of HDP 2.6. I've also added the Workflow Manager view to be able to add workflows/coordinator jobs to Oozie easily. However when I submit a Workflow to Oozie in the Workflow Manager view, I only get the following error message:

Error occurred while saving workflow
Submitting job to Oozie failed. Please check your definition/configuration.

HTTP Status 401 -

description This request requires HTTP authentication.
Apache Tomcat/6.0.48

    at org.apache.oozie.ambari.view.OozieDelegate.submitWorkflowJobToOozie(OozieDelegate.java:104)
    at org.apache.oozie.ambari.view.OozieProxyImpersonator.submitJob(OozieProxyImpersonator.java:208)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
[...]

Do I need to enter some username/password somewhere...? I did not see any setting for this in the workflow manager?

Regards

Frank

[#2 · Accepted solution]

I managed to fix it myself 🙂 looks like the reverse DNS lookup does/did not work correctly in my virtual machine which I used for testing. Setting the config setting hadoop.proxyuser.oozie.hosts to * (for testing!) fixed the problem (before it was the hostname). I guess this had to with the IP address 127.0.0.1 being mapped to localhost and not to the hostname of my machine, which is mapped to 127.0.1.1.