how to debug failed oozie workflows on Analytics for Apache Hadoop?

问题

I'm trying to run an oozie workflow on Bluemix Analytics for Apache Hadoop, but it it failing. The output from calling Workflow status is as follows:

    ...
    {
      "errorMessage": "Main class [org.apache.oozie.action.hadoop.ShellMain], exit code [1]",
      "status": "ERROR",
      "stats": null,
      "data": null,
      "transition": "fail",
      "externalStatus": "FAILED/KILLED",
      "cred": "null",
      "conf": "<shell xmlns=\"uri:oozie:shell-action:0.2\"> 
                  <job-tracker>****:8050</job-tracker>
                  <name-node>hdfs://****:8020</name-node>          
                  <configuration>
                     <property>      
                        <name>mapred.job.queue.name</name>   
                        <value>default</value>
                     </property>
                  </configuration>  
                  <exec>/usr/bin/python</exec>
                  <argument>oozie_python.py</argument>
                  <file>oozie_python.py#oozie_python.py</file>
               </shell>",
      "type": "shell",
      "endTime": "Tue, 13 Oct 2015 17:00:05 GMT",
      "externalId": "job_1444057234209_0042",
      "id": "0000023-151005150325577-oozie-oozi-W@oozie-python",
      "startTime": "Tue, 13 Oct 2015 16:59:53 GMT",
      "externalChildIDs": null,
      "name": "oozie-python",
      "errorCode": "JA018",
      "trackerUri": "****:8050",
      "retries": 0,
      "toString": "Action name[oozie-python] status[ERROR]",
      "consoleUrl": "http://****:8088/proxy/application_1444057234209_0042/"
    },
    ...

Unfortunately, this doesn't help at all for debugging the error. The consoleUrl is not accessible.

Question: how can I debug this issue on Bluemix Analytics for Apache Hadoop?

来源：https://stackoverflow.com/questions/33108767/how-to-debug-failed-oozie-workflows-on-analytics-for-apache-hadoop