[jira] [Comment Edited] (OODT-550) 'getFirstPage' Command Throws Exception After Restarting Server

["Brian Foster (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/OODT-550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13550978#comment-13550978 ] 

Brian Foster edited comment on OODT-550 at 1/11/13 8:32 AM:
------------------------------------------------------------

Actually... which repository are you using?... is it persistant... rebooting workflow loses state i believe.
                
      was (Author: bfoster):
    this just a guess... but try making the following change in org.apache.oodt.cas.workflow.cli.action.WorkflowCliAction:

Currently getClient() looks like this:
{code}
   protected XmlRpcWorkflowManagerClient getClient()
         throws MalformedURLException {
      Validate.notNull(getUrl());

      if (client != null) {
         return client;
      } else {
         return new XmlRpcWorkflowManagerClient(new URL(getUrl()));
      }
   }
{code}
Change it to look like this;
{code}
   protected XmlRpcWorkflowManagerClient getClient()
         throws MalformedURLException {
      Validate.notNull(getUrl());
      return new XmlRpcWorkflowManagerClient(new URL(getUrl()));
   }
{code}

my guess is that maybe the XML-RPC client is holding onto something from the previous workflow server
                  
> 'getFirstPage' Command Throws Exception After Restarting Server
> ---------------------------------------------------------------
>
>                 Key: OODT-550
>                 URL: https://issues.apache.org/jira/browse/OODT-550
>             Project: OODT
>          Issue Type: Bug
>          Components: workflow manager
>    Affects Versions: 0.5
>            Reporter: Michael Cayanan
>            Priority: Minor
>             Fix For: 0.6
>
>
> Running the _getFirstPage_ command after restarting the Workflow Manager Server throws an exception. Below shows the set of commands to run to reproduce the issue:
> {code}
> % ./wmgr-client -u http://localhost:9001 --operation --getFirstPage
> Page: [num=0,pageSize=0,totalPages=0]
> % ./wmgr-client -u http://localhost:9001 -en urn:oodt:TestParallel --metaData --key numSeconds 15 -op -se
> Sending event 'urn:oodt:TestParallel'... SUCCESS
> % ./wmgr-client -u http://localhost:9001 --operation --getFirstPage
> Page: [num=1,pageSize=20,totalPages=1]
> Instance: [id=4e5a2d0c-4b47-11e2-977b-c39e66f8f1d5, status=STARTED, currentTask=urn:oodt:IntensiveTask, workflow=Parallel Single Task Processor Intensive Task, wallClockTime=0.09376666666666668, currentTaskWallClockTime=0.0]
> Instance: [id=4e4e6d3b-4b47-11e2-977b-c39e66f8f1d5, status=FINISHED, currentTask=urn:oodt:GoodbyeWorld, workflow=HelloGoodbye, wallClockTime=0.0049, currentTaskWallClockTime=0.0]
> % ./wmgr restart
> -n Shutting down cas workflow manager: 
> OK
> -n Starting cas workflow manager: 
> OK
> Dec 21, 2012 12:21:50 AM org.apache.oodt.cas.workflow.system.XmlRpcWorkflowManager loadProperties
> INFO: Loading Workflow Manager Configuration Properties from: [../etc/workflow.properties]
> Dec 21, 2012 12:21:50 AM org.apache.oodt.cas.workflow.engine.ThreadPoolWorkflowEngineFactory getResmgrUrl
> INFO: No Resource Manager URL provided or malformed URL: executing jobs locally. URL: []
> Adding condition: [Timeout Condition] to parent workflow: [TestParallel]
> Dec 21, 2012 12:21:50 AM org.apache.oodt.cas.workflow.system.XmlRpcWorkflowManager <init>
> INFO: Workflow Manager started by mcayanan
> % ./wmgr-client -u http://localhost:9001 --operation --getFirstPage
> org.apache.xmlrpc.XmlRpcException: java.lang.Exception: java.lang.NullPointerException
> at org.apache.xmlrpc.XmlRpcClientResponseProcessor.decodeException(XmlRpcClientResponseProcessor.java:104)
> at org.apache.xmlrpc.XmlRpcClientResponseProcessor.decodeResponse(XmlRpcClientResponseProcessor.java:71)
> at org.apache.xmlrpc.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:73)
> at org.apache.xmlrpc.XmlRpcClient.execute(XmlRpcClient.java:194)
> at org.apache.xmlrpc.XmlRpcClient.execute(XmlRpcClient.java:185)
> at org.apache.xmlrpc.XmlRpcClient.execute(XmlRpcClient.java:178)
> at org.apache.oodt.cas.workflow.system.XmlRpcWorkflowManagerClient.getFirstPage(XmlRpcWorkflowManagerClient.java:122)
> at org.apache.oodt.cas.workflow.cli.action.GetFirstPageCliAction.execute(GetFirstPageCliAction.java:47)
> at org.apache.oodt.cas.cli.CmdLineUtility.execute(CmdLineUtility.java:331)
> at org.apache.oodt.cas.cli.CmdLineUtility.run(CmdLineUtility.java:187)
> at org.apache.oodt.cas.workflow.system.XmlRpcWorkflowManagerClient.main(XmlRpcWorkflowManagerClient.java:678)
> ERROR: Failed to get first page of workflows : java.lang.Exception: java.lang.NullPointerException
> {code}

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