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From "Karl Wright (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CONNECTORS-1581) [Set priority thread] Error tossed: null during startup
Date Fri, 08 Feb 2019 12:11:00 GMT

    [ https://issues.apache.org/jira/browse/CONNECTORS-1581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16763530#comment-16763530
] 

Karl Wright commented on CONNECTORS-1581:
-----------------------------------------

Here's the code that's throwing an NPE:

{code}
    // Compute the list of connector instances we will need.
    // This has a side effect of fetching all job descriptions too.
    Set<String> connectionNames = new HashSet<String>();
    for (int i = 0; i < descs.length; i++)
    {
      DocumentDescription dd = descs[i];
      IJobDescription job = jobDescriptionMap.get(dd.getJobID());
      if (job == null)
      {
        job = jobManager.load(dd.getJobID(),true);
        jobDescriptionMap.put(dd.getJobID(),job);
      }
      connectionNames.add(job.getConnectionName());
    }
{code}

The problem is, apparently, that jobManager.load(<jobID>) is coming back null.  I have
no idea why this would happen but clearly the problem has to do with the database implementation,
perhaps the mysql driver being used?


> [Set priority thread] Error tossed: null during startup
> -------------------------------------------------------
>
>                 Key: CONNECTORS-1581
>                 URL: https://issues.apache.org/jira/browse/CONNECTORS-1581
>             Project: ManifoldCF
>          Issue Type: Bug
>         Environment: •	ManifoldCF 2.12, running in a Docker Container based on Redhat
Linux, OpenJDK 8 
> •	AWS RDS Database (Aurora MySQL -> 5.6 compatible, utf8 (collation utf8_bin))
> •	Single Process Setup
>            Reporter: Markus Schuch
>            Priority: Major
>
> We see the following {{NullPointerException}} at startup:
> {code}
> [Set priority thread] FATAL org.apache.manifoldcf.crawlerthreads- Error tossed: null
> java.lang.NullPointerException
> at org.apache.manifoldcf.crawler.system.ManifoldCF.writeDocumentPriorities(ManifoldCF.java:1202)
> at org.apache.manifoldcf.crawler.system.SetPriorityThread.run(SetPriorityThread.java:141)
> {code}
> What could be the cause of that?



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