Symptoms

1. When accessing the Browse Project page, in the JIRA logs, trace like below can be found:

   2012-03-22 15:55:44,635 http-8080-28 ERROR      [500ErrorPage.jsp] Exception caught in 500 page GenericValue cannot be null.
   java.lang.IllegalArgumentException: GenericValue cannot be null.
       at com.atlassian.jira.ofbiz.AbstractOfBizValueWrapper.<init>(AbstractOfBizValueWrapper.java:25)
       at com.atlassian.jira.issue.link.IssueLinkType.<init>(IssueLinkType.java:32)
       at com.atlassian.jira.issue.link.DefaultIssueLinkTypeManager.buildIssueLinkType(DefaultIssueLinkTypeManager.java:205)
       at com.atlassian.jira.issue.link.DefaultIssueLinkTypeManager.getIssueLinkType(DefaultIssueLinkTypeManager.java:77)
       at com.atlassian.jira.issue.link.DefaultIssueLinkTypeManager.getIssueLinkType(DefaultIssueLinkTypeManager.java:66)
       at com.atlassian.jira.issue.link.IssueLink.getIssueLinkType(IssueLink.java:81)
       at com.atlassian.jira.issue.index.indexers.impl.SubTaskIndexer.addIndex(SubTaskIndexer.java:54)
       at com.atlassian.jira.issue.index.IssueDocument.getDocument(IssueDocument.java:40)
   

2. Re-indexing JIRA does not helps fixing the issue and might throw another error like:

   java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: GenericValue cannot be null.
   at com.atlassian.jira.index.FutureResult.await(FutureResult.java:35)
   at com.atlassian.jira.index.CompositeResultBuilder$CompositeResult.await(CompositeResultBuilder.java:82)
   at com.atlassian.jira.issue.index.DefaultIndexManager.reIndexAll(DefaultIndexManager.java:243)
   

The following appears in the atlassian-jira.log:

2012-03-22 16:09:36,434 http-8080-19 WARN infpcor 969x31123x1 18knlws 172.16.197.187 /browse/TESTPROJECT [polscheit.jira.plugins.GanttProjectTabPanel] You have not configured an issue link type to be used as Gantt-Dependency!
2012-03-22 16:09:37,455 http-8080-19 ERROR      [500ErrorPage.jsp] Exception caught in 500 page GenericValue cannot be null.
java.lang.IllegalArgumentException: GenericValue cannot be null.
	at com.atlassian.jira.ofbiz.AbstractOfBizValueWrapper.<init>(AbstractOfBizValueWrapper.java:25)
	at com.atlassian.jira.issue.link.IssueLinkType.<init>(IssueLinkType.java:32)
    at com.atlassian.jira.issue.link.DefaultIssueLinkTypeManager.buildIssueLinkType(DefaultIssueLinkTypeManager.java:205)
    at com.atlassian.jira.issue.link.DefaultIssueLinkTypeManager.getIssueLinkType(DefaultIssueLinkTypeManager.java:77)
    at com.atlassian.jira.issue.link.DefaultIssueLinkTypeManager.getIssueLinkType(DefaultIssueLinkTypeManager.java:66)
    at com.atlassian.jira.issue.link.IssueLink.getIssueLinkType(IssueLink.java:81)
    at com.atlassian.jira.issue.index.indexers.impl.SubTaskIndexer.addIndex(SubTaskIndexer.java:54)
    at com.atlassian.jira.issue.index.IssueDocument.getDocument(IssueDocument.java:40)

Cause

Invalid issue link exist in the database

Resolution

1. Stop JIRA.

2. Verify if there are any invalid links in the database with the below SQL:
   

   SELECT * FROM issuelink where LINKTYPE not in (select ID from issuelinktype);

   If there any results returned, there are invalid links in the database. 

3. Remove all invalid links with the following SQL:
   

   DELETE FROM issuelink where LINKTYPE not in (select ID from issuelinktype);

    

4. Start JIRA.
5. Reindex JIRA.