Internal Error in "My tickets"

[TomaszSzt]

In some cases, in fact in both my servers, after some time "mytickets" page returns "Internal Error" for some users.

The logs do show NullPointerException at:

/src/main/java/com/gitblit/wicket/pages/MyTicketsPage.java
(....)
private List correspondingRepositories(Collection tickets) {
final HashMap<String, RepositoryModel> result = new HashMap<>();
for (QueryResult ticket : tickets) {
RepositoryModel repository = app().repositories().getRepositoryModel(ticket.repository);
HERE if (!result.containsKey(repository.getRID())) {
result.put(repository.getRID(), repository);
}
}

    return new ArrayList<>(result.values());
}

(...)

Steps to reproduce:

I couldn't figure it out. I wiped out lucene index in data/tickets/lucene what cleared the InternalError but also cleared the tickes. See next issue.

[TomaszSzt]

Running reindexing script and properly assigning user rights to created index files solves the problem till next time. I will provide more data when this will happen again.