[NIFI-572] Set null Long to 0 before dereference in PersistentProvenanceRepository.submitQuery

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.0.2
• Fix Version/s: 0.1.0
• Component/s: Core Framework
• Assignee: Unassigned
• Reporter: Mark Latimer
• Created: 02/May/15 11:17
• Updated: 03/May/15 21:26
• Resolved: 03/May/15 21:26

Description

                final Long maxEventId = getMaxEventId();
                if (maxEventId == null) {   // maxEventId may be null
                    result.getResult().update(Collections.<ProvenanceEventRecord>emptyList(), 0L);
                }

                ...
                // null maybe dereferenced
                final long totalNumDocs = maxEventId - minIndexedId;