From 2bf5d1a56d0e0803020df859dff616f88db4c3cd Mon Sep 17 00:00:00 2001
From: Denes Arvay <denes@apache.org>
Date: Thu, 19 Nov 2020 15:31:53 +0100
Subject: [PATCH] NIFI-8017 NPEx at org.apache.nifi.provenance.index.lucene.
 IndexDirectoryManager:486

Added an extra null-check to avoid NullPointerException
---
 .../nifi/provenance/index/lucene/IndexDirectoryManager.java     | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/src/main/java/org/apache/nifi/provenance/index/lucene/IndexDirectoryManager.java b/nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/src/main/java/org/apache/nifi/provenance/index/lucene/IndexDirectoryManager.java
index e9c94c3e67..9f59d07608 100644
--- a/nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/src/main/java/org/apache/nifi/provenance/index/lucene/IndexDirectoryManager.java
+++ b/nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/src/main/java/org/apache/nifi/provenance/index/lucene/IndexDirectoryManager.java
@@ -483,6 +483,8 @@ public class IndexDirectoryManager {
     }
 
     private boolean isParent(final File file, final File potentialParent) {
+        if (file == null) return false;
+
         final File parentFile = file.getParentFile();
         if (parentFile != null && parentFile.equals(potentialParent)) {
             return true;