(solr) branch main updated: SOLR-17120: handle null value when merging partials (#2214)

[cpoerschke]

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cpoerschke pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/solr.git


The following commit(s) were added to refs/heads/main by this push:
     new 571c8871278 SOLR-17120: handle null value when merging partials (#2214)
571c8871278 is described below

commit 571c8871278bc14aea683420aea58ef64e38bbae
Author: Calvin Smith <eukary...@users.noreply.github.com>
AuthorDate: Wed Jan 24 10:29:09 2024 -0800

    SOLR-17120: handle null value when merging partials (#2214)
    
    * SOLR-17120 handle null value when merging partials
    
      - this change avoids a `NullPointerException` that can occur
        under some circumstances when performing multiple partial
        updates of the same document
---
 solr/CHANGES.txt                                         | 3 +++
 solr/core/src/java/org/apache/solr/update/UpdateLog.java | 9 +++++++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index b2c00b14911..36b7be60896 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -195,6 +195,9 @@ Bug Fixes
 
 * SOLR-17074: Fixed not correctly escaped quote in bin/solr script (Dominique 
Béjean, Vincenzo D'Amore)
 
+* SOLR-17120: Fix NullPointerException in UpdateLog.applyOlderUpdates that can 
occur if there are multiple partial
+  updates of the same document in separate requests using commitWithin. 
(Calvin Smith, Christine Poerschke)
+
 Dependency Upgrades
 ---------------------
 * SOLR-17012: Update Apache Hadoop to 3.3.6 and Apache Curator to 5.5.0 (Kevin 
Risden)
diff --git a/solr/core/src/java/org/apache/solr/update/UpdateLog.java 
b/solr/core/src/java/org/apache/solr/update/UpdateLog.java
index c9301356a0c..c13530891fd 100644
--- a/solr/core/src/java/org/apache/solr/update/UpdateLog.java
+++ b/solr/core/src/java/org/apache/solr/update/UpdateLog.java
@@ -1020,8 +1020,13 @@ public class UpdateLog implements PluginInfoInitialized, 
SolrMetricProducer {
       // if the newerDoc has this field, then this field from olderDoc can be 
ignored
       if (!newerDoc.containsKey(fieldName)
           && (mergeFields == null || mergeFields.contains(fieldName))) {
-        for (Object val : olderDoc.getFieldValues(fieldName)) {
-          newerDoc.addField(fieldName, val);
+        Collection<Object> values = olderDoc.getFieldValues(fieldName);
+        if (values == null) {
+          newerDoc.addField(fieldName, null);
+        } else {
+          for (Object val : values) {
+            newerDoc.addField(fieldName, val);
+          }
         }
       }
     }