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https://issues.apache.org/jira/browse/GEODE-8073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17100264#comment-17100264
 ] 

ASF GitHub Bot commented on GEODE-8073:
---------------------------------------

pivotal-eshu commented on a change in pull request #5055:
URL: https://github.com/apache/geode/pull/5055#discussion_r420417517



##########
File path: 
geode-core/src/test/java/org/apache/geode/internal/cache/PartitionedRegionTest.java
##########
@@ -573,6 +578,50 @@ public void 
transactionThrowsTransactionDataRebalancedExceptionIfIsAForceReattem
         
.hasMessage(PartitionedRegion.DATA_MOVED_BY_REBALANCE).hasCause(exception);
   }
 
+  @Test
+  public void failuresSavedIfFetchKeysThrows() throws Exception {
+    PartitionedRegion spyPartitionedRegion = spy(partitionedRegion);
+
+    VersionedObjectList values = mock(VersionedObjectList.class);
+    ServerConnection serverConnection = mock(ServerConnection.class);
+    Set<Integer> failures = mock(Set.class);

Review comment:
       The mocked failures as a set is used later to verify whether a method is 
invoked on the set. Otherwise it would be hard to verify.




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> NullPointerException thrown in PartitionedRegion.handleOldNodes
> ---------------------------------------------------------------
>
>                 Key: GEODE-8073
>                 URL: https://issues.apache.org/jira/browse/GEODE-8073
>             Project: Geode
>          Issue Type: Bug
>          Components: regions
>            Reporter: Eric Shu
>            Assignee: Eric Shu
>            Priority: Major
>              Labels: caching-applications
>
> The NPE can be thrown when a remote node is gone unexpectedly.
> {noformat}
> Caused by: java.lang.NullPointerException
>         at 
> org.apache.geode.internal.cache.PartitionedRegion.handleOldNodes(PartitionedRegion.java:4610)
>         at 
> org.apache.geode.internal.cache.PartitionedRegion.fetchEntries(PartitionedRegion.java:4689)
>         at 
> org.apache.geode.internal.cache.tier.sockets.BaseCommand.handleKVKeysPR(BaseCommand.java:1191)
>         at 
> org.apache.geode.internal.cache.tier.sockets.BaseCommand.handleKVAllKeys(BaseCommand.java:1124)
>         at 
> org.apache.geode.internal.cache.tier.sockets.BaseCommand.handleKeysValuesPolicy(BaseCommand.java:973)
>         at 
> org.apache.geode.internal.cache.tier.sockets.BaseCommand.fillAndSendRegisterInterestResponseChunks(BaseCommand.java:905)
>         at 
> org.apache.geode.internal.cache.tier.sockets.command.RegisterInterest61.cmdExecute(RegisterInterest61.java:260)
>         at 
> org.apache.geode.internal.cache.tier.sockets.BaseCommand.execute(BaseCommand.java:183)
>         at 
> org.apache.geode.internal.cache.tier.sockets.ServerConnection.doNormalMessage(ServerConnection.java:848)
>         at 
> org.apache.geode.internal.cache.tier.sockets.OriginalServerConnection.doOneMessage(OriginalServerConnection.java:72)
>         at 
> org.apache.geode.internal.cache.tier.sockets.ServerConnection.run(ServerConnection.java:1212)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>         at 
> org.apache.geode.internal.cache.tier.sockets.AcceptorImpl.lambda$initializeServerConnectionThreadPool$3(AcceptorImpl.java:686)
>         at 
> org.apache.geode.logging.internal.executors.LoggingThreadFactory.lambda$newThread$0(LoggingThreadFactory.java:119)
>         at java.lang.Thread.run(Thread.java:748)
> {noformat}



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