uschindler commented on a change in pull request #2052:
URL: https://github.com/apache/lucene-solr/pull/2052#discussion_r558840321



##########
File path: 
lucene/misc/src/java/org/apache/lucene/misc/store/DirectIODirectory.java
##########
@@ -346,17 +360,21 @@ public byte readByte() throws IOException {
 
     private void refill() throws IOException {
       filePos += buffer.capacity();
-      
+
+      // BaseDirectoryTestCase#testSeekPastEOF test for consecutive read past 
EOF,
+      // hence throwing EOFException early to maintain buffer state (position 
in particular)
+      if(filePos >= channel.size()) {

Review comment:
       I think this was exactly the problem. I was yesterday about to change 
this to `>` instead of `>=`. It is allowed to seek to exectly the file size, 
which was obviously causing the test failures on windows.




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