tpalfy commented on a change in pull request #4792:
URL: https://github.com/apache/nifi/pull/4792#discussion_r567717333



##########
File path: 
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/TailFile.java
##########
@@ -1172,19 +1188,28 @@ private boolean recoverRolledFiles(final ProcessContext 
context, final ProcessSe
                 final File firstFile = rolledOffFiles.get(0);
 
                 final long startNanos = System.nanoTime();
+                final Boolean reReadOnNul = 
context.getProperty(REREAD_ON_NUL).asBoolean();
                 if (position > 0) {
-                    try (final InputStream fis = new 
FileInputStream(firstFile);
-                            final CheckedInputStream in = new 
CheckedInputStream(fis, new CRC32())) {
-                        StreamUtils.copy(in, new NullOutputStream(), position);
+                    try (final FileInputStream fis = new 
FileInputStream(firstFile)) {

Review comment:
       I think we don't need `readLines` here because we already processed to 
content up to this point.




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