richard-axual commented on a change in pull request #11535:
URL: https://github.com/apache/kafka/pull/11535#discussion_r777961628



##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamTask.java
##########
@@ -1097,15 +1097,20 @@ long decodeTimestamp(final String encryptedString) {
         if (encryptedString.isEmpty()) {
             return RecordQueue.UNKNOWN;
         }
-        final ByteBuffer buffer = 
ByteBuffer.wrap(Base64.getDecoder().decode(encryptedString));
-        final byte version = buffer.get();
-        switch (version) {
-            case LATEST_MAGIC_BYTE:
-                return buffer.getLong();
-            default:
-                log.warn("Unsupported offset metadata version found. Supported 
version {}. Found version {}.",
-                         LATEST_MAGIC_BYTE, version);
-                return RecordQueue.UNKNOWN;
+        try {
+            final ByteBuffer buffer = 
ByteBuffer.wrap(Base64.getDecoder().decode(encryptedString));
+            final byte version = buffer.get();
+            switch (version) {
+                case LATEST_MAGIC_BYTE:
+                    return buffer.getLong();
+                default:
+                    log.warn("Unsupported offset metadata version found. 
Supported version {}. Found version {}.",
+                            LATEST_MAGIC_BYTE, version);
+                    return RecordQueue.UNKNOWN;
+            }
+        } catch (final IllegalArgumentException argumentException) {

Review comment:
       @mjsax I've updated the implementation, can you take a look again?




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