guozhangwang commented on a change in pull request #8896:
URL: https://github.com/apache/kafka/pull/8896#discussion_r443001288



##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/StoreChangelogReader.java
##########
@@ -415,19 +418,20 @@ public void restore() {
                 // for restoring active and updating standby we may prefer 
different poll time
                 // in order to make sure we call the main consumer#poll in 
time.
                 // TODO: once we move ChangelogReader to a separate thread 
this may no longer be a concern
-                polledRecords = 
restoreConsumer.poll(state.equals(ChangelogReaderState.STANDBY_UPDATING) ? 
Duration.ZERO : pollTime);
+                polledRecords = restoreConsumer.poll(state == 
ChangelogReaderState.STANDBY_UPDATING ? Duration.ZERO : pollTime);
             } catch (final InvalidOffsetException e) {
-                log.warn("Encountered {} fetching records from restore 
consumer for partitions {}, it is likely that " +
+                log.warn("Encountered " + e.getClass().getName() +
+                    " fetching records from restore consumer for partitions " 
+ e.partitions() + ", it is likely that " +
                     "the consumer's position has fallen out of the topic 
partition offset range because the topic was " +
                     "truncated or compacted on the broker, marking the 
corresponding tasks as corrupted and re-initializing" +
-                    " it later.", e.getClass().getName(), e.partitions());
+                    " it later.", e);

Review comment:
       Ah got it, I'm still think about it as the string template and was 
overlooking that. SG.




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