codope commented on code in PR #9776:
URL: https://github.com/apache/hudi/pull/9776#discussion_r1348276299


##########
hudi-common/src/main/java/org/apache/hudi/common/model/HoodieFileGroup.java:
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@@ -101,12 +103,36 @@ public void addBaseFile(HoodieBaseFile dataFile) {
 
   /**
    * Add a new log file into the group.
+   *
+   * <p>CAUTION: the log file must be added in sequence of the delta commit 
time.

Review Comment:
   Filesystem view calls this while building filegroups and that call is in 
sycnhronized block. However, we should have a multi writer and concurrent 
reader test to validate. Or we can make this visible for testing and start two 
threads to add log files and validate.



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