stankiewicz commented on code in PR #38149:
URL: https://github.com/apache/beam/pull/38149#discussion_r3075675155


##########
sdks/java/io/iceberg/src/main/java/org/apache/beam/sdk/io/iceberg/AppendFilesToTables.java:
##########
@@ -251,5 +252,12 @@ private boolean shouldSkip(Table table, 
Iterable<FileWriteResult> fileWriteResul
       }
       return false;
     }
+
+    @Teardown
+    public void teardown() throws IOException {
+      if (catalog instanceof Closeable) {
+        ((Closeable) catalog).close();

Review Comment:
   on closing, I guess this PR has one of the valid approaches, with the 
assumption that catalog is unique to doFn instance.
   
   One problem - RecordWriterManager still have static cache where 
`getOrCreateTable` may return closed IO. 
   
   



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