scwhittle commented on code in PR #22645:
URL: https://github.com/apache/beam/pull/22645#discussion_r945611448
##########
sdks/java/core/src/main/java/org/apache/beam/sdk/io/WriteFiles.java:
##########
@@ -996,10 +1001,18 @@ public void finishBundle(FinishBundleContext c) throws
Exception {
c.output(result.getValue(), result.getKey(),
result.getValue().getWindow());
}
} finally {
- deferredOutput = null;
- closeFutures = null;
+ deferredOutput.clear();
+ closeFutures.clear();
}
}
+
+ // Ensure that transient fields are initialized.
Review Comment:
Any reason to prefer this to the @ Setup method?
If not, I'd say that is preferrable since it is a standard Beam DoFn method
and the name is more self-explanatory.
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