TheNeuralBit commented on a change in pull request #10900:
URL: https://github.com/apache/beam/pull/10900#discussion_r445880888
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File path:
runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/External.java
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@@ -222,6 +226,20 @@ public OutputT expand(InputT input) {
});
externalPCollectionIdMap = externalPCollectionIdMapBuilder.build();
+ Map<Coder, String> externalCoderIdMapBuilder = new HashMap<>();
+ expandedComponents
+ .getPcollectionsMap()
+ .forEach(
+ (pcolId, pCol) -> {
+ try {
+ Coder coder =
rehydratedComponents.getCoder(pCol.getCoderId());
+ externalCoderIdMapBuilder.putIfAbsent(coder,
pCol.getCoderId());
+ } catch (IOException e) {
+ throw new RuntimeException("cannot rehydrate Coder.");
Review comment:
Won't it often be the case that we can't rehydrate the coder, because
it's specific to another SDK?
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