Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/10911#discussion_r50907599
--- Diff:
common/sketch/src/main/java/org/apache/spark/util/sketch/CountMinSketchImpl.java
---
@@ -348,4 +374,30 @@ public static CountMinSketchImpl readFrom(InputStream
in) throws IOException {
return new CountMinSketchImpl(depth, width, totalCount, hashA, table);
}
+
+ @Override
+ public void writeExternal(ObjectOutput out) throws IOException {
+ try (ByteArrayOutputStream bos = new ByteArrayOutputStream()) {
+ this.writeTo(bos);
+ byte[] bytes = bos.toByteArray();
+ out.writeObject(bytes);
--- End diff --
btw the same applies to count-min sketch.
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