Github user StephanEwen commented on a diff in the pull request: https://github.com/apache/flink/pull/3305#discussion_r101008561 --- Diff: flink-core/src/main/java/org/apache/flink/api/common/typeutils/base/ArrayListSerializer.java --- @@ -108,9 +112,13 @@ public void copy(DataInputView source, DataOutputView target) throws IOException @Override public boolean equals(Object obj) { + if (obj.getClass() != getClass()) { + System.out.println("other " + obj.getClass().getName() + ", this " + getClass().getName()); --- End diff -- This is probably left over code that should be removed.
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