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https://issues.apache.org/jira/browse/FLINK-16916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek reassigned FLINK-16916:
----------------------------------------
Assignee: Congxian Qiu(klion26)
> The logic of NullableSerializer#copy is wrong
> ---------------------------------------------
>
> Key: FLINK-16916
> URL: https://issues.apache.org/jira/browse/FLINK-16916
> Project: Flink
> Issue Type: Bug
> Components: API / Type Serialization System
> Affects Versions: 1.8.3, 1.9.2, 1.10.0
> Reporter: Congxian Qiu(klion26)
> Assignee: Congxian Qiu(klion26)
> Priority: Blocker
> Fix For: 1.8.4, 1.9.3, 1.11.0, 1.10.2
>
>
> When debugging the problem reported by FLINK-16724, Found that the logic of
> {{NullableSerializer#copy}} is wrong. currently, the logic is such as below:
> {code:java}
> public void copy(DataInputView source, DataOutputView target) throws
> IOException {
> boolean isNull = source.readBoolean();
> target.writeBoolean(isNull);
> if (isNull) {
> target.write(padding);
> }
> else {
> originalSerializer.copy(source, target);
> }
> }
> {code}
> we forgot to skip {{paddings.length}} bytes when if the {{padding}}'s length
> is not 0.
> We can correct the logic such as below
> {code:java}
> public void copy(DataInputView source, DataOutputView target) throws
> IOException {
> boolean isNull = deserializeNull(source); // this will skip the padding
> values.
> target.writeBoolean(isNull);
> if (isNull) {
> target.write(padding);
> }
> else {
> originalSerializer.copy(source, target);
> }
> }
> {code}
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