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https://issues.apache.org/jira/browse/FLINK-10356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16651108#comment-16651108
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ASF GitHub Bot commented on FLINK-10356:
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zhijiangW commented on a change in pull request #6705: [FLINK-10356][network]
add sanity checks to SpillingAdaptiveSpanningRecordDeserializer
URL: https://github.com/apache/flink/pull/6705#discussion_r225395730
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/api/serialization/SpillingAdaptiveSpanningRecordDeserializer.java
##########
@@ -137,7 +162,16 @@ else if (remaining == 0) {
// spanning record case
if (this.spanningWrapper.hasFullRecord()) {
// get the full record
- target.read(this.spanningWrapper.getInputView());
+ try {
+
target.read(this.spanningWrapper.getInputView());
+ } catch (EOFException e) {
+ Optional<String> deserializationError =
this.spanningWrapper.getDeserializationError(1);
Review comment:
I do not quite understand why we set `addToReadBytes` as 1 here.
If the `target.read` is successful, then we do
`spanningWrapper.getDeserializationError(0)` in the following
`moveRemainderToNonSpanningDeserializer` and it makes sense, otherwise we do
`spanningWrapper.getDeserializationError(1)`.
The `spanningWrapper.getDeserializationError(0)` may be also suitable for
the exception case? Because we only want to show some internal informations
during exceptions for debugging. Then we just need one check.
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> Add sanity checks to SpillingAdaptiveSpanningRecordDeserializer
> ---------------------------------------------------------------
>
> Key: FLINK-10356
> URL: https://issues.apache.org/jira/browse/FLINK-10356
> Project: Flink
> Issue Type: Improvement
> Components: Network
> Affects Versions: 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.6.0, 1.6.1, 1.7.0, 1.5.4
> Reporter: Nico Kruber
> Assignee: Nico Kruber
> Priority: Major
> Labels: pull-request-available
>
> {{SpillingAdaptiveSpanningRecordDeserializer}} doesn't have any consistency
> checks for usage calls or serializers behaving properly, e.g. to read only as
> many bytes as available/promised for that record. At least these checks
> should be added:
> # Check that buffers have not been read from yet before adding them (this is
> an invariant {{SpillingAdaptiveSpanningRecordDeserializer}} works with and
> from what I can see, it is followed now.
> # Check that after deserialization, we actually consumed {{recordLength}}
> bytes
> ** If not, in the spanning deserializer, we currently simply skip the
> remaining bytes.
> ** But in the non-spanning deserializer, we currently continue from the
> wrong offset.
> # Protect against {{setNextBuffer}} being called before draining all
> available records
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