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Posted to issues@flink.apache.org by "Jingsong Lee (Jira)" <ji...@apache.org> on 2019/11/20 11:03:00 UTC
[jira] [Commented] (FLINK-14875) Set Unmodifiable collection
serializer of Kryo in Flink code
[ https://issues.apache.org/jira/browse/FLINK-14875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16978311#comment-16978311 ]
Jingsong Lee commented on FLINK-14875:
--------------------------------------
Hi [~jinyu.zj], I think there are some methods to set serializers to kryo in ExecutionConfig.
But blink-planner not work because we not pass the right ExecutionConfig to the creation of serializer.
> Set Unmodifiable collection serializer of Kryo in Flink code
> ------------------------------------------------------------
>
> Key: FLINK-14875
> URL: https://issues.apache.org/jira/browse/FLINK-14875
> Project: Flink
> Issue Type: Bug
> Components: API / Type Serialization System
> Reporter: Jing Zhang
> Priority: Major
> Attachments: ImmutableCollectionKryoDeserializerITCase.java
>
>
> If source contains data which has immutable collection, the exception will be thrown out:
> {code:java}
> Caused by: com.esotericsoftware.kryo.KryoException: java.lang.UnsupportedOperationException
> Serialization trace:
> logTags_ (com.aliyun.openservices.log.common.Logs$LogGroup)
> mLogGroup (com.aliyun.openservices.log.common.LogGroupData)
> at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:125)
> at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528)
> at com.esotericsoftware.kryo.Kryo.readObjectOrNull(Kryo.java:730)
> at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:113)
> at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761)
> at org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.deserialize(KryoSerializer.java:315)
> at org.apache.flink.api.common.typeutils.base.ListSerializer.deserialize(ListSerializer.java:138)
> at org.apache.flink.api.common.typeutils.base.ListSerializer.deserialize(ListSerializer.java:47)
> at org.apache.flink.util.InstantiationUtil.deserializeFromByteArray(InstantiationUtil.java:463)
> at org.apache.flink.table.dataformat.BinaryRow.getGeneric(BinaryRow.java:440)
> at BaseRowSerializerProjection$52.apply(Unknown Source)
> at BaseRowSerializerProjection$52.apply(Unknown Source)
> at org.apache.flink.table.typeutils.BaseRowSerializer.baseRowToBinary(BaseRowSerializer.java:250)
> at org.apache.flink.table.typeutils.BaseRowSerializer.serializeToPages(BaseRowSerializer.java:285)
> at org.apache.flink.table.typeutils.BaseRowSerializer.serializeToPages(BaseRowSerializer.java:55)
> at org.apache.flink.table.runtime.sort.BinaryInMemorySortBuffer.write(BinaryInMemorySortBuffer.java:190)
> at org.apache.flink.table.runtime.sort.BinaryExternalSorter.write(BinaryExternalSorter.java:540)
> ... 10 more
> Caused by: java.lang.UnsupportedOperationException
> at java.util.Collections$UnmodifiableCollection.add(Collections.java:1055)
> at com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:109)
> at com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:22)
> at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:679)
> at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:106)
> ... 27 more
> {code}
> the exception could also appears in a simple ITCase in attachments.
> I find similar problems in [How to set Unmodifiable collection serializer of Kryo in Spark code|https://stackoverflow.com/questions/46818293/how-to-set-unmodifiable-collection-serializer-of-kryo-in-spark-code], however there is no way to set unmodifiable collection serializer of Kryo in Flink at present. Maybe we could take it into consideration.
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