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Posted to issues@spark.apache.org by "jacklzg (Jira)" <ji...@apache.org> on 2020/11/30 07:51:00 UTC
[jira] [Updated] (SPARK-33598) Support Java Class with circular
references
[ https://issues.apache.org/jira/browse/SPARK-33598?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
jacklzg updated SPARK-33598:
----------------------------
Description:
If the target Java data class has a circular reference, Spark will fail fast from creating the Dataset or running Encoders.
For example, with protobuf class, there is a reference with Descriptor, there is no way to build a dataset from the protobuf class.
From this line
{color:#7a869a}Encoders.bean(ProtoBuffOuterClass.ProtoBuff.class);{color}
It will throw out immediately
{quote}Exception in thread "main" java.lang.UnsupportedOperationException: Cannot have circular references in bean class, but got the circular reference of class class com.google.protobuf.Descriptors$Descriptor
{quote}
Can we add a parameter, for example,
{code:java}
Encoders.bean(Class<T> clas, List<Fields> fieldsToIgnore);{code}
````
or
{code:java}
Encoders.bean(Class<T> clas, boolean skipCircularRefField);{code}
was:
If the target Java data class has a circular reference, Spark will fail fast from creating the Dataset or running Encoders.
For example, with protobuf class, there is a reference with Descriptor, there is no way to build a dataset from the protobuf class.
From this line
```
{quote}
{code:java}
Encoders.bean(ProtoBuffOuterClass.ProtoBuff.class);{code}
{quote}
```
It will throw out immediately
```
{quote}Exception in thread "main" java.lang.UnsupportedOperationException: Cannot have circular references in bean class, but got the circular reference of class class com.google.protobuf.Descriptors$Descriptor
{quote}
```
Can we add a parameter, for example,
```
{code:java}
Encoders.bean(Class<T> clas, List<Fields> fieldsToIgnore);{code}
````
or
```
{code:java}
Encoders.bean(Class<T> clas, boolean skipCircularRefField);{code}
````
> Support Java Class with circular references
> -------------------------------------------
>
> Key: SPARK-33598
> URL: https://issues.apache.org/jira/browse/SPARK-33598
> Project: Spark
> Issue Type: Improvement
> Components: Java API
> Affects Versions: 2.4.7
> Reporter: jacklzg
> Priority: Minor
>
> If the target Java data class has a circular reference, Spark will fail fast from creating the Dataset or running Encoders.
>
> For example, with protobuf class, there is a reference with Descriptor, there is no way to build a dataset from the protobuf class.
> From this line
> {color:#7a869a}Encoders.bean(ProtoBuffOuterClass.ProtoBuff.class);{color}
>
> It will throw out immediately
>
> {quote}Exception in thread "main" java.lang.UnsupportedOperationException: Cannot have circular references in bean class, but got the circular reference of class class com.google.protobuf.Descriptors$Descriptor
> {quote}
>
> Can we add a parameter, for example,
>
> {code:java}
> Encoders.bean(Class<T> clas, List<Fields> fieldsToIgnore);{code}
> ````
> or
>
> {code:java}
> Encoders.bean(Class<T> clas, boolean skipCircularRefField);{code}
>
>
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