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Posted to issues@flink.apache.org by "yankai zhang (JIRA)" <ji...@apache.org> on 2019/04/04 16:27:00 UTC
[jira] [Updated] (FLINK-12113) User code passing to fromCollection(Iterator, Class) not cleaned

     [ https://issues.apache.org/jira/browse/FLINK-12113?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

yankai zhang updated FLINK-12113:
---------------------------------
    Description: 
 
{code:java}
interface IS<E> extends Iterator<E>, Serializable { }

StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.fromCollection(new IS<Object>() {
    @Override
    public boolean hasNext() {
        return false;
    }

    @Override
    public Object next() {
        return null;
    }
}, Object.class);
{code}
Code piece above throws exception:
{code:java}
org.apache.flink.api.common.InvalidProgramException: The implementation of the SourceFunction is not serializable. The object probably contains or references non serializable fields.

  at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:99)
....{code}
And my workaround is wrapping clean around iterator instance, like this:

 
{code:java}
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
env.fromCollection(env.clean(new IS<Object>() {
    @Override
    public boolean hasNext() {
        return false;
    }

    @Override
    public Object next() {
        return null;
    }
}), Object.class);
{code}
 

 

 

  was:
 
{code:java}
interface IS<E> extends Iterator<E>, Serializable { }

StreamExecutionEnvironment
  .getExecutionEnvironment()
  .fromCollection(new IS<Object>() {
    @Override
    public boolean hasNext() {
      return false;
    }

    @Override
    public Object next() {
      return null;
    }
  }, Object.class);
{code}
Code piece above throws exception:
{code:java}
org.apache.flink.api.common.InvalidProgramException: The implementation of the SourceFunction is not serializable. The object probably contains or references non serializable fields.

  at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:99)
....{code}


> User code passing to fromCollection(Iterator, Class) not cleaned
> ----------------------------------------------------------------
>
>                 Key: FLINK-12113
>                 URL: https://issues.apache.org/jira/browse/FLINK-12113
>             Project: Flink
>          Issue Type: Bug
>          Components: API / DataStream
>    Affects Versions: 1.7.2
>            Reporter: yankai zhang
>            Priority: Major
>
>  
> {code:java}
> interface IS<E> extends Iterator<E>, Serializable { }
> StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
> env.fromCollection(new IS<Object>() {
>     @Override
>     public boolean hasNext() {
>         return false;
>     }
>     @Override
>     public Object next() {
>         return null;
>     }
> }, Object.class);
> {code}
> Code piece above throws exception:
> {code:java}
> org.apache.flink.api.common.InvalidProgramException: The implementation of the SourceFunction is not serializable. The object probably contains or references non serializable fields.
>   at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:99)
> ....{code}
> And my workaround is wrapping clean around iterator instance, like this:
>  
> {code:java}
> StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
> env.fromCollection(env.clean(new IS<Object>() {
>     @Override
>     public boolean hasNext() {
>         return false;
>     }
>     @Override
>     public Object next() {
>         return null;
>     }
> }), Object.class);
> {code}
>  
>  
>  



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