[
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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