[jira] [Commented] (FLINK-10264) Exception is misleading when no default constructor define for events

["Basil (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-10264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17175538#comment-17175538 ] 

Basil commented on FLINK-10264:
-------------------------------

Also POJO fields for booleans must have all variants on getters and setters

e.g. 
{code:java}
private boolean first;
public boolean isFirst() {return first;}
public boolean getIsFirst() {return first;}
public void setIsFirst(boolean first) { this.first = first; }
public void setFirst(boolean first) { this.first = first; }

//
private boolean isCurrent;
public boolean isCurrent() {return isCurrent;}
public boolean getIsCurrent() {return isCurrent;}
public void setCurrent(boolean current) {isCurrent = current;}
public void setIsCurrent(boolean current) {isCurrent = current;}
{code}
 

> Exception is misleading when no default constructor define for events
> ---------------------------------------------------------------------
>
>                 Key: FLINK-10264
>                 URL: https://issues.apache.org/jira/browse/FLINK-10264
>             Project: Flink
>          Issue Type: Bug
>          Components: API / DataStream
>            Reporter: Swapan Shaw
>            Priority: Major
>
> When I have not declare the default constructor in the  RequestEvent then I got the below exception which is misleading.
>  
> {code:java}
> DataStream<RequestEvent> inputStream = env.addSource(...)
> tEnv.registerDataStream(...);
> {code}
>  
>  
> {code:java}
> Exception in thread "main" org.apache.flink.table.api.TableException: Only the first field can reference an atomic type.
>  at org.apache.flink.table.api.TableEnvironment$$anonfun$5.apply(TableEnvironment.scala:996)
>  at org.apache.flink.table.api.TableEnvironment$$anonfun$5.apply(TableEnvironment.scala:991)
>  at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
>  at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241)
>  at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
>  at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
>  at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:241)
>  at scala.collection.mutable.ArrayOps$ofRef.flatMap(ArrayOps.scala:186)
>  at org.apache.flink.table.api.TableEnvironment.getFieldInfo(TableEnvironment.scala:991)
>  at org.apache.flink.table.api.StreamTableEnvironment.registerDataStreamInternal(StreamTableEnvironment.scala:546)
>  at org.apache.flink.table.api.java.StreamTableEnvironment.registerDataStream(StreamTableEnvironment.scala:133)}}{code}



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