[jira] [Updated] (FLINK-7423) Always reuse an instance to get elements from an inputFormat

["Xu Pingyong (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-7423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xu Pingyong updated FLINK-7423:
-------------------------------
    Component/s: Streaming

> Always reuse an instance  to get elements from an inputFormat 
> --------------------------------------------------------------
>
>                 Key: FLINK-7423
>                 URL: https://issues.apache.org/jira/browse/FLINK-7423
>             Project: Flink
>          Issue Type: Bug
>          Components: Streaming
>            Reporter: Xu Pingyong
>            Assignee: Xu Pingyong
>
> In InputFormatSourceFunction.java:
> {code:java}
> OUT nextElement = serializer.createInstance();
> 			while (isRunning) {
> 				format.open(splitIterator.next());
> 				// for each element we also check if cancel
> 				// was called by checking the isRunning flag
> 				while (isRunning && !format.reachedEnd()) {
> 					nextElement = format.nextRecord(nextElement);
> 					if (nextElement != null) {
> 						ctx.collect(nextElement);
> 					} else {
> 						break;
> 					}
> 				}
> 				format.close();
> 				completedSplitsCounter.inc();
> 				if (isRunning) {
> 					isRunning = splitIterator.hasNext();
> 				}
> 			}
> {code}
> the format may return other element or null when nextRecord, that will may cause exception.



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