Xu Pingyong created FLINK-7423:
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Summary: 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
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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