Alan created FLINK-18909:
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Summary: SequenceGenerator doesn't work as expected
Key: FLINK-18909
URL:
https://issues.apache.org/jira/browse/FLINK-18909 Project: Flink
Issue Type: Bug
Components: API / DataStream
Affects Versions: 1.11.1
Reporter: Alan
When using a org.apache.flink.streaming.api.functions.source.datagen.SequenceGenerator
with 0 and Long.MaxValue the following exception is rasied:
<<snip>>
new SequenceGenerator(0, Long.MAX_VALUE);
Caused by: java.lang.IllegalArgumentExceptionCaused by: java.lang.IllegalArgumentException at org.apache.flink.util.Preconditions.checkArgument(Preconditions.java:123) at org.apache.flink.streaming.api.functions.source.datagen.SequenceGenerator.safeDivide(SequenceGenerator.java:110) at org.apache.flink.streaming.api.functions.source.datagen.SequenceGenerator.open(SequenceGenerator.java:83) at org.apache.flink.streaming.api.functions.source.datagen.DataGeneratorSource.initializeState(DataGeneratorSource.java:64)
This is because the Long overflows. in the check:
long totalNoOfElements = Math.abs(end - start + 1);
Which is incorrect. - this code should use BigInteger.
Using
new SequenceGenerator(0, Long.MAX_VALUE-1);
Still fails on the following check:
Caused by: java.lang.IllegalArgumentExceptionCaused by: java.lang.IllegalArgumentException at org.apache.flink.util.Preconditions.checkArgument(Preconditions.java:123) at org.apache.flink.streaming.api.functions.source.datagen.SequenceGenerator.safeDivide(SequenceGenerator.java:111) at org.apache.flink.streaming.api.functions.source.datagen.SequenceGenerator.open(SequenceGenerator.java:83) at org.apache.flink.streaming.api.functions.source.datagen.DataGeneratorSource.initializeState(DataGeneratorSource.java:64)
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