文报 created FLINK-26938:
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Summary: HybridSource recovery from savepoint fails When flink
parallelism is greater than the number of Kafka partitions
Key: FLINK-26938
URL: https://issues.apache.org/jira/browse/FLINK-26938
Project: Flink
Issue Type: Bug
Components: API / DataStream
Affects Versions: 1.14.0
Environment: Flink 1.14.0
Reporter: 文报
Attachments: image-2022-03-31-13-25-28-520.png
First test
Flink job before savePoint
flink parallelism =16
kafka partition=3
Flink after savePoint
case 1：
flink parallelism =16
kafka partition=3
HybridSource recovery from savepoint fails
!image-2022-03-31-11-12-56-562.png!
case 2：
flink parallelism =3
kafka partition=3
HybridSource recovery from savepoint successful
case 3：
flink parallelism =8
kafka partition=3
HybridSource recovery from savepoint fails the same NullPointerException:
Source for index=0 not available
case 4：
flink parallelism =4
kafka partition=3
HybridSource recovery from savepoint fails the same NullPointerException:
Source for index=0 not available
case 5：
flink parallelism =1
kafka partition=3
HybridSource recovery from savepoint successful
Second test
Flink job before savePoint
flink parallelism =3
kafka partition=3
Flink after savePoint
case 1：
flink parallelism =3
kafka partition=3
HybridSource recovery from savepoint successful
case 2：
flink parallelism =1
kafka partition=3
HybridSource recovery from savepoint successful
case 3：
flink parallelism =4
kafka partition=3
HybridSource recovery from savepoint fails the same NullPointerException:
Source for index=0 not available
Specific code see the attached test code HybridSourceTest
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