Github user zsxwing commented on the issue:
https://github.com/apache/spark/pull/13513
@jerryshao here is a test case to show the issue about `getBatch`:
```Scala
test("getBatch") {
withTempDirs { case (src, tmp) =>
withSQLConf(
SQLConf.FILE_SOURCE_LOG_COMPACT_INTERVAL.key -> "2",
// Force deleting the old logs
SQLConf.FILE_SOURCE_LOG_CLEANUP_DELAY.key -> "1"
) {
val fileStream = createFileStream("text", src.getCanonicalPath)
val filtered = fileStream.filter($"value" contains "keep")
testStream(filtered)(
AddTextFileData("keep1", src, tmp),
CheckAnswer("keep1"),
AddTextFileData("keep2", src, tmp),
CheckAnswer("keep1", "keep2"),
AddTextFileData("keep3", src, tmp),
CheckAnswer("keep1", "keep2", "keep3"),
AssertOnQuery("check getBatch") { execution: StreamExecution =>
val _sources = PrivateMethod[Seq[Source]]('sources)
val fileSource =
(execution invokePrivate
_sources()).head.asInstanceOf[FileStreamSource]
assert(fileSource.getBatch(None,
LongOffset(2)).as[String].collect() ===
List("keep1", "keep2", "keep3"))
assert(fileSource.getBatch(Some(LongOffset(0)),
LongOffset(2)).as[String].collect() ===
List("keep2", "keep3"))
assert(fileSource.getBatch(Some(LongOffset(1)),
LongOffset(2)).as[String].collect() ===
List("keep3"))
}
)
}
}
}
```
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