924060929 opened a new issue #5335:
URL: https://github.com/apache/incubator-doris/issues/5335
**Describe the bug**
When I use spark on doris with config
`doris.deserialize.arrow.async=true`，ScalaValueReader throw
TApplicationException: get_next failed: out of sequence response: expected 21
but got 20.
And then, ScalaValueReader will **block forever**
This is because, when `doris.deserialize.arrow.async=true`, `get_next()`
will invoke in **asyncThread**，but `close()` will invoke in **current thread**,
the sequence will encounter race condition
**To Reproduce**
run
``` scala
val sparkSettings = new SparkSettings(sparkConf)
sparkSettings.setProperty("doris.deserialize.arrow.async", "true")
val partitions = RestService.findPartitions(sparkSettings, logger)
val reader = new ScalaDorisRowValueReader(partitions.get(0),
partitions.get(0).settings())
while (reader.hasNext) {
val nextBatch = reader.next // invoke in asyncThread
}
reader.close() // invoke in current thread
```
**Expected behavior**
No exception
**Screenshots**
**Desktop (please complete the following information):**
None
**Smartphone (please complete the following information):**
None
**Additional context**
None
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