Github user sihuazhou commented on the issue:
https://github.com/apache/flink/pull/5934
Hi @StefanRRichter sorry for the unclearly description here. What this PR
trying to fix is the mainly relate to the below code which run async:
```java
for (Map.Entry<String, StateTable<K, ?, ?>> kvState :
stateTables.entrySet()) {
// do something
} // this will just close the outer compression stream
```
the `stateTables` may cause concurrency problem.---
