Github user GJL commented on a diff in the pull request:
https://github.com/apache/flink/pull/5933#discussion_r184892245
--- Diff:
flink-test-utils-parent/flink-test-utils/src/main/java/org/apache/flink/test/util/MiniClusterResource.java
---
@@ -137,6 +142,7 @@ public int getWebUIPort() {
@Override
public void before() throws Exception {
+ temporaryFolder.create();
--- End diff --
It's wrong to call `create`:
```
/**
* for testing purposes only. Do not use.
*/
public void create() throws IOException {
folder = createTemporaryFolderIn(parentFolder);
}
```
---
