iwasakims commented on pull request #2645:
URL: https://github.com/apache/hadoop/pull/2645#issuecomment-767306407
The failure of TestDFSOutputStream#testCongestionBackoff is related.
```
[ERROR] Tests run: 9, Failures: 1, Errors: 0, Skipped: 0, Time elapsed:
14.594 s <<< FAILURE! - in org.apache.hadoop.hdfs.TestDFSOutputStream
[ERROR] testCongestionBackoff(org.apache.hadoop.hdfs.TestDFSOutputStream)
Time elapsed: 2.71 s <<< FAILURE!
java.lang.AssertionError
at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:832)
at
org.apache.hadoop.hdfs.TestDFSOutputStream.testCongestionBackoff(TestDFSOutputStream.java:299)
```
The NPE is on DataStreamer.java:702.
```
java.lang.NullPointerException
at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:702)
at
org.apache.hadoop.hdfs.TestDFSOutputStream.testCongestionBackoff(TestDFSOutputStream.java:299)
```
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