adoroszlai commented on PR #6652:
URL: https://github.com/apache/ozone/pull/6652#issuecomment-2493288492

   Updated:
   - merged master
   - reduce change (from `master`) by keeping `long` return value
   - updated `MockGatheringChannel` to simulate partial write
   
   Test now reproduces the problem without the fix:
   
   ```
   [ERROR] Tests run: 3, Failures: 2, Errors: 1, Skipped: 0, Time elapsed: 
0.482 s <<< FAILURE! - in org.apache.hadoop.ozone.common.TestChunkBuffer
   [ERROR] org.apache.hadoop.ozone.common.TestChunkBuffer.testImplWithList  
Time elapsed: 0.135 s  <<< ERROR!
   IllegalArgumentException: all buffers after current one should have 
position=0
     ...
     at 
com.google.common.base.Preconditions.checkArgument(Preconditions.java:143)
     at 
org.apache.hadoop.ozone.common.ChunkBufferImplWithByteBufferList.findCurrent(ChunkBufferImplWithByteBufferList.java:69)
     at 
org.apache.hadoop.ozone.common.ChunkBufferImplWithByteBufferList.writeTo(ChunkBufferImplWithByteBufferList.java:250)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.assertWrite(TestChunkBuffer.java:231)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.runTestImpl(TestChunkBuffer.java:169)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.runTestImplWithList(TestChunkBuffer.java:133)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.testImplWithList(TestChunkBuffer.java:105)
   
   [ERROR] 
org.apache.hadoop.ozone.common.TestChunkBuffer.testImplWithByteBuffer  Time 
elapsed: 0.13 s  <<< FAILURE!
   AssertionFailedError: array lengths differ, expected: <1024> but was: <1023>
     at org.junit.jupiter.api.Assertions.assertArrayEquals(Assertions.java:1229)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.assertWrite(TestChunkBuffer.java:232)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.runTestImpl(TestChunkBuffer.java:169)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.runTestImplWithByteBuffer(TestChunkBuffer.java:77)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.testImplWithByteBuffer(TestChunkBuffer.java:67)
   
   [ERROR] 
org.apache.hadoop.ozone.common.TestChunkBuffer.testIncrementalChunkBuffer  Time 
elapsed: 0.121 s  <<< FAILURE!
   AssertionFailedError: array lengths differ, expected: <8> but was: <6>
     at org.junit.jupiter.api.Assertions.assertArrayEquals(Assertions.java:1229)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.assertWrite(TestChunkBuffer.java:232)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.runTestImpl(TestChunkBuffer.java:169)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.runTestIncrementalChunkBuffer(TestChunkBuffer.java:98)
     at 
org.apache.hadoop.ozone.common.TestChunkBuffer.testIncrementalChunkBuffer(TestChunkBuffer.java:85)
   ```


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