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https://issues.apache.org/jira/browse/HDDS-2523?focusedWorklogId=346998&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-346998
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ASF GitHub Bot logged work on HDDS-2523:
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Author: ASF GitHub Bot
Created on: 20/Nov/19 20:48
Start Date: 20/Nov/19 20:48
Worklog Time Spent: 10m
Work Description: dineshchitlangia commented on pull request #232:
HDDS-2523. BufferPool.releaseBuffer may release a buffer different than the
head of the list
URL: https://github.com/apache/hadoop-ozone/pull/232
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Issue Time Tracking
-------------------
Worklog Id: (was: 346998)
Time Spent: 20m (was: 10m)
> BufferPool.releaseBuffer may release a buffer different than the head of the
> list
> ---------------------------------------------------------------------------------
>
> Key: HDDS-2523
> URL: https://issues.apache.org/jira/browse/HDDS-2523
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Client
> Reporter: Tsz-wo Sze
> Assignee: Attila Doroszlai
> Priority: Major
> Labels: pull-request-available
> Attachments: a.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> {code}
> //BufferPool
> public void releaseBuffer(ByteBuffer byteBuffer) {
> // always remove from head of the list and append at last
> ByteBuffer buffer = bufferList.remove(0);
> // Ensure the buffer to be removed is always at the head of the list.
> Preconditions.checkArgument(buffer.equals(byteBuffer));
> buffer.clear();
> bufferList.add(buffer);
> Preconditions.checkArgument(currentBufferIndex >= 0);
> currentBufferIndex--;
> }
> {code}
> In the code above, it expects buffer and byteBuffer are the same object, i.e.
> buffer == byteBuffer. However the precondition is checking
> buffer.equals(byteBuffer). Unfortunately, both buffer and byteBuffer have
> remaining() == 0 so that equals(..) returns true and the precondition does
> not catch the bug.
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