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https://issues.apache.org/jira/browse/HDFS-4031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473706#comment-13473706
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Eli Collins commented on HDFS-4031:
-----------------------------------
Note that the summary says "findbugs 2 exclusions" not "2 findbugs exclusions".
> Update findbugsExcludeFile.xml to include findbugs 2 exclusions
> ---------------------------------------------------------------
>
> Key: HDFS-4031
> URL: https://issues.apache.org/jira/browse/HDFS-4031
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Affects Versions: 2.0.0-alpha
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: hdfs-4031.txt
>
>
> Findbugs 2 warns about some volatile increments (VO_VOLATILE_INCREMENT) that
> unlike HDFS-4029 and HDFS-4030 are less problematic:
> - numFailedVolumes is only incremented in one thread and that access is
> synchronized
> - pendingReceivedRequests in BPServiceActor is clearly synchronized
> It would be reasonable to make these Atomics as well but I think they're uses
> are clearly correct so figured for these the warning was more obviously bogus
> and so could be ignored.
> There's also a SE_BAD_FIELD_INNER_CLASS warning (LocalDatanodeInfo's
> anonymous class is serializable but it is not) in BPServiceActor is OK to
> ignore since we don't serialize LocalDatanodeInfo.
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