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https://issues.apache.org/jira/browse/HDFS-11696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16007208#comment-16007208
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Akira Ajisaka commented on HDFS-11696:
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Thank you for updating the patch, [~linyiqun]. Can we just ignore the warnings
in NNUpgradeUtil.java by adding a section in findbugs-exclude.xml? The method
throws NPE even after the fix when the input variable is null.
> Fix warnings from Spotbugs in hadoop-hdfs
> -----------------------------------------
>
> Key: HDFS-11696
> URL: https://issues.apache.org/jira/browse/HDFS-11696
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha3
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Attachments: findbugsHtml.html, HADOOP-14337.001.patch,
> HADOOP-14337.002.patch, HADOOP-14337.003.patch, HDFS-11696.004.patch,
> HDFS-11696.005.patch, HDFS-11696.006.patch
>
>
> There are totally 12 findbugs issues generated after switching from Findbugs
> to Spotbugs across the project in HADOOP-14316. This JIRA focus on cleaning
> up the part of warnings under scope of HDFS(mainly contained in hadoop-hdfs
> and hadoop-hdfs-client).
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