hadoop/hadoop-tools/hadoop-aws/dev-support/findbugs-exclude.xml

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<FindBugsFilter>

  <!-- same code as in FileSystem is triggering the same warning. -->
  <Match>
    <Class name="org.apache.hadoop.fs.s3native.S3xLoginHelper" />
    <Method name="checkPath" />
    <Bug pattern="ES_COMPARING_STRINGS_WITH_EQ" />
  </Match>
  <!-- Redundant null check makes code clearer, future-proof here. -->
  <Match>
    <Class name="org.apache.hadoop.fs.s3a.S3AFileSystem" />
    <Method name="s3Exists" />
    <Bug pattern="RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE" />
  </Match>
</FindBugsFilter>