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https://issues.apache.org/jira/browse/HADOOP-16386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16885040#comment-16885040
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Steve Loughran commented on HADOOP-16386:
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jenkins is complaining about this
What's the actual problem: the fact it's an enum with a map inside, and the
java lang spec says "enums must serialize"?
If so, marking it as transient should be enough to stop the complaints
> FindBugs warning in branch-2: GlobalStorageStatistics defines non-transient
> non-serializable instance field map
> ---------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-16386
> URL: https://issues.apache.org/jira/browse/HADOOP-16386
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.10.0
> Reporter: Wei-Chiu Chuang
> Priority: Major
>
> Found in HDFS-14585
> https://builds.apache.org/job/PreCommit-HDFS-Build/27024/artifact/out/branch-findbugs-hadoop-common-project_hadoop-common-warnings.html#Warnings_BAD_PRACTICE
> {quote}Class org.apache.hadoop.fs.GlobalStorageStatistics defines
> non-transient non-serializable instance field map
> Bug type SE_BAD_FIELD (click for details)
> In class org.apache.hadoop.fs.GlobalStorageStatistics
> Field org.apache.hadoop.fs.GlobalStorageStatistics.map
> Actual type org.apache.hadoop.fs.StorageStatistics
> In GlobalStorageStatistics.java{quote}
> {quote}SE_BAD_FIELD: Non-transient non-serializable instance field in
> serializable class
> This Serializable class defines a non-primitive instance field which is
> neither transient, Serializable, or java.lang.Object, and does not appear to
> implement the Externalizable interface or the readObject() and writeObject()
> methods. Objects of this class will not be deserialized correctly if a
> non-Serializable object is stored in this field.{quote}
> Looking in my inbox, this warning has been there since Feburary 9, 2019
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