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https://issues.apache.org/jira/browse/HADOOP-13346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15646495#comment-15646495
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Xiao Chen commented on HADOOP-13346:
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+1 on patch 1, plan to commit on Tuesday if no objections.
> DelegationTokenAuthenticationHandler writes via closed writer
> -------------------------------------------------------------
>
> Key: HADOOP-13346
> URL: https://issues.apache.org/jira/browse/HADOOP-13346
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Reporter: Gregory Chanan
> Assignee: Hrishikesh Gadre
> Priority: Minor
> Attachments: HADOOP-13346-001.patch, HADOOP-13346.patch
>
>
> By default, jackson's ObjectMapper closes the writer after writing, so in the
> following code
> {code}
> ObjectMapper jsonMapper = new ObjectMapper();
> jsonMapper.writeValue(writer, map);
> writer.write(ENTER);
> {code}
> (https://github.com/apache/hadoop/blob/8a9d293dd60f6d51e1574e412d40746ba8175fe1/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/token/delegation/web/DelegationTokenAuthenticationHandler.java#L280-L282)
> writer.write actually writes to a closed stream. This doesn't seem to cause
> a problem with the version of jetty that hadoop uses (those just ignore
> closes), but causes problems on later verisons of jetty -- I hit this on
> jetty 8 while implementing SOLR-9200.
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