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Date: Wed, 7 Dec 2016 23:36:01 +0000 (UTC)
From: "Weiwei Yang (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.13024331.1480486755000.466289.1481153761339@Atlassian.JIRA>
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References: <JIRA.13024331.1480486755000@Atlassian.JIRA> <JIRA.13024331.1480486755351@arcas>
Subject: [jira] [Commented] (HDFS-11189) WebHDFS and FollowRedirects
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archived-at: Wed, 07 Dec 2016 23:36:03 -0000


    [ https://issues.apache.org/jira/browse/HDFS-11189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15730297#comment-15730297 ] 

Weiwei Yang commented on HDFS-11189:
------------------------------------

Hi [~guadilla]

If you have an error stack trace, that will help to explain the problem.
At mean time I am running out of idea about what would be the root cause of this issue, I cannot make any fix if the issue can not be reproduced. I'll let others see if they have any more ideas. 

> WebHDFS and FollowRedirects
> ---------------------------
>
>                 Key: HDFS-11189
>                 URL: https://issues.apache.org/jira/browse/HDFS-11189
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 2.7.3
>         Environment: We are using webhdfs from a j2ee environment with java 6. In the web application we have a lot of libraries: spring, jersey, jackson...
>            Reporter: Oscar Guadilla
>         Attachments: WebHdfsFileSystem.java
>
>
> In some cases with simple operations (get file - non two step operation) we detect that FollowRedirects flag of http comes as "false" and it makes webhdfs crash.
> We don't really know which library change this behavior and it is really strange because the change is done directly in the jvm because in other wars/ears of the same j2ee server it fails also. If we restart the j2ee server it starts working again.
> To fix the problem we changed the WebHdfsFileSystem class adding "setInstanceFollowRedirects(true)" in the connection management instead of supposing that it should be true and it works fine.
> The same problem arises both in 1.x and 2.x webhdfs. We didn't test in 3.x
> Could you fix it? We did it in our environment but it would fine in it could be included in the next releases.
> Thanks in advance,
> Oscar


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