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Date: Mon, 17 Oct 2011 20:53:10 +0000 (UTC)
From: "Arpit Gupta (Commented) (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-2458) webhdfs create call throws an error
 after the redirect if the file exists, we should throw a 403 before
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    [ https://issues.apache.org/jira/browse/HDFS-2458?page=3Dcom.atlassian.=
jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D13129=
180#comment-13129180 ]=20

Arpit Gupta commented on HDFS-2458:
-----------------------------------

Issue a create call using rest api's for a file that exists.

Actual
1. received a 307 and on the redirected call received a 403

with the message

{"RemoteException":{"exception":"RemoteException","javaClassName":"org.apac=
he.hadoop.ipc.RemoteException","message":"java.io.IOException: failed to cr=
eate file /tmp/webhdfs_data/file_that_exists.txt on client 127.0.0.1 either=
 because the filename is invalid or the file exists\n\tat org.apache.hadoop=
.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1237=
)\n\tat org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNam=
esystem.java:1166)\n\tat org.apache.hadoop.hdfs.server.namenode.NameNode.cr=
eate(NameNode.java:617)\n\tat sun.reflect.GeneratedMethodAccessor11.invoke(=
Unknown Source)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(Deleg=
atingMethodAccessorImpl.java:25)\n\tat java.lang.reflect.Method.invoke(Meth=
od.java:597)\n\tat org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)\n\ta=
t org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)\n\tat org.ap=
ache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)\n\tat java.security.=
AccessController.doPrivileged(Native Method)\n\tat javax.security.auth.Subj=
ect.doAs(Subject.java:396)\n\tat org.apache.hadoop.security.UserGroupInform=
ation.doAs(UserGroupInformation.java:1059)\n\tat org.apache.hadoop.ipc.Serv=
er$Handler.run(Server.java:1382)\n"}}


If an error is going to be thrown in the create or append calls we should t=
hrow it before the redirect if possible.

               =20
> webhdfs create call throws an error after the redirect if the file exists=
, we should throw a 403 before
> -------------------------------------------------------------------------=
------------------------------
>
>                 Key: HDFS-2458
>                 URL: https://issues.apache.org/jira/browse/HDFS-2458
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.20.205.0
>            Reporter: Arpit Gupta
>            Assignee: Tsz Wo (Nicholas), SZE
>


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