Re: how to create symbolic link in hdfs with c++ code or webhdfs interface?
To Vinod,
thank you for your reply, I found that I got this error message because I
did not add the following property in the hdfs-site.xml file
28 property
29 nametest.SymlinkEnabledForTesting/name
30 valuetrue/value
31 /property
now the problem is solved.
thanks again.
2013/12/14 Vinod Kumar Vavilapalli vino...@hortonworks.com
What version of Hadoop?
Thanks,
+Vinod
On Dec 13, 2013, at 1:57 AM, Xiaobin She xiaobin...@gmail.com wrote:
I'm writting an c++ programme, and I need to deal with hdfs.
What I need is to create some file in hdfs and read the status of these
files.
And I need to be able to create sym link in hdfs and need to know if an
file in hdfs is an sym link file or not.
According to what I have known, the c client lib of hdfs ( which is
libhdfs) does not support sym link.
And I have notice that there is an webhdfs interface for hdfs.
According to this page, it does support sym link.
http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Create_a_Symbolic_Link
But I have try this, and I got the following message.
{RemoteException:{exception:UnsupportedOperationException,javaClassName:java.lang.UnsupportedOperationException,message:Symlinks
not supported}}
Does this means webhdfs does not support sym link too ?
So if this true, how can I create an sym link and get the status of this
file in c++ code?
thank you very much for your help.
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Re: how to create symbolic link in hdfs with c++ code or webhdfs interface?
Why enable test flag under non-test environment?
On Mon, Dec 16, 2013 at 11:10 AM, Xiaobin She xiaobin...@gmail.com wrote:
To Vinod,
thank you for your reply, I found that I got this error message because I
did not add the following property in the hdfs-site.xml file
28 property
29 nametest.SymlinkEnabledForTesting/name
30 valuetrue/value
31 /property
now the problem is solved.
thanks again.
2013/12/14 Vinod Kumar Vavilapalli vino...@hortonworks.com
What version of Hadoop?
Thanks,
+Vinod
On Dec 13, 2013, at 1:57 AM, Xiaobin She xiaobin...@gmail.com wrote:
I'm writting an c++ programme, and I need to deal with hdfs.
What I need is to create some file in hdfs and read the status of these
files.
And I need to be able to create sym link in hdfs and need to know if an
file in hdfs is an sym link file or not.
According to what I have known, the c client lib of hdfs ( which is
libhdfs) does not support sym link.
And I have notice that there is an webhdfs interface for hdfs.
According to this page, it does support sym link.
http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Create_a_Symbolic_Link
But I have try this, and I got the following message.
{RemoteException:{exception:UnsupportedOperationException,javaClassName:java.lang.UnsupportedOperationException,message:Symlinks
not supported}}
Does this means webhdfs does not support sym link too ?
So if this true, how can I create an sym link and get the status of this
file in c++ code?
thank you very much for your help.
CONFIDENTIALITY NOTICE
NOTICE: This message is intended for the use of the individual or entity
to which it is addressed and may contain information that is confidential,
privileged and exempt from disclosure under applicable law. If the reader
of this message is not the intended recipient, you are hereby notified that
any printing, copying, dissemination, distribution, disclosure or
forwarding of this communication is strictly prohibited. If you have
received this communication in error, please contact the sender immediately
and delete it from your system. Thank You.
Re: how to create symbolic link in hdfs with c++ code or webhdfs interface?
What version of Hadoop?
Thanks,
+Vinod
On Dec 13, 2013, at 1:57 AM, Xiaobin She xiaobin...@gmail.com wrote:
I'm writting an c++ programme, and I need to deal with hdfs.
What I need is to create some file in hdfs and read the status of these files.
And I need to be able to create sym link in hdfs and need to know if an file
in hdfs is an sym link file or not.
According to what I have known, the c client lib of hdfs ( which is libhdfs)
does not support sym link.
And I have notice that there is an webhdfs interface for hdfs.
According to this page, it does support sym link.
http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Create_a_Symbolic_Link
But I have try this, and I got the following message.
{RemoteException:{exception:UnsupportedOperationException,javaClassName:java.lang.UnsupportedOperationException,message:Symlinks
not supported}}
Does this means webhdfs does not support sym link too ?
So if this true, how can I create an sym link and get the status of this file
in c++ code?
thank you very much for your help.
--
CONFIDENTIALITY NOTICE
NOTICE: This message is intended for the use of the individual or entity to
which it is addressed and may contain information that is confidential,
privileged and exempt from disclosure under applicable law. If the reader
of this message is not the intended recipient, you are hereby notified that
any printing, copying, dissemination, distribution, disclosure or
forwarding of this communication is strictly prohibited. If you have
received this communication in error, please contact the sender immediately
and delete it from your system. Thank You.
