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Posted to user@hadoop.apache.org by Satyam Singh <sa...@ericsson.com> on 2014/08/12 20:21:29 UTC
Making All datanode down
Hi Users,
In my cluster setup i am doing one test case of making only all
datanodes down and keep namenode running.
In this case my application gets error with remoteException:
could only be replicated to 0 nodes instead of minReplication (=1).
There are 0 datanode(s) running and no node(s) are excluded in this
operation
Then i make all datanodes up, but i still faces above exception looks
like datanode came up but not sync with namenode.
I have to then restart my application for writing files to hdfs. After
restart it starts processing fine but i don't want to kill my
application in this case.
Prompt help is highly appreciated!!
Regards,
Satyam
Re: Making All datanode down
Posted by Gordon Wang <gw...@pivotal.io>.
Did you try to close the file and reopen it for writing after datanodes
restart ?
I think if you close the file and reopen it. The exception might disappear.
On Wed, Aug 13, 2014 at 2:21 AM, Satyam Singh <sa...@ericsson.com>
wrote:
> Hi Users,
>
>
>
> In my cluster setup i am doing one test case of making only all datanodes
> down and keep namenode running.
>
> In this case my application gets error with remoteException:
> could only be replicated to 0 nodes instead of minReplication (=1).
> There are 0 datanode(s) running and no node(s) are excluded in this
> operation
>
> Then i make all datanodes up, but i still faces above exception looks like
> datanode came up but not sync with namenode.
>
> I have to then restart my application for writing files to hdfs. After
> restart it starts processing fine but i don't want to kill my application
> in this case.
>
>
>
> Prompt help is highly appreciated!!
>
> Regards,
> Satyam
>
--
Regards
Gordon Wang
Re: Making All datanode down
Posted by Gordon Wang <gw...@pivotal.io>.
Did you try to close the file and reopen it for writing after datanodes
restart ?
I think if you close the file and reopen it. The exception might disappear.
On Wed, Aug 13, 2014 at 2:21 AM, Satyam Singh <sa...@ericsson.com>
wrote:
> Hi Users,
>
>
>
> In my cluster setup i am doing one test case of making only all datanodes
> down and keep namenode running.
>
> In this case my application gets error with remoteException:
> could only be replicated to 0 nodes instead of minReplication (=1).
> There are 0 datanode(s) running and no node(s) are excluded in this
> operation
>
> Then i make all datanodes up, but i still faces above exception looks like
> datanode came up but not sync with namenode.
>
> I have to then restart my application for writing files to hdfs. After
> restart it starts processing fine but i don't want to kill my application
> in this case.
>
>
>
> Prompt help is highly appreciated!!
>
> Regards,
> Satyam
>
--
Regards
Gordon Wang
Re: Making All datanode down
Posted by Gordon Wang <gw...@pivotal.io>.
Did you try to close the file and reopen it for writing after datanodes
restart ?
I think if you close the file and reopen it. The exception might disappear.
On Wed, Aug 13, 2014 at 2:21 AM, Satyam Singh <sa...@ericsson.com>
wrote:
> Hi Users,
>
>
>
> In my cluster setup i am doing one test case of making only all datanodes
> down and keep namenode running.
>
> In this case my application gets error with remoteException:
> could only be replicated to 0 nodes instead of minReplication (=1).
> There are 0 datanode(s) running and no node(s) are excluded in this
> operation
>
> Then i make all datanodes up, but i still faces above exception looks like
> datanode came up but not sync with namenode.
>
> I have to then restart my application for writing files to hdfs. After
> restart it starts processing fine but i don't want to kill my application
> in this case.
>
>
>
> Prompt help is highly appreciated!!
>
> Regards,
> Satyam
>
--
Regards
Gordon Wang
Re: Making All datanode down
Posted by Gordon Wang <gw...@pivotal.io>.
Did you try to close the file and reopen it for writing after datanodes
restart ?
I think if you close the file and reopen it. The exception might disappear.
On Wed, Aug 13, 2014 at 2:21 AM, Satyam Singh <sa...@ericsson.com>
wrote:
> Hi Users,
>
>
>
> In my cluster setup i am doing one test case of making only all datanodes
> down and keep namenode running.
>
> In this case my application gets error with remoteException:
> could only be replicated to 0 nodes instead of minReplication (=1).
> There are 0 datanode(s) running and no node(s) are excluded in this
> operation
>
> Then i make all datanodes up, but i still faces above exception looks like
> datanode came up but not sync with namenode.
>
> I have to then restart my application for writing files to hdfs. After
> restart it starts processing fine but i don't want to kill my application
> in this case.
>
>
>
> Prompt help is highly appreciated!!
>
> Regards,
> Satyam
>
--
Regards
Gordon Wang