Thanks Venkata for the quick response. I hope this information would be helpful.
I am using CDH4 and I am trying to access GPU from cleanup() method of mapper class using JOCL <http://www.jocl.org/>. I am using this as third party jar in my MR code. (Note: My normal code using JOCL (without map reduce) works fine on GPU). When I execute my map-reduce code, It throws an error (specified below). ******************************Error******************************************** attempt_201309171647_0021_m_000000_1: No protocol specified attempt_201309171647_0021_m_000000_1:* No protocol specified* 13/09/20 18:03:01 INFO mapred.JobClient: Task Id : attempt_201309171647_0021_m_000000_2, Status : FAILED org.jocl.CLException:* CL_DEVICE_NOT_FOUND* at org.jocl.CL.checkResult(CL.java:569) at org.jocl.CL.clGetDeviceIDs(CL.java:2239) at com.testMR.jocl.WordCountMapper.cleanup(WordCountMapper.java:106) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:672) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:330) at org.apache.hadoop.mapred.Child$4.run(Child.java:268) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408) at org.apache.hadoop.mapred.Child.main(Child.java:262) ****************************************************************************** *Each map task throws an error "No protocol specified". what does this mean ?* What are the protocols used in mapper class ? My mapper runs successfully if I change the mode from GPU to CPU in the code. -Regards Rohit On Sat, Sep 21, 2013 at 9:18 PM, Venkata K Pisupat < [email protected]> wrote: > That does not seem to be a Hadoop error message. Check with OS. I believe > it's coming from the OS level. A little more context on problem would be > helpful. The full error message and steps that are leading to the problem, > which version of Hadoop are you using etc. > > Thanks and Regards, > Krishna Pisupat > > > On Sep 21, 2013, at 7:30 AM, rohit sarewar <[email protected]> wrote: > > > Hi All > > > > My map task failed stating the error message "No protocol specified". > > What does this mean ? > > > > Regards > > Rohit Sarewar > >
