Hi All My mappers fail throwing error message "stderr logs-No protocol specified".
What could be the possible reason ? Please find the complete error message below. Task Logs: 'attempt_201309171647_0022_m_000000_0' *stdout logs* ------------------------------ *stderr logs* *No protocol specified No protocol specified* ------------------------------ *syslog logs* 2013-09-20 19:52:46,671 WARN mapreduce.Counters: Group org.apache.hadoop.mapred.Task$Counter is deprecated. Use org.apache.hadoop.mapreduce.TaskCounter instead 2013-09-20 19:52:47,009 WARN org.apache.hadoop.conf.Configuration: session.id is deprecated. Instead, use dfs.metrics.session-id 2013-09-20 19:52:47,010 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: Initializing JVM Metrics with processName=MAP, sessionId= 2013-09-20 19:52:47,281 INFO org.apache.hadoop.util.ProcessTree: setsid exited with exit code 0 2013-09-20 19:52:47,289 INFO org.apache.hadoop.mapred.Task: Using ResourceCalculatorPlugin : org.apache.hadoop.util.LinuxResourceCalculatorPlugin@6d7e4dee 2013-09-20 19:52:47,485 INFO org.apache.hadoop.mapred.MapTask: Processing split: hdfs://hpc1.musigma.com:8020/user/musigma/inputWC:0+3030 2013-09-20 <http://hpc1.musigma.com:8020/user/musigma/inputWC:0+30302013-09-20> 19:52:47,490 INFO org.apache.hadoop.mapred.MapTask: Map output collector class = org.apache.hadoop.mapred.MapTask$MapOutputBuffer 2013-09-20 19:52:47,493 INFO org.apache.hadoop.mapred.MapTask: io.sort.mb = 131 2013-09-20 19:52:47,544 INFO org.apache.hadoop.mapred.MapTask: data buffer = 104396240/130495296 2013-09-20 19:52:47,545 INFO org.apache.hadoop.mapred.MapTask: record buffer = 343408/429260 2013-09-20 19:52:47,608 INFO org.apache.hadoop.mapred.TaskLogsTruncater: Initializing logs' truncater with mapRetainSize=-1 and reduceRetainSize=-1 2013-09-20 19:52:47,612 WARN org.apache.hadoop.mapred.Child: Error running child 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) 2013-09-20 19:52:47,618 INFO org.apache.hadoop.mapred.Task: Runnning cleanup for the task Regards Rohit
