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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2021/09/17 09:01:53 UTC

[GitHub] [hadoop] minni31 commented on pull request #3445: HADOOP-15566 Opentelemtery changes using java agent

minni31 commented on pull request #3445:
URL: https://github.com/apache/hadoop/pull/3445#issuecomment-921631542


   Thanks @ArkenKiran 
   With your changes, I tried running mapreduce pi example, it is failing with NPE
   
   hadoop jar C:\RMCosmos\OpenTelemtryHadoop\hadoop\hadoop-dist\target\hadoop-3.4.0-SNAPSHOT\share\hadoop\mapreduce\hadoop-mapreduce-examples-3.4.0-SNAPSHOT.jar pi 2 2
   
   Number of Maps  = 2
   Samples per Map = 2
   2021-09-17 14:27:37,367 WARN  [DataStreamer for file /user/mimittal/QuasiMonteCarlo_1631869056391_2017853234/in/part0 block BP-346835553-172.20.0.1-1631788949347:blk_1073741834_1010] hdfs.DataStreamer (DataStreamer.java:run(819)) - DataStreamer Exception
   java.lang.NullPointerException
           at org.apache.hadoop.tracing.Tracer.newSpan(Tracer.java:60)
           at org.apache.hadoop.tracing.Tracer.newScope(Tracer.java:66)
           at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:760)
   java.io.IOException: java.lang.NullPointerException
           at org.apache.hadoop.hdfs.ExceptionLastSeen.set(ExceptionLastSeen.java:45)
           at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:822)
   Caused by: java.lang.NullPointerException
           at org.apache.hadoop.tracing.Tracer.newSpan(Tracer.java:60)
           at org.apache.hadoop.tracing.Tracer.newScope(Tracer.java:66)
           at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:760)
   
   Please help with debugging of the issue. 


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