I think you can try to use jdb, which exists in $JAVA_HOME/bin.
Regards
Bing
2013/11/4 Karim Awara <karim.aw...@kaust.edu.sa>
> Hi,
>
> I want to trace the calls that both the DataNode and the NameNode do when
> I execute a shell command on the hdfs such as (hadoop dfs -put {src}
> {dst}). Any idea how to do that?
>
>
> ; tracing including the data node asking the name node for the blockID..
> also the class where datanode use to determine the replica datanodes in the
> pipe ..etc
>
> --
> Best Regards,
> Karim Ahmed Awara
>
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--
Bing Jiang
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Focus on distributed computing, HDFS/HBase
