Hi All,
I just wanted to check if anybody had a comment on this query.
Thanks,
-Shrinivas
On Wed, Jun 16, 2010 at 9:50 PM, Shrinivas Joshi jshrini...@gmail.comwrote:
Sorry if this is repeat email for you, I did send this to common-dev list
as well.
Hello,
I am trying to get profiles for a workload running on top of Hadoop 0.20.2
framework. The workload jars and Hadoop jars have been compiled with debug
symbols enabled. I could see local variable tables and line number tables in
the jar class files using javap. I am passing the right value for *
agentpath* flag pointing to oprofile JVMTI agent and I am also seeing it
passed correctly to map and reduce JVMs from *ps *output. This is done
through conf/mapred-site.xml properties. However, in the profiles I am
unable to see meaningful samples for JITed code; everything is getting
attributed to anon samples.
Profiling a test app works just fine with the same JVM that is being used
by Hadoop. I can see the right debug symbols being attributed in the
resulting profiling. In fact, I even tried profiling a JVM process that was
spawned using *ProcessBuilder* API, the way Hadoop spawns its map and
reduce JVMs, that seem to work fine too.
Does anybody have any pointers as to what I might be missing here? Has
anybody successfully collected profiles showing JIT debug symbols for any
Hadoop workload? I am using OProfile 0.9.6.
Thanks,
-Shrinivas
